diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 95d70dc18..d3f173704 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -42,6 +42,12 @@ When you write Solidity code, be aware of the distinction between ``assert(cond)
 
 ``assert(cond)`` and ``require(cond)`` both cause a failure in the EVM execution when ``cond`` evaluates to 0.  They use different EVM opcodes that cause different gas consumptions.  More importantly, a convention dictates when to use which.  Use ``assert(cond)`` only when you are confident that ``cond`` is always true.  When an ``assert`` fires, that's considered as a bug in the Solidity program (or the Solidity compiler).  For detecting invalid user inputs or invalid return values from other contracts, use ``require()``.
 
+#### Returning a Boolean Indicating Success
+
+We currently check the return values from all external function calls.  In the Solidity code, all external function calls should happen within `require(...)` unless the function returns nothing.
+
+When we implement a function that has nothing to return, we make the function always return true.  So we have a more consistent visual look without naked calls.
+
 #### Signature Convention
 
 A signature should be useful only in one context. For this purpose, we follow a convention dictating the format of signed messages. The first fields of a signed message must look like::
diff --git a/raiden_contracts/constants.py b/raiden_contracts/constants.py
index 59df68f1a..774457e9d 100644
--- a/raiden_contracts/constants.py
+++ b/raiden_contracts/constants.py
@@ -23,6 +23,7 @@
 CONTRACT_SERVICE_REGISTRY = "ServiceRegistry"
 CONTRACT_USER_DEPOSIT = "UserDeposit"
 CONTRACT_ONE_TO_N = "OneToN"
+CONTRACT_DEPOSIT = "Deposit"
 
 # Timeouts
 TEST_SETTLE_TIMEOUT_MIN = 5
@@ -51,6 +52,9 @@
 # EndpointRegistry
 EVENT_ADDRESS_REGISTERED = "AddressRegistered"
 
+# ServiceRegistry
+EVENT_REGISTERED_SERVICE = "RegisteredService"
+
 
 class ChannelEvent(str, Enum):
     OPENED = "ChannelOpened"
diff --git a/raiden_contracts/data/contracts.json b/raiden_contracts/data/contracts.json
index 537248c49..c2f6670dd 100644
--- a/raiden_contracts/data/contracts.json
+++ b/raiden_contracts/data/contracts.json
@@ -378,6 +378,88 @@
             "bin-runtime": "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             "metadata": "{\"compiler\":{\"version\":\"0.5.4+commit.9549d8ff\"},\"language\":\"Solidity\",\"output\":{\"abi\":[{\"constant\":true,\"inputs\":[],\"name\":\"name\",\"outputs\":[{\"name\":\"\",\"type\":\"string\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"constant\":false,\"inputs\":[{\"name\":\"_spender\",\"type\":\"address\"},{\"name\":\"_value\",\"type\":\"uint256\"}],\"name\":\"approve\",\"outputs\":[{\"name\":\"success\",\"type\":\"bool\"}],\"payable\":false,\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"constant\":true,\"inputs\":[],\"name\":\"totalSupply\",\"outputs\":[{\"name\":\"supply\",\"type\":\"uint256\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"constant\":true,\"inputs\":[],\"name\":\"multiplier\",\"outputs\":[{\"name\":\"\",\"type\":\"uint256\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"constant\":false,\"inputs\":[{\"name\":\"_from\",\"type\":\"address\"},{\"name\":\"_to\",\"type\":\"address\"},{\"name\":\"_value\",\"type\":\"uint256\"}],\"name\":\"transferFrom\",\"outputs\":[{\"name\":\"success\",\"type\":\"bool\"}],\"payable\":false,\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"constant\":true,\"inputs\":[{\"name\":\"\",\"type\":\"address\"}],\"name\":\"balances\",\"outputs\":[{\"name\":\"\",\"type\":\"uint256\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"constant\":true,\"inputs\":[],\"name\":\"decimals\",\"outputs\":[{\"name\":\"decimals\",\"type\":\"uint8\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"constant\":true,\"inputs\":[],\"name\":\"_decimals\",\"outputs\":[{\"name\":\"\",\"type\":\"uint8\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"constant\":false,\"inputs\":[],\"name\":\"transferFunds\",\"outputs\":[],\"payable\":false,\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"constant\":true,\"inputs\":[],\"name\":\"version\",\"outputs\":[{\"name\":\"\",\"type\":\"string\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"constant\":true,\"inputs\":[{\"name\":\"_owner\",\"type\":\"address\"}],\"name\":\"balanceOf\",\"outputs\":[{\"name\":\"balance\",\"type\":\"uint256\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"constant\":true,\"inputs\":[],\"name\":\"owner_address\",\"outputs\":[{\"name\":\"\",\"type\":\"address\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"constant\":true,\"inputs\":[],\"name\":\"symbol\",\"outputs\":[{\"name\":\"\",\"type\":\"string\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"constant\":false,\"inputs\":[{\"name\":\"num\",\"type\":\"uint256\"}],\"name\":\"mint\",\"outputs\":[],\"payable\":false,\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"constant\":false,\"inputs\":[{\"name\":\"_to\",\"type\":\"address\"},{\"name\":\"_value\",\"type\":\"uint256\"}],\"name\":\"transfer\",\"outputs\":[{\"name\":\"success\",\"type\":\"bool\"}],\"payable\":false,\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"constant\":false,\"inputs\":[{\"name\":\"num\",\"type\":\"uint256\"},{\"name\":\"target\",\"type\":\"address\"}],\"name\":\"mintFor\",\"outputs\":[],\"payable\":false,\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"constant\":true,\"inputs\":[{\"name\":\"_owner\",\"type\":\"address\"},{\"name\":\"_spender\",\"type\":\"address\"}],\"name\":\"allowance\",\"outputs\":[{\"name\":\"remaining\",\"type\":\"uint256\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"name\":\"initial_supply\",\"type\":\"uint256\"},{\"name\":\"decimal_units\",\"type\":\"uint8\"},{\"name\":\"token_name\",\"type\":\"string\"},{\"name\":\"token_symbol\",\"type\":\"string\"}],\"payable\":false,\"stateMutability\":\"nonpayable\",\"type\":\"constructor\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":true,\"name\":\"_to\",\"type\":\"address\"},{\"indexed\":true,\"name\":\"_num\",\"type\":\"uint256\"}],\"name\":\"Minted\",\"type\":\"event\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":true,\"name\":\"_from\",\"type\":\"address\"},{\"indexed\":true,\"name\":\"_to\",\"type\":\"address\"},{\"indexed\":false,\"name\":\"_value\",\"type\":\"uint256\"}],\"name\":\"Transfer\",\"type\":\"event\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":true,\"name\":\"_owner\",\"type\":\"address\"},{\"indexed\":true,\"name\":\"_spender\",\"type\":\"address\"},{\"indexed\":false,\"name\":\"_value\",\"type\":\"uint256\"}],\"name\":\"Approval\",\"type\":\"event\"}],\"devdoc\":{\"methods\":{\"constructor\":{\"details\":\"Contract constructor function.\",\"params\":{\"decimal_units\":\"Number of token decimals.\",\"initial_supply\":\"Initial supply of tokens.\",\"token_name\":\"Token name for display.\",\"token_symbol\":\"Token symbol.\"}}},\"title\":\"CustomToken\"},\"userdoc\":{\"methods\":{\"mint(uint256)\":{\"notice\":\"Allows `num` tokens to be minted and assigned to `msg.sender`\"},\"mintFor(uint256,address)\":{\"notice\":\"Allows `num` tokens to be minted and assigned to `target`\"},\"transferFunds()\":{\"notice\":\"Transfers the collected ETH to the contract owner.\"}}}},\"settings\":{\"compilationTarget\":{\"data/source/test/CustomToken.sol\":\"CustomToken\"},\"evmVersion\":\"byzantium\",\"libraries\":{},\"optimizer\":{\"enabled\":false,\"runs\":200},\"remappings\":[\":.=.\",\":lib=data/source/lib\",\":raiden=data/source/raiden\",\":services=data/source/services\",\":test=data/source/test\"]},\"sources\":{\"data/source/raiden/Token.sol\":{\"keccak256\":\"0x41b40819d7f6714550c742f48ce46daeb97255c08bc56e83bb9fde4fbe14c3b4\",\"urls\":[\"bzzr://a20e2bea336fb01584cf4dc80e77bb8db3c33666f77f840fd58559116849ae4b\"]},\"data/source/test/CustomToken.sol\":{\"keccak256\":\"0x828c5089b318fe59ddc7303d8506463c2d90521fcc80b01f6ffe624e16b4c80d\",\"urls\":[\"bzzr://c83d6ffe3b0745c38d57718c1d7bc1b5b1b0bfaa8025a80aa3151b52241e45b2\"]},\"data/source/test/StandardToken.sol\":{\"keccak256\":\"0x08ba7a6582ab0636410d27fab1dbed11c71200176a65779c35b9b79e55c84b9a\",\"urls\":[\"bzzr://b44fb2f169d6d4cab715780abbc885f9e80bccf829a106b9a65aa53512b6aff3\"]}},\"version\":1}"
         },
+        "Deposit": {
+            "abi": [
+                {
+                    "constant": false,
+                    "inputs": [
+                        {
+                            "name": "_to",
+                            "type": "address"
+                        }
+                    ],
+                    "name": "withdraw",
+                    "outputs": [],
+                    "payable": false,
+                    "stateMutability": "nonpayable",
+                    "type": "function"
+                },
+                {
+                    "constant": true,
+                    "inputs": [],
+                    "name": "release_at",
+                    "outputs": [
+                        {
+                            "name": "",
+                            "type": "uint256"
+                        }
+                    ],
+                    "payable": false,
+                    "stateMutability": "view",
+                    "type": "function"
+                },
+                {
+                    "constant": true,
+                    "inputs": [],
+                    "name": "withdrawer",
+                    "outputs": [
+                        {
+                            "name": "",
+                            "type": "address"
+                        }
+                    ],
+                    "payable": false,
+                    "stateMutability": "view",
+                    "type": "function"
+                },
+                {
+                    "constant": true,
+                    "inputs": [],
+                    "name": "token",
+                    "outputs": [
+                        {
+                            "name": "",
+                            "type": "address"
+                        }
+                    ],
+                    "payable": false,
+                    "stateMutability": "view",
+                    "type": "function"
+                },
+                {
+                    "inputs": [
+                        {
+                            "name": "_token",
+                            "type": "address"
+                        },
+                        {
+                            "name": "_release_at",
+                            "type": "uint256"
+                        },
+                        {
+                            "name": "_withdrawer",
+                            "type": "address"
+                        }
+                    ],
+                    "payable": false,
+                    "stateMutability": "nonpayable",
+                    "type": "constructor"
+                }
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+            "metadata": "{\"compiler\":{\"version\":\"0.5.4+commit.9549d8ff\"},\"language\":\"Solidity\",\"output\":{\"abi\":[{\"constant\":false,\"inputs\":[{\"name\":\"_to\",\"type\":\"address\"}],\"name\":\"withdraw\",\"outputs\":[],\"payable\":false,\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"constant\":true,\"inputs\":[],\"name\":\"release_at\",\"outputs\":[{\"name\":\"\",\"type\":\"uint256\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"constant\":true,\"inputs\":[],\"name\":\"withdrawer\",\"outputs\":[{\"name\":\"\",\"type\":\"address\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"constant\":true,\"inputs\":[],\"name\":\"token\",\"outputs\":[{\"name\":\"\",\"type\":\"address\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"name\":\"_token\",\"type\":\"address\"},{\"name\":\"_release_at\",\"type\":\"uint256\"},{\"name\":\"_withdrawer\",\"type\":\"address\"}],\"payable\":false,\"stateMutability\":\"nonpayable\",\"type\":\"constructor\"}],\"devdoc\":{\"methods\":{\"constructor\":{\"params\":{\"_release_at\":\"The timestap after which the withdrawer can withdraw the deposit.\",\"_token\":\"The address of the ERC20 token contract where the deposit is accounted.\",\"_withdrawer\":\"The address that can withdraw the deposit after the release time.\"}},\"withdraw(address)\":{\"params\":{\"_to\":\"The address where the withdrawn tokens should go.\"}}}},\"userdoc\":{\"methods\":{\"withdraw(address)\":{\"notice\":\"Withdraws the tokens that have been deposited. Only `withdrawer` can call this.\"}}}},\"settings\":{\"compilationTarget\":{\"data/source/services/ServiceRegistry.sol\":\"Deposit\"},\"evmVersion\":\"byzantium\",\"libraries\":{},\"optimizer\":{\"enabled\":false,\"runs\":200},\"remappings\":[\":.=.\",\":lib=data/source/lib\",\":raiden=data/source/raiden\",\":services=data/source/services\",\":test=data/source/test\"]},\"sources\":{\"data/source/raiden/Token.sol\":{\"keccak256\":\"0x41b40819d7f6714550c742f48ce46daeb97255c08bc56e83bb9fde4fbe14c3b4\",\"urls\":[\"bzzr://a20e2bea336fb01584cf4dc80e77bb8db3c33666f77f840fd58559116849ae4b\"]},\"data/source/raiden/Utils.sol\":{\"keccak256\":\"0x602fd914e5644696d3c5d42e3a39fe6f16e7ddcc93f8864aa7e368a70cb56d0b\",\"urls\":[\"bzzr://b884810b9826074efb212a825d33409c35d9a159681690e821da3643052be3d1\"]},\"data/source/services/ServiceRegistry.sol\":{\"keccak256\":\"0x2566b42f123826aed4c039c50d6fbe3433e43461e0b7b8d8821c02bacfd34907\",\"urls\":[\"bzzr://16b6b8a940b5dedee7489f41faaad98ffafa76e738e828964d1d760fca7c355d\"]}},\"version\":1}"
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         "ECVerify": {
             "abi": [],
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@@ -966,9 +1048,9 @@
                     "type": "event"
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-            "metadata": "{\"compiler\":{\"version\":\"0.5.4+commit.9549d8ff\"},\"language\":\"Solidity\",\"output\":{\"abi\":[{\"constant\":false,\"inputs\":[{\"name\":\"channel_identifier\",\"type\":\"uint256\"},{\"name\":\"token_network_address\",\"type\":\"address\"},{\"name\":\"closing_participant\",\"type\":\"address\"},{\"name\":\"non_closing_participant\",\"type\":\"address\"}],\"name\":\"claimReward\",\"outputs\":[{\"name\":\"\",\"type\":\"bool\"}],\"payable\":false,\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"constant\":true,\"inputs\":[],\"name\":\"user_deposit\",\"outputs\":[{\"name\":\"\",\"type\":\"address\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"constant\":true,\"inputs\":[{\"name\":\"closed_at_block\",\"type\":\"uint256\"},{\"name\":\"settle_timeout\",\"type\":\"uint256\"},{\"name\":\"participant1\",\"type\":\"address\"},{\"name\":\"participant2\",\"type\":\"address\"},{\"name\":\"monitoring_service_address\",\"type\":\"address\"}],\"name\":\"firstBlockAllowedToMonitor\",\"outputs\":[{\"name\":\"\",\"type\":\"uint256\"}],\"payable\":false,\"stateMutability\":\"pure\",\"type\":\"function\"},{\"constant\":true,\"inputs\":[{\"name\":\"contract_address\",\"type\":\"address\"}],\"name\":\"contractExists\",\"outputs\":[{\"name\":\"\",\"type\":\"bool\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"constant\":true,\"inputs\":[],\"name\":\"service_registry\",\"outputs\":[{\"name\":\"\",\"type\":\"address\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"constant\":false,\"inputs\":[{\"name\":\"closing_participant\",\"type\":\"address\"},{\"name\":\"non_closing_participant\",\"type\":\"address\"},{\"name\":\"balance_hash\",\"type\":\"bytes32\"},{\"name\":\"nonce\",\"type\":\"uint256\"},{\"name\":\"additional_hash\",\"type\":\"bytes32\"},{\"name\":\"closing_signature\",\"type\":\"bytes\"},{\"name\":\"non_closing_signature\",\"type\":\"bytes\"},{\"name\":\"reward_amount\",\"type\":\"uint256\"},{\"name\":\"token_network_address\",\"type\":\"address\"},{\"name\":\"reward_proof_signature\",\"type\":\"bytes\"}],\"name\":\"monitor\",\"outputs\":[],\"payable\":false,\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"constant\":true,\"inputs\":[],\"name\":\"token\",\"outputs\":[{\"name\":\"\",\"type\":\"address\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"name\":\"_token_address\",\"type\":\"address\"},{\"name\":\"_service_registry_address\",\"type\":\"address\"},{\"name\":\"_udc_address\",\"type\":\"address\"}],\"payable\":false,\"stateMutability\":\"nonpayable\",\"type\":\"constructor\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":false,\"name\":\"token_network_address\",\"type\":\"address\"},{\"indexed\":false,\"name\":\"channel_identifier\",\"type\":\"uint256\"},{\"indexed\":false,\"name\":\"reward_amount\",\"type\":\"uint256\"},{\"indexed\":true,\"name\":\"nonce\",\"type\":\"uint256\"},{\"indexed\":true,\"name\":\"ms_address\",\"type\":\"address\"},{\"indexed\":true,\"name\":\"raiden_node_address\",\"type\":\"address\"}],\"name\":\"NewBalanceProofReceived\",\"type\":\"event\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":true,\"name\":\"ms_address\",\"type\":\"address\"},{\"indexed\":false,\"name\":\"amount\",\"type\":\"uint256\"},{\"indexed\":true,\"name\":\"reward_identifier\",\"type\":\"bytes32\"}],\"name\":\"RewardClaimed\",\"type\":\"event\"}],\"devdoc\":{\"methods\":{\"claimReward(uint256,address,address,address)\":{\"params\":{\"closing_participant\":\"Address of the participant of the channel that called close\",\"non_closing_participant\":\"The other participant of the channel\",\"token_network_address\":\"Address of the Token Network in which the channel exists\"}},\"constructor\":{\"params\":{\"_service_registry_address\":\"The address of the ServiceRegistry contract\",\"_token_address\":\"The address of the token to use for rewards\"}},\"contractExists(address)\":{\"params\":{\"contract_address\":\"The address to check whether a contract is deployed or not\"},\"return\":\"True if a contract exists, false otherwise\"},\"monitor(address,address,bytes32,uint256,bytes32,bytes,bytes,uint256,address,bytes)\":{\"params\":{\"nonce\":\"Strictly monotonic value used to order BPs omitting PB specific params, since these will not be provided in the future\",\"reward_amount\":\"Amount of tokens to be rewarded\",\"reward_proof_signature\":\"The signature of the signed reward proof\",\"token_network_address\":\"Address of the Token Network in which the channel being monitored exists.\"}}}},\"userdoc\":{\"methods\":{\"claimReward(uint256,address,address,address)\":{\"notice\":\"Called after a monitored channel is settled in order for MS to claim the reward Can be called once per settled channel by everyone on behalf of MS\"},\"constructor\":\"Set the default values for the smart contract\",\"contractExists(address)\":{\"notice\":\"Check if a contract exists\"},\"monitor(address,address,bytes32,uint256,bytes32,bytes,bytes,uint256,address,bytes)\":{\"notice\":\"Called by a registered MS, when providing a new balance proof to a monitored channel. Can be called multiple times by different registered MSs as long as the BP provided is newer than the current newest registered BP.\"}}}},\"settings\":{\"compilationTarget\":{\"data/source/services/MonitoringService.sol\":\"MonitoringService\"},\"evmVersion\":\"byzantium\",\"libraries\":{},\"optimizer\":{\"enabled\":false,\"runs\":200},\"remappings\":[\":.=.\",\":lib=data/source/lib\",\":raiden=data/source/raiden\",\":services=data/source/services\",\":test=data/source/test\"]},\"sources\":{\"data/source/lib/ECVerify.sol\":{\"keccak256\":\"0x8bb402baa478eb53252d77b63982e12685adda290cf4dfa1d8f510284f8df3e9\",\"urls\":[\"bzzr://474c3db1bb54bb831c32eb2ab67a0e870489994bd4d4b8a8fa24b54935211d43\"]},\"data/source/raiden/SecretRegistry.sol\":{\"keccak256\":\"0xb8078bc048ccdeb7c58026754f22fc378baf3b24090db0f17d10bda6cd4951b4\",\"urls\":[\"bzzr://f7a072330393a85a6a274ef526ac2ca0f8eb217bf5f48c18b3080be7ac3a7ede\"]},\"data/source/raiden/Token.sol\":{\"keccak256\":\"0x41b40819d7f6714550c742f48ce46daeb97255c08bc56e83bb9fde4fbe14c3b4\",\"urls\":[\"bzzr://a20e2bea336fb01584cf4dc80e77bb8db3c33666f77f840fd58559116849ae4b\"]},\"data/source/raiden/TokenNetwork.sol\":{\"keccak256\":\"0xe8abde4af3b77ab25167f3bd056ce1acd8d16fa2aec09861b41b118e038ce0f5\",\"urls\":[\"bzzr://1161945467e0f0c7cc39df9b33450d88f35fa1b4d76306030f49fbdd481c4326\"]},\"data/source/raiden/Utils.sol\":{\"keccak256\":\"0x602fd914e5644696d3c5d42e3a39fe6f16e7ddcc93f8864aa7e368a70cb56d0b\",\"urls\":[\"bzzr://b884810b9826074efb212a825d33409c35d9a159681690e821da3643052be3d1\"]},\"data/source/services/MonitoringService.sol\":{\"keccak256\":\"0x52f6eb0877d929cf69342fb3c0cd1e455d9804acf15bbc5be8ce1b6580b9a9a3\",\"urls\":[\"bzzr://e5aac1ffdf3ef3d3bf5d8c491312336b3eff7153d1cdb74eedf873d6cd88f204\"]},\"data/source/services/ServiceRegistry.sol\":{\"keccak256\":\"0x69d05c038fa9777ab94296c12593ab4c341c858979b448be1338d4708db26192\",\"urls\":[\"bzzr://bf06e95a4a3deb2599a3e2cf6c5111c965ed610c622509580c5a5467b6eadf3e\"]},\"data/source/services/UserDeposit.sol\":{\"keccak256\":\"0x23fae922fe184ab0e4a1a25349f7ade63103c298625bc29c4f1b285619d054f0\",\"urls\":[\"bzzr://42777a151afd25154d5adfc875921c00261cae360b676cad959e62829b2fe5b6\"]}},\"version\":1}"
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+            "metadata": "{\"compiler\":{\"version\":\"0.5.4+commit.9549d8ff\"},\"language\":\"Solidity\",\"output\":{\"abi\":[{\"constant\":false,\"inputs\":[{\"name\":\"channel_identifier\",\"type\":\"uint256\"},{\"name\":\"token_network_address\",\"type\":\"address\"},{\"name\":\"closing_participant\",\"type\":\"address\"},{\"name\":\"non_closing_participant\",\"type\":\"address\"}],\"name\":\"claimReward\",\"outputs\":[{\"name\":\"\",\"type\":\"bool\"}],\"payable\":false,\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"constant\":true,\"inputs\":[],\"name\":\"user_deposit\",\"outputs\":[{\"name\":\"\",\"type\":\"address\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"constant\":true,\"inputs\":[{\"name\":\"closed_at_block\",\"type\":\"uint256\"},{\"name\":\"settle_timeout\",\"type\":\"uint256\"},{\"name\":\"participant1\",\"type\":\"address\"},{\"name\":\"participant2\",\"type\":\"address\"},{\"name\":\"monitoring_service_address\",\"type\":\"address\"}],\"name\":\"firstBlockAllowedToMonitor\",\"outputs\":[{\"name\":\"\",\"type\":\"uint256\"}],\"payable\":false,\"stateMutability\":\"pure\",\"type\":\"function\"},{\"constant\":true,\"inputs\":[{\"name\":\"contract_address\",\"type\":\"address\"}],\"name\":\"contractExists\",\"outputs\":[{\"name\":\"\",\"type\":\"bool\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"constant\":true,\"inputs\":[],\"name\":\"service_registry\",\"outputs\":[{\"name\":\"\",\"type\":\"address\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"constant\":false,\"inputs\":[{\"name\":\"closing_participant\",\"type\":\"address\"},{\"name\":\"non_closing_participant\",\"type\":\"address\"},{\"name\":\"balance_hash\",\"type\":\"bytes32\"},{\"name\":\"nonce\",\"type\":\"uint256\"},{\"name\":\"additional_hash\",\"type\":\"bytes32\"},{\"name\":\"closing_signature\",\"type\":\"bytes\"},{\"name\":\"non_closing_signature\",\"type\":\"bytes\"},{\"name\":\"reward_amount\",\"type\":\"uint256\"},{\"name\":\"token_network_address\",\"type\":\"address\"},{\"name\":\"reward_proof_signature\",\"type\":\"bytes\"}],\"name\":\"monitor\",\"outputs\":[],\"payable\":false,\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"constant\":true,\"inputs\":[],\"name\":\"token\",\"outputs\":[{\"name\":\"\",\"type\":\"address\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"name\":\"_token_address\",\"type\":\"address\"},{\"name\":\"_service_registry_address\",\"type\":\"address\"},{\"name\":\"_udc_address\",\"type\":\"address\"}],\"payable\":false,\"stateMutability\":\"nonpayable\",\"type\":\"constructor\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":false,\"name\":\"token_network_address\",\"type\":\"address\"},{\"indexed\":false,\"name\":\"channel_identifier\",\"type\":\"uint256\"},{\"indexed\":false,\"name\":\"reward_amount\",\"type\":\"uint256\"},{\"indexed\":true,\"name\":\"nonce\",\"type\":\"uint256\"},{\"indexed\":true,\"name\":\"ms_address\",\"type\":\"address\"},{\"indexed\":true,\"name\":\"raiden_node_address\",\"type\":\"address\"}],\"name\":\"NewBalanceProofReceived\",\"type\":\"event\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":true,\"name\":\"ms_address\",\"type\":\"address\"},{\"indexed\":false,\"name\":\"amount\",\"type\":\"uint256\"},{\"indexed\":true,\"name\":\"reward_identifier\",\"type\":\"bytes32\"}],\"name\":\"RewardClaimed\",\"type\":\"event\"}],\"devdoc\":{\"methods\":{\"claimReward(uint256,address,address,address)\":{\"params\":{\"closing_participant\":\"Address of the participant of the channel that called close\",\"non_closing_participant\":\"The other participant of the channel\",\"token_network_address\":\"Address of the Token Network in which the channel exists\"}},\"constructor\":{\"params\":{\"_service_registry_address\":\"The address of the ServiceRegistry contract\",\"_token_address\":\"The address of the token to use for rewards\"}},\"contractExists(address)\":{\"params\":{\"contract_address\":\"The address to check whether a contract is deployed or not\"},\"return\":\"True if a contract exists, false otherwise\"},\"monitor(address,address,bytes32,uint256,bytes32,bytes,bytes,uint256,address,bytes)\":{\"params\":{\"nonce\":\"Strictly monotonic value used to order BPs omitting PB specific params, since these will not be provided in the future\",\"reward_amount\":\"Amount of tokens to be rewarded\",\"reward_proof_signature\":\"The signature of the signed reward proof\",\"token_network_address\":\"Address of the Token Network in which the channel being monitored exists.\"}}}},\"userdoc\":{\"methods\":{\"claimReward(uint256,address,address,address)\":{\"notice\":\"Called after a monitored channel is settled in order for MS to claim the reward Can be called once per settled channel by everyone on behalf of MS\"},\"constructor\":\"Set the default values for the smart contract\",\"contractExists(address)\":{\"notice\":\"Check if a contract exists\"},\"monitor(address,address,bytes32,uint256,bytes32,bytes,bytes,uint256,address,bytes)\":{\"notice\":\"Called by a registered MS, when providing a new balance proof to a monitored channel. Can be called multiple times by different registered MSs as long as the BP provided is newer than the current newest registered BP.\"}}}},\"settings\":{\"compilationTarget\":{\"data/source/services/MonitoringService.sol\":\"MonitoringService\"},\"evmVersion\":\"byzantium\",\"libraries\":{},\"optimizer\":{\"enabled\":false,\"runs\":200},\"remappings\":[\":.=.\",\":lib=data/source/lib\",\":raiden=data/source/raiden\",\":services=data/source/services\",\":test=data/source/test\"]},\"sources\":{\"data/source/lib/ECVerify.sol\":{\"keccak256\":\"0x8bb402baa478eb53252d77b63982e12685adda290cf4dfa1d8f510284f8df3e9\",\"urls\":[\"bzzr://474c3db1bb54bb831c32eb2ab67a0e870489994bd4d4b8a8fa24b54935211d43\"]},\"data/source/raiden/SecretRegistry.sol\":{\"keccak256\":\"0xb8078bc048ccdeb7c58026754f22fc378baf3b24090db0f17d10bda6cd4951b4\",\"urls\":[\"bzzr://f7a072330393a85a6a274ef526ac2ca0f8eb217bf5f48c18b3080be7ac3a7ede\"]},\"data/source/raiden/Token.sol\":{\"keccak256\":\"0x41b40819d7f6714550c742f48ce46daeb97255c08bc56e83bb9fde4fbe14c3b4\",\"urls\":[\"bzzr://a20e2bea336fb01584cf4dc80e77bb8db3c33666f77f840fd58559116849ae4b\"]},\"data/source/raiden/TokenNetwork.sol\":{\"keccak256\":\"0xe8abde4af3b77ab25167f3bd056ce1acd8d16fa2aec09861b41b118e038ce0f5\",\"urls\":[\"bzzr://1161945467e0f0c7cc39df9b33450d88f35fa1b4d76306030f49fbdd481c4326\"]},\"data/source/raiden/Utils.sol\":{\"keccak256\":\"0x602fd914e5644696d3c5d42e3a39fe6f16e7ddcc93f8864aa7e368a70cb56d0b\",\"urls\":[\"bzzr://b884810b9826074efb212a825d33409c35d9a159681690e821da3643052be3d1\"]},\"data/source/services/MonitoringService.sol\":{\"keccak256\":\"0x52f6eb0877d929cf69342fb3c0cd1e455d9804acf15bbc5be8ce1b6580b9a9a3\",\"urls\":[\"bzzr://e5aac1ffdf3ef3d3bf5d8c491312336b3eff7153d1cdb74eedf873d6cd88f204\"]},\"data/source/services/ServiceRegistry.sol\":{\"keccak256\":\"0x2566b42f123826aed4c039c50d6fbe3433e43461e0b7b8d8821c02bacfd34907\",\"urls\":[\"bzzr://16b6b8a940b5dedee7489f41faaad98ffafa76e738e828964d1d760fca7c355d\"]},\"data/source/services/UserDeposit.sol\":{\"keccak256\":\"0x23fae922fe184ab0e4a1a25349f7ade63103c298625bc29c4f1b285619d054f0\",\"urls\":[\"bzzr://42777a151afd25154d5adfc875921c00261cae360b676cad959e62829b2fe5b6\"]}},\"version\":1}"
         },
         "MonitoringServiceInternalsTest": {
             "abi": [
@@ -1324,9 +1406,9 @@
                     "type": "event"
                 }
             ],
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-            "metadata": "{\"compiler\":{\"version\":\"0.5.4+commit.9549d8ff\"},\"language\":\"Solidity\",\"output\":{\"abi\":[{\"constant\":false,\"inputs\":[{\"name\":\"channel_identifier\",\"type\":\"uint256\"},{\"name\":\"token_network_address\",\"type\":\"address\"},{\"name\":\"closing_participant\",\"type\":\"address\"},{\"name\":\"non_closing_participant\",\"type\":\"address\"}],\"name\":\"claimReward\",\"outputs\":[{\"name\":\"\",\"type\":\"bool\"}],\"payable\":false,\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"constant\":true,\"inputs\":[{\"name\":\"monitoring_service_contract_address\",\"type\":\"address\"},{\"name\":\"chain_id\",\"type\":\"uint256\"},{\"name\":\"non_closing_signature\",\"type\":\"bytes\"},{\"name\":\"reward_amount\",\"type\":\"uint256\"},{\"name\":\"signature\",\"type\":\"bytes\"}],\"name\":\"recoverAddressFromRewardProofPublic\",\"outputs\":[{\"name\":\"signature_address\",\"type\":\"address\"}],\"payable\":false,\"stateMutability\":\"pure\",\"type\":\"function\"},{\"constant\":true,\"inputs\":[],\"name\":\"user_deposit\",\"outputs\":[{\"name\":\"\",\"type\":\"address\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"constant\":true,\"inputs\":[{\"name\":\"closed_at_block\",\"type\":\"uint256\"},{\"name\":\"settle_timeout\",\"type\":\"uint256\"},{\"name\":\"participant1\",\"type\":\"address\"},{\"name\":\"participant2\",\"type\":\"address\"},{\"name\":\"monitoring_service_address\",\"type\":\"address\"}],\"name\":\"firstBlockAllowedToMonitor\",\"outputs\":[{\"name\":\"\",\"type\":\"uint256\"}],\"payable\":false,\"stateMutability\":\"pure\",\"type\":\"function\"},{\"constant\":false,\"inputs\":[{\"name\":\"token_network_address\",\"type\":\"address\"},{\"name\":\"closing_participant\",\"type\":\"address\"},{\"name\":\"non_closing_participant\",\"type\":\"address\"},{\"name\":\"reward_amount\",\"type\":\"uint256\"},{\"name\":\"nonce\",\"type\":\"uint256\"},{\"name\":\"monitoring_service_address\",\"type\":\"address\"},{\"name\":\"non_closing_signature\",\"type\":\"bytes\"},{\"name\":\"reward_proof_signature\",\"type\":\"bytes\"}],\"name\":\"updateRewardPublic\",\"outputs\":[],\"payable\":false,\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"constant\":true,\"inputs\":[{\"name\":\"contract_address\",\"type\":\"address\"}],\"name\":\"contractExists\",\"outputs\":[{\"name\":\"\",\"type\":\"bool\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"constant\":true,\"inputs\":[],\"name\":\"service_registry\",\"outputs\":[{\"name\":\"\",\"type\":\"address\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"constant\":false,\"inputs\":[{\"name\":\"closing_participant\",\"type\":\"address\"},{\"name\":\"non_closing_participant\",\"type\":\"address\"},{\"name\":\"balance_hash\",\"type\":\"bytes32\"},{\"name\":\"nonce\",\"type\":\"uint256\"},{\"name\":\"additional_hash\",\"type\":\"bytes32\"},{\"name\":\"closing_signature\",\"type\":\"bytes\"},{\"name\":\"non_closing_signature\",\"type\":\"bytes\"},{\"name\":\"reward_amount\",\"type\":\"uint256\"},{\"name\":\"token_network_address\",\"type\":\"address\"},{\"name\":\"reward_proof_signature\",\"type\":\"bytes\"}],\"name\":\"monitor\",\"outputs\":[],\"payable\":false,\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"constant\":true,\"inputs\":[{\"name\":\"reward_identifier\",\"type\":\"bytes32\"}],\"name\":\"rewardNonce\",\"outputs\":[{\"name\":\"nonce\",\"type\":\"uint256\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"constant\":true,\"inputs\":[],\"name\":\"token\",\"outputs\":[{\"name\":\"\",\"type\":\"address\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"name\":\"_token_address\",\"type\":\"address\"},{\"name\":\"_service_registry_address\",\"type\":\"address\"},{\"name\":\"_udc_address\",\"type\":\"address\"}],\"payable\":false,\"stateMutability\":\"nonpayable\",\"type\":\"constructor\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":false,\"name\":\"token_network_address\",\"type\":\"address\"},{\"indexed\":false,\"name\":\"channel_identifier\",\"type\":\"uint256\"},{\"indexed\":false,\"name\":\"reward_amount\",\"type\":\"uint256\"},{\"indexed\":true,\"name\":\"nonce\",\"type\":\"uint256\"},{\"indexed\":true,\"name\":\"ms_address\",\"type\":\"address\"},{\"indexed\":true,\"name\":\"raiden_node_address\",\"type\":\"address\"}],\"name\":\"NewBalanceProofReceived\",\"type\":\"event\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":true,\"name\":\"ms_address\",\"type\":\"address\"},{\"indexed\":false,\"name\":\"amount\",\"type\":\"uint256\"},{\"indexed\":true,\"name\":\"reward_identifier\",\"type\":\"bytes32\"}],\"name\":\"RewardClaimed\",\"type\":\"event\"}],\"devdoc\":{\"methods\":{\"claimReward(uint256,address,address,address)\":{\"params\":{\"closing_participant\":\"Address of the participant of the channel that called close\",\"non_closing_participant\":\"The other participant of the channel\",\"token_network_address\":\"Address of the Token Network in which the channel exists\"}},\"contractExists(address)\":{\"params\":{\"contract_address\":\"The address to check whether a contract is deployed or not\"},\"return\":\"True if a contract exists, false otherwise\"},\"monitor(address,address,bytes32,uint256,bytes32,bytes,bytes,uint256,address,bytes)\":{\"params\":{\"nonce\":\"Strictly monotonic value used to order BPs omitting PB specific params, since these will not be provided in the future\",\"reward_amount\":\"Amount of tokens to be rewarded\",\"reward_proof_signature\":\"The signature of the signed reward proof\",\"token_network_address\":\"Address of the Token Network in which the channel being monitored exists.\"}}}},\"userdoc\":{\"methods\":{\"claimReward(uint256,address,address,address)\":{\"notice\":\"Called after a monitored channel is settled in order for MS to claim the reward Can be called once per settled channel by everyone on behalf of MS\"},\"contractExists(address)\":{\"notice\":\"Check if a contract exists\"},\"monitor(address,address,bytes32,uint256,bytes32,bytes,bytes,uint256,address,bytes)\":{\"notice\":\"Called by a registered MS, when providing a new balance proof to a monitored channel. Can be called multiple times by different registered MSs as long as the BP provided is newer than the current newest registered BP.\"}}}},\"settings\":{\"compilationTarget\":{\"data/source/test/MonitoringServiceInternalsTest.sol\":\"MonitoringServiceInternalsTest\"},\"evmVersion\":\"byzantium\",\"libraries\":{},\"optimizer\":{\"enabled\":false,\"runs\":200},\"remappings\":[\":.=.\",\":lib=data/source/lib\",\":raiden=data/source/raiden\",\":services=data/source/services\",\":test=data/source/test\"]},\"sources\":{\"data/source/lib/ECVerify.sol\":{\"keccak256\":\"0x8bb402baa478eb53252d77b63982e12685adda290cf4dfa1d8f510284f8df3e9\",\"urls\":[\"bzzr://474c3db1bb54bb831c32eb2ab67a0e870489994bd4d4b8a8fa24b54935211d43\"]},\"data/source/raiden/SecretRegistry.sol\":{\"keccak256\":\"0xb8078bc048ccdeb7c58026754f22fc378baf3b24090db0f17d10bda6cd4951b4\",\"urls\":[\"bzzr://f7a072330393a85a6a274ef526ac2ca0f8eb217bf5f48c18b3080be7ac3a7ede\"]},\"data/source/raiden/Token.sol\":{\"keccak256\":\"0x41b40819d7f6714550c742f48ce46daeb97255c08bc56e83bb9fde4fbe14c3b4\",\"urls\":[\"bzzr://a20e2bea336fb01584cf4dc80e77bb8db3c33666f77f840fd58559116849ae4b\"]},\"data/source/raiden/TokenNetwork.sol\":{\"keccak256\":\"0xe8abde4af3b77ab25167f3bd056ce1acd8d16fa2aec09861b41b118e038ce0f5\",\"urls\":[\"bzzr://1161945467e0f0c7cc39df9b33450d88f35fa1b4d76306030f49fbdd481c4326\"]},\"data/source/raiden/Utils.sol\":{\"keccak256\":\"0x602fd914e5644696d3c5d42e3a39fe6f16e7ddcc93f8864aa7e368a70cb56d0b\",\"urls\":[\"bzzr://b884810b9826074efb212a825d33409c35d9a159681690e821da3643052be3d1\"]},\"data/source/services/MonitoringService.sol\":{\"keccak256\":\"0x52f6eb0877d929cf69342fb3c0cd1e455d9804acf15bbc5be8ce1b6580b9a9a3\",\"urls\":[\"bzzr://e5aac1ffdf3ef3d3bf5d8c491312336b3eff7153d1cdb74eedf873d6cd88f204\"]},\"data/source/services/ServiceRegistry.sol\":{\"keccak256\":\"0x69d05c038fa9777ab94296c12593ab4c341c858979b448be1338d4708db26192\",\"urls\":[\"bzzr://bf06e95a4a3deb2599a3e2cf6c5111c965ed610c622509580c5a5467b6eadf3e\"]},\"data/source/services/UserDeposit.sol\":{\"keccak256\":\"0x23fae922fe184ab0e4a1a25349f7ade63103c298625bc29c4f1b285619d054f0\",\"urls\":[\"bzzr://42777a151afd25154d5adfc875921c00261cae360b676cad959e62829b2fe5b6\"]},\"data/source/test/MonitoringServiceInternalsTest.sol\":{\"keccak256\":\"0x76f01cee7a703d7d000d49699050a752243935308b6685856ab4a5c454119491\",\"urls\":[\"bzzr://4519ab40621884f999c122784b72e9e1082115331857a44393e1927301d67f09\"]}},\"version\":1}"
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+            "metadata": "{\"compiler\":{\"version\":\"0.5.4+commit.9549d8ff\"},\"language\":\"Solidity\",\"output\":{\"abi\":[{\"constant\":false,\"inputs\":[{\"name\":\"channel_identifier\",\"type\":\"uint256\"},{\"name\":\"token_network_address\",\"type\":\"address\"},{\"name\":\"closing_participant\",\"type\":\"address\"},{\"name\":\"non_closing_participant\",\"type\":\"address\"}],\"name\":\"claimReward\",\"outputs\":[{\"name\":\"\",\"type\":\"bool\"}],\"payable\":false,\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"constant\":true,\"inputs\":[{\"name\":\"monitoring_service_contract_address\",\"type\":\"address\"},{\"name\":\"chain_id\",\"type\":\"uint256\"},{\"name\":\"non_closing_signature\",\"type\":\"bytes\"},{\"name\":\"reward_amount\",\"type\":\"uint256\"},{\"name\":\"signature\",\"type\":\"bytes\"}],\"name\":\"recoverAddressFromRewardProofPublic\",\"outputs\":[{\"name\":\"signature_address\",\"type\":\"address\"}],\"payable\":false,\"stateMutability\":\"pure\",\"type\":\"function\"},{\"constant\":true,\"inputs\":[],\"name\":\"user_deposit\",\"outputs\":[{\"name\":\"\",\"type\":\"address\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"constant\":true,\"inputs\":[{\"name\":\"closed_at_block\",\"type\":\"uint256\"},{\"name\":\"settle_timeout\",\"type\":\"uint256\"},{\"name\":\"participant1\",\"type\":\"address\"},{\"name\":\"participant2\",\"type\":\"address\"},{\"name\":\"monitoring_service_address\",\"type\":\"address\"}],\"name\":\"firstBlockAllowedToMonitor\",\"outputs\":[{\"name\":\"\",\"type\":\"uint256\"}],\"payable\":false,\"stateMutability\":\"pure\",\"type\":\"function\"},{\"constant\":false,\"inputs\":[{\"name\":\"token_network_address\",\"type\":\"address\"},{\"name\":\"closing_participant\",\"type\":\"address\"},{\"name\":\"non_closing_participant\",\"type\":\"address\"},{\"name\":\"reward_amount\",\"type\":\"uint256\"},{\"name\":\"nonce\",\"type\":\"uint256\"},{\"name\":\"monitoring_service_address\",\"type\":\"address\"},{\"name\":\"non_closing_signature\",\"type\":\"bytes\"},{\"name\":\"reward_proof_signature\",\"type\":\"bytes\"}],\"name\":\"updateRewardPublic\",\"outputs\":[],\"payable\":false,\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"constant\":true,\"inputs\":[{\"name\":\"contract_address\",\"type\":\"address\"}],\"name\":\"contractExists\",\"outputs\":[{\"name\":\"\",\"type\":\"bool\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"constant\":true,\"inputs\":[],\"name\":\"service_registry\",\"outputs\":[{\"name\":\"\",\"type\":\"address\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"constant\":false,\"inputs\":[{\"name\":\"closing_participant\",\"type\":\"address\"},{\"name\":\"non_closing_participant\",\"type\":\"address\"},{\"name\":\"balance_hash\",\"type\":\"bytes32\"},{\"name\":\"nonce\",\"type\":\"uint256\"},{\"name\":\"additional_hash\",\"type\":\"bytes32\"},{\"name\":\"closing_signature\",\"type\":\"bytes\"},{\"name\":\"non_closing_signature\",\"type\":\"bytes\"},{\"name\":\"reward_amount\",\"type\":\"uint256\"},{\"name\":\"token_network_address\",\"type\":\"address\"},{\"name\":\"reward_proof_signature\",\"type\":\"bytes\"}],\"name\":\"monitor\",\"outputs\":[],\"payable\":false,\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"constant\":true,\"inputs\":[{\"name\":\"reward_identifier\",\"type\":\"bytes32\"}],\"name\":\"rewardNonce\",\"outputs\":[{\"name\":\"nonce\",\"type\":\"uint256\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"constant\":true,\"inputs\":[],\"name\":\"token\",\"outputs\":[{\"name\":\"\",\"type\":\"address\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"name\":\"_token_address\",\"type\":\"address\"},{\"name\":\"_service_registry_address\",\"type\":\"address\"},{\"name\":\"_udc_address\",\"type\":\"address\"}],\"payable\":false,\"stateMutability\":\"nonpayable\",\"type\":\"constructor\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":false,\"name\":\"token_network_address\",\"type\":\"address\"},{\"indexed\":false,\"name\":\"channel_identifier\",\"type\":\"uint256\"},{\"indexed\":false,\"name\":\"reward_amount\",\"type\":\"uint256\"},{\"indexed\":true,\"name\":\"nonce\",\"type\":\"uint256\"},{\"indexed\":true,\"name\":\"ms_address\",\"type\":\"address\"},{\"indexed\":true,\"name\":\"raiden_node_address\",\"type\":\"address\"}],\"name\":\"NewBalanceProofReceived\",\"type\":\"event\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":true,\"name\":\"ms_address\",\"type\":\"address\"},{\"indexed\":false,\"name\":\"amount\",\"type\":\"uint256\"},{\"indexed\":true,\"name\":\"reward_identifier\",\"type\":\"bytes32\"}],\"name\":\"RewardClaimed\",\"type\":\"event\"}],\"devdoc\":{\"methods\":{\"claimReward(uint256,address,address,address)\":{\"params\":{\"closing_participant\":\"Address of the participant of the channel that called close\",\"non_closing_participant\":\"The other participant of the channel\",\"token_network_address\":\"Address of the Token Network in which the channel exists\"}},\"contractExists(address)\":{\"params\":{\"contract_address\":\"The address to check whether a contract is deployed or not\"},\"return\":\"True if a contract exists, false otherwise\"},\"monitor(address,address,bytes32,uint256,bytes32,bytes,bytes,uint256,address,bytes)\":{\"params\":{\"nonce\":\"Strictly monotonic value used to order BPs omitting PB specific params, since these will not be provided in the future\",\"reward_amount\":\"Amount of tokens to be rewarded\",\"reward_proof_signature\":\"The signature of the signed reward proof\",\"token_network_address\":\"Address of the Token Network in which the channel being monitored exists.\"}}}},\"userdoc\":{\"methods\":{\"claimReward(uint256,address,address,address)\":{\"notice\":\"Called after a monitored channel is settled in order for MS to claim the reward Can be called once per settled channel by everyone on behalf of MS\"},\"contractExists(address)\":{\"notice\":\"Check if a contract exists\"},\"monitor(address,address,bytes32,uint256,bytes32,bytes,bytes,uint256,address,bytes)\":{\"notice\":\"Called by a registered MS, when providing a new balance proof to a monitored channel. Can be called multiple times by different registered MSs as long as the BP provided is newer than the current newest registered BP.\"}}}},\"settings\":{\"compilationTarget\":{\"data/source/test/MonitoringServiceInternalsTest.sol\":\"MonitoringServiceInternalsTest\"},\"evmVersion\":\"byzantium\",\"libraries\":{},\"optimizer\":{\"enabled\":false,\"runs\":200},\"remappings\":[\":.=.\",\":lib=data/source/lib\",\":raiden=data/source/raiden\",\":services=data/source/services\",\":test=data/source/test\"]},\"sources\":{\"data/source/lib/ECVerify.sol\":{\"keccak256\":\"0x8bb402baa478eb53252d77b63982e12685adda290cf4dfa1d8f510284f8df3e9\",\"urls\":[\"bzzr://474c3db1bb54bb831c32eb2ab67a0e870489994bd4d4b8a8fa24b54935211d43\"]},\"data/source/raiden/SecretRegistry.sol\":{\"keccak256\":\"0xb8078bc048ccdeb7c58026754f22fc378baf3b24090db0f17d10bda6cd4951b4\",\"urls\":[\"bzzr://f7a072330393a85a6a274ef526ac2ca0f8eb217bf5f48c18b3080be7ac3a7ede\"]},\"data/source/raiden/Token.sol\":{\"keccak256\":\"0x41b40819d7f6714550c742f48ce46daeb97255c08bc56e83bb9fde4fbe14c3b4\",\"urls\":[\"bzzr://a20e2bea336fb01584cf4dc80e77bb8db3c33666f77f840fd58559116849ae4b\"]},\"data/source/raiden/TokenNetwork.sol\":{\"keccak256\":\"0xe8abde4af3b77ab25167f3bd056ce1acd8d16fa2aec09861b41b118e038ce0f5\",\"urls\":[\"bzzr://1161945467e0f0c7cc39df9b33450d88f35fa1b4d76306030f49fbdd481c4326\"]},\"data/source/raiden/Utils.sol\":{\"keccak256\":\"0x602fd914e5644696d3c5d42e3a39fe6f16e7ddcc93f8864aa7e368a70cb56d0b\",\"urls\":[\"bzzr://b884810b9826074efb212a825d33409c35d9a159681690e821da3643052be3d1\"]},\"data/source/services/MonitoringService.sol\":{\"keccak256\":\"0x52f6eb0877d929cf69342fb3c0cd1e455d9804acf15bbc5be8ce1b6580b9a9a3\",\"urls\":[\"bzzr://e5aac1ffdf3ef3d3bf5d8c491312336b3eff7153d1cdb74eedf873d6cd88f204\"]},\"data/source/services/ServiceRegistry.sol\":{\"keccak256\":\"0x2566b42f123826aed4c039c50d6fbe3433e43461e0b7b8d8821c02bacfd34907\",\"urls\":[\"bzzr://16b6b8a940b5dedee7489f41faaad98ffafa76e738e828964d1d760fca7c355d\"]},\"data/source/services/UserDeposit.sol\":{\"keccak256\":\"0x23fae922fe184ab0e4a1a25349f7ade63103c298625bc29c4f1b285619d054f0\",\"urls\":[\"bzzr://42777a151afd25154d5adfc875921c00261cae360b676cad959e62829b2fe5b6\"]},\"data/source/test/MonitoringServiceInternalsTest.sol\":{\"keccak256\":\"0x76f01cee7a703d7d000d49699050a752243935308b6685856ab4a5c454119491\",\"urls\":[\"bzzr://4519ab40621884f999c122784b72e9e1082115331857a44393e1927301d67f09\"]}},\"version\":1}"
         },
         "OneToN": {
             "abi": [
@@ -1568,7 +1650,21 @@
                 {
                     "constant": true,
                     "inputs": [],
-                    "name": "serviceCount",
+                    "name": "set_price",
+                    "outputs": [
+                        {
+                            "name": "",
+                            "type": "uint256"
+                        }
+                    ],
+                    "payable": false,
+                    "stateMutability": "view",
+                    "type": "function"
+                },
+                {
+                    "constant": true,
+                    "inputs": [],
+                    "name": "set_price_at",
                     "outputs": [
                         {
                             "name": "",
@@ -1607,19 +1703,33 @@
                         }
                     ],
                     "name": "setURL",
-                    "outputs": [],
+                    "outputs": [
+                        {
+                            "name": "_success",
+                            "type": "bool"
+                        }
+                    ],
                     "payable": false,
                     "stateMutability": "nonpayable",
                     "type": "function"
                 },
                 {
                     "constant": true,
-                    "inputs": [],
-                    "name": "owner",
+                    "inputs": [
+                        {
+                            "name": "_set_price",
+                            "type": "uint256"
+                        },
+                        {
+                            "name": "_seconds_passed",
+                            "type": "uint256"
+                        }
+                    ],
+                    "name": "decayed_price",
                     "outputs": [
                         {
                             "name": "",
-                            "type": "address"
+                            "type": "uint256"
                         }
                     ],
                     "payable": false,
@@ -1627,36 +1737,55 @@
                     "type": "function"
                 },
                 {
-                    "constant": false,
+                    "constant": true,
                     "inputs": [
                         {
-                            "name": "amount",
+                            "name": "",
+                            "type": "address"
+                        }
+                    ],
+                    "name": "service_valid_till",
+                    "outputs": [
+                        {
+                            "name": "",
                             "type": "uint256"
                         }
                     ],
-                    "name": "deposit",
-                    "outputs": [],
                     "payable": false,
-                    "stateMutability": "nonpayable",
+                    "stateMutability": "view",
                     "type": "function"
                 },
                 {
                     "constant": true,
-                    "inputs": [
+                    "inputs": [],
+                    "name": "current_price",
+                    "outputs": [
                         {
                             "name": "",
-                            "type": "address"
+                            "type": "uint256"
                         }
                     ],
-                    "name": "urls",
+                    "payable": false,
+                    "stateMutability": "view",
+                    "type": "function"
+                },
+                {
+                    "constant": false,
+                    "inputs": [
+                        {
+                            "name": "_limit_amount",
+                            "type": "uint256"
+                        }
+                    ],
+                    "name": "deposit",
                     "outputs": [
                         {
-                            "name": "",
-                            "type": "string"
+                            "name": "_success",
+                            "type": "bool"
                         }
                     ],
                     "payable": false,
-                    "stateMutability": "view",
+                    "stateMutability": "nonpayable",
                     "type": "function"
                 },
                 {
@@ -1664,14 +1793,14 @@
                     "inputs": [
                         {
                             "name": "",
-                            "type": "uint256"
+                            "type": "address"
                         }
                     ],
-                    "name": "service_addresses",
+                    "name": "urls",
                     "outputs": [
                         {
                             "name": "",
-                            "type": "address"
+                            "type": "string"
                         }
                     ],
                     "payable": false,
@@ -1693,39 +1822,51 @@
                     "type": "function"
                 },
                 {
-                    "constant": true,
                     "inputs": [
                         {
-                            "name": "",
+                            "name": "_token_for_registration",
                             "type": "address"
-                        }
-                    ],
-                    "name": "deposits",
-                    "outputs": [
+                        },
                         {
-                            "name": "",
+                            "name": "_initial_price",
                             "type": "uint256"
                         }
                     ],
                     "payable": false,
-                    "stateMutability": "view",
-                    "type": "function"
+                    "stateMutability": "nonpayable",
+                    "type": "constructor"
                 },
                 {
+                    "anonymous": false,
                     "inputs": [
                         {
-                            "name": "_token_for_registration",
+                            "indexed": true,
+                            "name": "service",
+                            "type": "address"
+                        },
+                        {
+                            "indexed": false,
+                            "name": "valid_till",
+                            "type": "uint256"
+                        },
+                        {
+                            "indexed": false,
+                            "name": "deposit_amount",
+                            "type": "uint256"
+                        },
+                        {
+                            "indexed": false,
+                            "name": "deposit_contract",
                             "type": "address"
                         }
                     ],
-                    "payable": false,
-                    "stateMutability": "nonpayable",
-                    "type": "constructor"
+                    "name": "RegisteredService",
+                    "type": "event"
                 }
             ],
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+            "metadata": "{\"compiler\":{\"version\":\"0.5.4+commit.9549d8ff\"},\"language\":\"Solidity\",\"output\":{\"abi\":[{\"constant\":true,\"inputs\":[],\"name\":\"set_price\",\"outputs\":[{\"name\":\"\",\"type\":\"uint256\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"constant\":true,\"inputs\":[],\"name\":\"set_price_at\",\"outputs\":[{\"name\":\"\",\"type\":\"uint256\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"constant\":true,\"inputs\":[{\"name\":\"contract_address\",\"type\":\"address\"}],\"name\":\"contractExists\",\"outputs\":[{\"name\":\"\",\"type\":\"bool\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"constant\":false,\"inputs\":[{\"name\":\"new_url\",\"type\":\"string\"}],\"name\":\"setURL\",\"outputs\":[{\"name\":\"_success\",\"type\":\"bool\"}],\"payable\":false,\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"constant\":true,\"inputs\":[{\"name\":\"_set_price\",\"type\":\"uint256\"},{\"name\":\"_seconds_passed\",\"type\":\"uint256\"}],\"name\":\"decayed_price\",\"outputs\":[{\"name\":\"\",\"type\":\"uint256\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"constant\":true,\"inputs\":[{\"name\":\"\",\"type\":\"address\"}],\"name\":\"service_valid_till\",\"outputs\":[{\"name\":\"\",\"type\":\"uint256\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"constant\":true,\"inputs\":[],\"name\":\"current_price\",\"outputs\":[{\"name\":\"\",\"type\":\"uint256\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"constant\":false,\"inputs\":[{\"name\":\"_limit_amount\",\"type\":\"uint256\"}],\"name\":\"deposit\",\"outputs\":[{\"name\":\"_success\",\"type\":\"bool\"}],\"payable\":false,\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"constant\":true,\"inputs\":[{\"name\":\"\",\"type\":\"address\"}],\"name\":\"urls\",\"outputs\":[{\"name\":\"\",\"type\":\"string\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"constant\":true,\"inputs\":[],\"name\":\"token\",\"outputs\":[{\"name\":\"\",\"type\":\"address\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"name\":\"_token_for_registration\",\"type\":\"address\"},{\"name\":\"_initial_price\",\"type\":\"uint256\"}],\"payable\":false,\"stateMutability\":\"nonpayable\",\"type\":\"constructor\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":true,\"name\":\"service\",\"type\":\"address\"},{\"indexed\":false,\"name\":\"valid_till\",\"type\":\"uint256\"},{\"indexed\":false,\"name\":\"deposit_amount\",\"type\":\"uint256\"},{\"indexed\":false,\"name\":\"deposit_contract\",\"type\":\"address\"}],\"name\":\"RegisteredService\",\"type\":\"event\"}],\"devdoc\":{\"methods\":{\"contractExists(address)\":{\"params\":{\"contract_address\":\"The address to check whether a contract is deployed or not\"},\"return\":\"True if a contract exists, false otherwise\"},\"decayed_price(uint256,uint256)\":{\"params\":{\"_seconds_passed\":\"The number of seconds passed since the initial price was set.\",\"_set_price\":\"The initial price.\"}},\"setURL(string)\":{\"params\":{\"new_url\":\"The new URL string to be stored.\"}}}},\"userdoc\":{\"methods\":{\"contractExists(address)\":{\"notice\":\"Check if a contract exists\"},\"current_price()\":{\"notice\":\"The amount of deposits for registration or extension. Note: the price moves quickly depending on what other addresses do. The current price might change after you send a `deposit()` transaction before the transaction is executed.\"},\"decayed_price(uint256,uint256)\":{\"notice\":\"Calculates the decreased price after a number of seconds.\"},\"setURL(string)\":{\"notice\":\"Sets the URL used to access a service via HTTP. Only a currently registered service can call this successfully.\"}}}},\"settings\":{\"compilationTarget\":{\"data/source/services/ServiceRegistry.sol\":\"ServiceRegistry\"},\"evmVersion\":\"byzantium\",\"libraries\":{},\"optimizer\":{\"enabled\":false,\"runs\":200},\"remappings\":[\":.=.\",\":lib=data/source/lib\",\":raiden=data/source/raiden\",\":services=data/source/services\",\":test=data/source/test\"]},\"sources\":{\"data/source/raiden/Token.sol\":{\"keccak256\":\"0x41b40819d7f6714550c742f48ce46daeb97255c08bc56e83bb9fde4fbe14c3b4\",\"urls\":[\"bzzr://a20e2bea336fb01584cf4dc80e77bb8db3c33666f77f840fd58559116849ae4b\"]},\"data/source/raiden/Utils.sol\":{\"keccak256\":\"0x602fd914e5644696d3c5d42e3a39fe6f16e7ddcc93f8864aa7e368a70cb56d0b\",\"urls\":[\"bzzr://b884810b9826074efb212a825d33409c35d9a159681690e821da3643052be3d1\"]},\"data/source/services/ServiceRegistry.sol\":{\"keccak256\":\"0x2566b42f123826aed4c039c50d6fbe3433e43461e0b7b8d8821c02bacfd34907\",\"urls\":[\"bzzr://16b6b8a940b5dedee7489f41faaad98ffafa76e738e828964d1d760fca7c355d\"]}},\"version\":1}"
         },
         "SignatureVerifyTest": {
             "abi": [
@@ -6713,7 +6854,7 @@
         "MonitoringServiceInternalsTest.sol": "422a316bc07f38b1754bee07ecf10053fb0a9a36d2c0f6512f1c08a459ef74f2",
         "OneToN.sol": "b6ac1a94a6c9d7b968c776ba5bddc6820815d942e6493505a318024d9cfc405e",
         "SecretRegistry.sol": "c44e068b6e612c1a66267da30f88f203d2d700552fe36bcae48d669d9322d8b7",
-        "ServiceRegistry.sol": "f59fdea299b8917732de8fcb2bc4d697b46faff8c9c3edaf4fa4d8bdfbcc017d",
+        "ServiceRegistry.sol": "55232fccbc03d71d545c94d6c9d125319c152a39a77491624d9b2f038c887fe3",
         "SignatureVerifyTest.sol": "505b5b380b36f5aff4b7cb6316a5985b31f7f78c61b23ca56c545473085d6f3b",
         "StandardToken.sol": "3dcb1cc738bd525c27a00afdcec0b177e47be2e622906d210001995ab99141ab",
         "Token.sol": "1a73cc2b96ad17dca1b5ba83d943e4576764862c56037905daea0544277d4cd4",
@@ -6725,5 +6866,5 @@
         "Utils.sol": "c37282ebe7cae3a26a8bdb34c25f779202e99d95e09a68cae6b9e92199f10f32"
     },
     "contracts_version": null,
-    "overall_checksum": "594b0ffd0abef99bc416599a3ca038bc38c44131ec0104daa3785e1e66587b81"
+    "overall_checksum": "7f9aa47def7f05a6dea8bd0314755c059f367cc87acb8141798735cc1dd0a57e"
 }
\ No newline at end of file
diff --git a/raiden_contracts/data/gas.json b/raiden_contracts/data/gas.json
index 89ec16345..35c897d06 100644
--- a/raiden_contracts/data/gas.json
+++ b/raiden_contracts/data/gas.json
@@ -4,20 +4,22 @@
     "CustomToken.transfer": 36123,
     "CustomToken.transferFrom": 29557,
     "MonitoringService.claimReward": 41931,
-    "MonitoringService.monitor": 207422,
-    "OneToN.claim": 92705,
+    "MonitoringService.monitor": 207736,
+    "OneToN.claim": 92786,
     "SecretRegistry.registerSecret": 46892,
-    "TokenNetwork DEPLOYMENT": 4277369,
-    "TokenNetwork.closeChannel": 111155,
+    "ServiceRegistry.deposit": 433192,
+    "ServiceRegistry.setURL": 44555,
+    "TokenNetwork DEPLOYMENT": 4283201,
+    "TokenNetwork.closeChannel": 111439,
     "TokenNetwork.openChannel": 97745,
-    "TokenNetwork.setTotalDeposit": 44909,
-    "TokenNetwork.setTotalWithdraw": 103306,
-    "TokenNetwork.settleChannel": 108229,
-    "TokenNetwork.unlock 1 locks": 31549,
-    "TokenNetwork.unlock 6 locks": 58649,
-    "TokenNetwork.updateNonClosingBalanceProof": 93786,
-    "TokenNetworkRegistry DEPLOYMENT": 4947971,
-    "TokenNetworkRegistry createERC20TokenNetwork": 3300096,
+    "TokenNetwork.setTotalDeposit": 44845,
+    "TokenNetwork.setTotalWithdraw": 103178,
+    "TokenNetwork.settleChannel": 108197,
+    "TokenNetwork.unlock 1 locks": 31485,
+    "TokenNetwork.unlock 6 locks": 58457,
+    "TokenNetwork.updateNonClosingBalanceProof": 93972,
+    "TokenNetworkRegistry DEPLOYMENT": 4953811,
+    "TokenNetworkRegistry createERC20TokenNetwork": 3304504,
     "UserDeposit.deposit": 92392,
     "UserDeposit.deposit (increase balance)": 32392,
     "UserDeposit.planWithdraw": 64021,
diff --git a/raiden_contracts/data/source/services/ServiceRegistry.sol b/raiden_contracts/data/source/services/ServiceRegistry.sol
index d2b8c4980..0fe760b70 100644
--- a/raiden_contracts/data/source/services/ServiceRegistry.sol
+++ b/raiden_contracts/data/source/services/ServiceRegistry.sol
@@ -3,49 +3,173 @@ pragma solidity 0.5.4;
 import "raiden/Token.sol";
 import "raiden/Utils.sol";
 
+contract Deposit {
+    // This contract holds ERC20 tokens as deposit until a predetemined point of time.
+
+    // The ERC20 token contract that the deposit is about.
+    Token public token;
+
+    // The address that can withdraw the deposit after the release time.
+    address public withdrawer;
+
+    // The timestamp after which the withdrawer can withdraw the deposit.
+    uint256 public release_at;
+
+    /// @param _token The address of the ERC20 token contract where the deposit is accounted.
+    /// @param _release_at The timestap after which the withdrawer can withdraw the deposit.
+    /// @param _withdrawer The address that can withdraw the deposit after the release time.
+    constructor(address _token, uint256 _release_at, address _withdrawer) public {
+        token = Token(_token);
+        // Don't care even if it's in the past.
+        release_at = _release_at;
+        withdrawer = _withdrawer;
+    }
+
+    // In order to make a deposit, transfer the ERC20 token into this contract.
+    // If you transfer a wrong kind of ERC20 token or ETH into this contract,
+    // these tokens will be lost forever.
+
+    /// @notice Withdraws the tokens that have been deposited.
+    /// Only `withdrawer` can call this.
+    /// @param _to The address where the withdrawn tokens should go.
+    function withdraw(address payable _to) external {
+        uint256 balance = token.balanceOf(address(this));
+        require(msg.sender == withdrawer, "the caller is not the withdrawer");
+        require(now >= release_at, "deposit not released yet");
+        require(balance > 0, "nothing to withdraw");
+        require(token.transfer(_to, balance), "token didn't transfer");
+        selfdestruct(_to); // The contract can disappear.
+    }
+}
+
+
 contract ServiceRegistry is Utils {
     Token public token;
-    address public owner;
 
-    mapping(address => uint256) public deposits;  // token amount staked by the service provider
+    // After a price is set to set_price at timestamp set_price_at,
+    // the price decays according to decayed_price().
+    uint256 public set_price;
+    uint256 public set_price_at;
+
+    // Once the price is at min_price, it can't decay further.
+    uint256 constant min_price = 1000;
+
+    mapping(address => uint256) public service_valid_till;
     mapping(address => string) public urls;  // URLs of services for HTTP access
-    address[] public service_addresses;  // list of available services (ethereum addresses)
+
+    // @param service The address of the registered service provider
+    // @param valid_till The timestamp of the moment when the registration expires
+    // @param deposit_amount The amount of deposit transferred
+    // @param deposit The address of Deposit instance where the deposit is stored.
+    event RegisteredService(address indexed service, uint256 valid_till, uint256 deposit_amount, Deposit deposit_contract);
 
     // @param _token_for_registration The address of the ERC20 token contract that services use for registration fees
-    constructor(address _token_for_registration) public {
+    constructor(address _token_for_registration, uint256 _initial_price) public {
         require(_token_for_registration != address(0x0), "token at address zero");
         require(contractExists(_token_for_registration), "token has no code");
+        require(_initial_price >= min_price, "initial price too low");
 
         token = Token(_token_for_registration);
         // Check if the contract is indeed a token contract
         require(token.totalSupply() > 0, "total supply zero");
-        owner = msg.sender;
+
+        // Set up the price and the set price timestamp
+        set_price = _initial_price;
+        set_price_at = now;
     }
 
-    function deposit(uint amount) public {
-        require(amount > 0);
+    // @notice Locks tokens and registers a service or extends the registration.
+    // @param _limit_amount The biggest amount of tokens that the caller is willing to deposit.
+    // The call fails if the current price is higher (this is always possible
+    // when other parties have just called `deposit()`).
+    function deposit(uint _limit_amount) public returns (bool _success) {
+        uint256 amount = current_price();
+        require(_limit_amount >= amount, "not enough limit");
+
+        // Extend the service position.
+        uint256 valid_till = service_valid_till[msg.sender];
+        if (valid_till < now) { // a first time joiner or an expired service.
+            valid_till = now;
+        }
+        // Check against overflow.
+        require(valid_till < valid_till + 180 days, "overflow during extending the registration");
+        valid_till = valid_till + 180 days;
+        assert(valid_till > service_valid_till[msg.sender]);
+        service_valid_till[msg.sender] = valid_till;
+
+        // Record the price
+        set_price = amount * 6 / 5;
+        set_price_at = now;
+
+        // Move the deposit in a new Deposit contract.
+        Deposit depo = new Deposit(address(token), valid_till, msg.sender);
+        require(token.transferFrom(msg.sender, address(depo), amount), "Token transfer for deposit failed");
 
-        // This also allows for MSs to deposit and use other MSs
-        deposits[msg.sender] += amount;
+        // Fire event
+        emit RegisteredService(msg.sender, valid_till, amount, depo);
 
-        // Transfer the deposit to the smart contract
-        require(token.transferFrom(msg.sender, address(this), amount), "tokens did not transfer");
+        return true;
     }
 
-    /// Set the URL used to access a service via HTTP.
-    /// When this is called for the first time, the service's ethereum address
-    /// is also added to `service_addresses`.
-    function setURL(string memory new_url) public {
+    /// @notice Sets the URL used to access a service via HTTP.
+    /// Only a currently registered service can call this successfully.
+    /// @param new_url The new URL string to be stored.
+    function setURL(string memory new_url) public returns (bool _success)  {
+        require(now < service_valid_till[msg.sender], "registration expired");
         require(bytes(new_url).length != 0, "new url is empty string");
-        if (bytes(urls[msg.sender]).length == 0) {
-            service_addresses.push(msg.sender);
-        }
         urls[msg.sender] = new_url;
+        return true;
+    }
+
+    /// The amount of time till the price decreases to roughly 1/e.
+    uint constant decay_constant = 200 days; // Maybe make this configurable?
+
+    /// @notice Calculates the decreased price after a number of seconds.
+    /// @param _set_price The initial price.
+    /// @param _seconds_passed The number of seconds passed since the initial
+    /// price was set.
+    function decayed_price(uint256 _set_price, uint256 _seconds_passed) public
+        view returns (uint256) {
+        // We are here trying to approximate some exponential decay.
+        // exp(- X / A) where
+        //   X is the number of seconds since the last price change
+        //   A is the decay constant (A = 200 days corresponds to 0.5% decrease per day)
+
+        // exp(- X / A) ~~ P / Q where
+        //   P = 24 A^4
+        //   Q = 24 A^4 + 24 A^3X + 12 A^2X^2 + 4 AX^3 + X^4
+        // Note: swap P and Q, and then think about the Taylor expansion.
+
+        uint256 X = _seconds_passed;
+
+        if (X >= 2 ** 60) { // The computation below overflows.
+            return min_price;
+        }
+
+        uint256 A = decay_constant;
+
+        uint256 P = 24 * (A ** 4);
+        uint256 Q = P + 24*(A**3)*X + 12*(A**2)*(X**2) + 4*A*(X**3) + X**4;
+
+        uint256 price = _set_price * P / Q;
+
+        // Not allowing a price smaller than 1000.
+        // Once it's too low it's too low forever.
+        if (price < min_price) {  // Maybe make this configurable too?
+            price = min_price;
+        }
+        return price;
     }
 
-    /// Returns number of registered services. Useful for accessing service_addresses.
-    function serviceCount() public view returns(uint) {
-        return service_addresses.length;
+    /// @notice The amount of deposits for registration or extension.
+    /// Note: the price moves quickly depending on what other addresses do.
+    /// The current price might change after you send a `deposit()` transaction
+    /// before the transaction is executed.
+    function current_price() public view returns (uint256) {
+        require(now >= set_price_at, "An underflow in price computation");
+        uint256 seconds_passed = now - set_price_at;
+
+        return decayed_price(set_price, seconds_passed);
     }
 }
 
diff --git a/raiden_contracts/deploy/__main__.py b/raiden_contracts/deploy/__main__.py
index d9ff9699a..8bd5b84dd 100644
--- a/raiden_contracts/deploy/__main__.py
+++ b/raiden_contracts/deploy/__main__.py
@@ -208,6 +208,12 @@ def raiden(
     type=int,
     help="Maximum amount of tokens deposited in UserDeposit",
 )
+@click.option(
+    "--initial-service-registration-price",
+    required=True,
+    type=int,
+    help="Initial amount of deposit for a registration in ServiceRegistry",
+)
 @click.option("--save-info/--no-save-info", default=True, help="Save deployment info to a file.")
 @click.pass_context
 def services(
@@ -221,12 +227,15 @@ def services(
     save_info: bool,
     contracts_version: Optional[str],
     user_deposit_whole_limit: int,
+    initial_service_registration_price: int,
 ) -> None:
     setup_ctx(ctx, private_key, rpc_provider, wait, gas_price, gas_limit, contracts_version)
     deployer: ContractDeployer = ctx.obj["deployer"]
 
     deployed_contracts_info = deployer.deploy_service_contracts(
-        token_address=token_address, user_deposit_whole_balance_limit=user_deposit_whole_limit
+        token_address=token_address,
+        user_deposit_whole_balance_limit=user_deposit_whole_limit,
+        initial_service_registration_price=initial_service_registration_price,
     )
     deployed_contracts = {
         contract_name: info["address"]
diff --git a/raiden_contracts/deploy/contract_deployer.py b/raiden_contracts/deploy/contract_deployer.py
index 4f3f848fe..1b2ed904b 100644
--- a/raiden_contracts/deploy/contract_deployer.py
+++ b/raiden_contracts/deploy/contract_deployer.py
@@ -27,7 +27,10 @@
 from raiden_contracts.utils.file_ops import load_json_from_path
 from raiden_contracts.utils.signature import private_key_to_address
 from raiden_contracts.utils.transaction import check_successful_tx
-from raiden_contracts.utils.versions import contracts_version_expects_deposit_limits
+from raiden_contracts.utils.versions import (
+    contracts_version_expects_deposit_limits,
+    contracts_version_has_initial_service_deposit,
+)
 
 LOG = getLogger(__name__)
 
@@ -303,9 +306,17 @@ def _register_token_network_with_limits(
         return token_network_address
 
     def deploy_service_contracts(
-        self, token_address: HexAddress, user_deposit_whole_balance_limit: int
+        self,
+        token_address: HexAddress,
+        user_deposit_whole_balance_limit: int,
+        initial_service_registration_price: int,
     ) -> DeployedContracts:
         """Deploy 3rd party service contracts"""
+        if not contracts_version_has_initial_service_deposit(
+            self.contract_manager.contracts_version
+        ):
+            raise RuntimeError("Deployment of older service contracts is not suppported.")
+
         chain_id = int(self.web3.version.network)
         deployed_contracts: DeployedContracts = {
             "contracts_version": self.contract_manager.contracts_version,
@@ -313,7 +324,11 @@ def deploy_service_contracts(
             "contracts": {},
         }
 
-        self._deploy_and_remember(CONTRACT_SERVICE_REGISTRY, [token_address], deployed_contracts)
+        self._deploy_and_remember(
+            CONTRACT_SERVICE_REGISTRY,
+            [token_address, initial_service_registration_price],
+            deployed_contracts,
+        )
         user_deposit = self._deploy_and_remember(
             contract_name=CONTRACT_USER_DEPOSIT,
             arguments=[token_address, user_deposit_whole_balance_limit],
diff --git a/raiden_contracts/deploy/contract_verifier.py b/raiden_contracts/deploy/contract_verifier.py
index de14bf6a5..4b681a487 100644
--- a/raiden_contracts/deploy/contract_verifier.py
+++ b/raiden_contracts/deploy/contract_verifier.py
@@ -132,9 +132,13 @@ def verify_deployment_data(self, deployment_data: DeployedContracts) -> bool:
             != secret_registry.address
         ):
             raise RuntimeError("secret_registry_address onchain has an unexpected value.")
+        if len(constructor_arguments) != 5:
+            raise RuntimeError(
+                "TokenNetworkRegistry received a wrong number of constructor arguments."
+            )
         if secret_registry.address != constructor_arguments[0]:
             raise RuntimeError(
-                "TokenNetwork's constructor received a different SecretRegistry address."
+                "TokenNetworkRegistry's constructor received a different SecretRegistry address."
             )
         if token_network_registry.functions.chain_id().call() != constructor_arguments[1]:
             raise RuntimeError("TokenNetwork remembers a wrong chain_id.")
@@ -348,14 +352,14 @@ def _verify_service_registry_deployment(
 ) -> None:
     """ Check an onchain deployment of ServiceRegistry and constructor arguments """
     if to_checksum_address(service_registry.functions.token().call()) != token_address:
-        raise RuntimeError("service_registry has a wrong token address")
+        raise RuntimeError("ServiceRegistry has a wrong token address")
+    if len(constructor_arguments) != 2:
+        raise RuntimeError(
+            "ServiceRegistry was deployed with a wrong number of constructor arguments"
+        )
     if token_address != constructor_arguments[0]:
         raise RuntimeError(
             f"expected token addredd {token_address} "
             f"but the constructor argument for {CONTRACT_SERVICE_REGISTRY} is "
             f"{constructor_arguments[0]}"
         )
-    if len(constructor_arguments) != 1:
-        raise RuntimeError(
-            "service_registry was deployed with a wrong number of constructor arguments"
-        )
diff --git a/raiden_contracts/tests/fixtures/__init__.py b/raiden_contracts/tests/fixtures/__init__.py
index 3e8c76721..68ed58b4c 100644
--- a/raiden_contracts/tests/fixtures/__init__.py
+++ b/raiden_contracts/tests/fixtures/__init__.py
@@ -3,6 +3,7 @@
 from .base import *
 from .channel import *
 from .contracts import *
+from .deposit_fixtures import *
 from .monitoring_service import *
 from .one_to_n import *
 from .secret_registry import *
diff --git a/raiden_contracts/tests/fixtures/deposit_fixtures.py b/raiden_contracts/tests/fixtures/deposit_fixtures.py
new file mode 100644
index 000000000..3e9361897
--- /dev/null
+++ b/raiden_contracts/tests/fixtures/deposit_fixtures.py
@@ -0,0 +1,16 @@
+from typing import Callable, List
+
+import pytest
+from web3.contract import Contract
+
+from raiden_contracts.constants import CONTRACT_DEPOSIT
+
+
+@pytest.fixture
+def get_deposit_contract(deploy_tester_contract: Callable) -> Callable:
+    """Deploy a Deposit contract with the given arguments"""
+
+    def get(arguments: List) -> Contract:
+        return deploy_tester_contract(CONTRACT_DEPOSIT, arguments)
+
+    return get
diff --git a/raiden_contracts/tests/fixtures/service_registry_fixtures.py b/raiden_contracts/tests/fixtures/service_registry_fixtures.py
index f9d72b8b8..ea990a9fb 100644
--- a/raiden_contracts/tests/fixtures/service_registry_fixtures.py
+++ b/raiden_contracts/tests/fixtures/service_registry_fixtures.py
@@ -8,4 +8,6 @@
 
 @pytest.fixture(scope="session")
 def service_registry(deploy_tester_contract: Callable, custom_token: Contract) -> Contract:
-    return deploy_tester_contract(CONTRACT_SERVICE_REGISTRY, [custom_token.address])
+    return deploy_tester_contract(
+        CONTRACT_SERVICE_REGISTRY, [custom_token.address, 3000 * (10 ** 18)]
+    )
diff --git a/raiden_contracts/tests/fixtures/token_network_fixtures.py b/raiden_contracts/tests/fixtures/token_network_fixtures.py
index 9eea0122e..dadb6ad30 100644
--- a/raiden_contracts/tests/fixtures/token_network_fixtures.py
+++ b/raiden_contracts/tests/fixtures/token_network_fixtures.py
@@ -21,7 +21,7 @@
 
 
 @pytest.fixture
-def get_token_network(deploy_tester_contract: Contract) -> Callable:
+def get_token_network(deploy_tester_contract: Callable) -> Callable:
     """Deploy a token network as a separate contract (registry is not used)"""
 
     def get(arguments: List) -> Contract:
diff --git a/raiden_contracts/tests/test_deploy_script.py b/raiden_contracts/tests/test_deploy_script.py
index 99793b3e0..a7afba358 100644
--- a/raiden_contracts/tests/test_deploy_script.py
+++ b/raiden_contracts/tests/test_deploy_script.py
@@ -41,7 +41,10 @@
     validate_address,
     verify,
 )
-from raiden_contracts.deploy.contract_deployer import contracts_version_expects_deposit_limits
+from raiden_contracts.deploy.contract_deployer import (
+    contracts_version_expects_deposit_limits,
+    contracts_version_has_initial_service_deposit,
+)
 from raiden_contracts.deploy.contract_verifier import (
     _verify_monitoring_service_deployment,
     _verify_user_deposit_deployment,
@@ -51,6 +54,7 @@
     CONTRACT_DEPLOYER_ADDRESS,
     EMPTY_ADDRESS,
     FAUCET_PRIVATE_KEY,
+    SERVICE_DEPOSIT,
     UINT256_MAX,
 )
 
@@ -130,7 +134,9 @@ def deployed_service_info(
     deployer: ContractDeployer, token_address: HexAddress
 ) -> DeployedContracts:
     return deployer.deploy_service_contracts(
-        token_address=token_address, user_deposit_whole_balance_limit=DEPOSIT_LIMIT
+        token_address=token_address,
+        user_deposit_whole_balance_limit=DEPOSIT_LIMIT,
+        initial_service_registration_price=SERVICE_DEPOSIT // 2,
     )
 
 
@@ -250,6 +256,13 @@ def test_deploy_script_raiden(
     with pytest.raises(RuntimeError):
         deployer.verify_deployment_data(deployed_contracts_info_fail)
 
+    deployed_contracts_info_fail = deepcopy(deployed_contracts_info)
+    deployed_contracts_info_fail["contracts"][CONTRACT_TOKEN_NETWORK_REGISTRY][
+        "constructor_arguments"
+    ] = []
+    with pytest.raises(RuntimeError):
+        deployer.verify_deployment_data(deployed_contracts_info_fail)
+
     # check that it fails if sender has no eth
     deployer = ContractDeployer(
         web3=web3, private_key=get_random_privkey(), gas_limit=GAS_LIMIT, gas_price=1, wait=10
@@ -761,6 +774,18 @@ def test_contracts_version_expects_deposit_limits() -> None:
         contracts_version_expects_deposit_limits("not a semver string")
 
 
+def test_contracts_version_has_initial_service_deposit() -> None:
+    assert not contracts_version_has_initial_service_deposit("0.3._")
+    assert not contracts_version_has_initial_service_deposit("0.4.0")
+    assert not contracts_version_has_initial_service_deposit("0.8.0_unlimited")
+    assert not contracts_version_has_initial_service_deposit("0.9.0")
+    assert not contracts_version_has_initial_service_deposit("0.10.0")
+    assert not contracts_version_has_initial_service_deposit("0.10.1")
+    assert contracts_version_has_initial_service_deposit(None)
+    with pytest.raises(ValueError):
+        contracts_version_has_initial_service_deposit("not a semver string")
+
+
 def deploy_token_arguments(privkey: str) -> List[str]:
     return [
         "--rpc-provider",
@@ -1008,6 +1033,8 @@ def deploy_services_arguments(privkey: str, save_info: Optional[bool]) -> List:
         "rpc_provider",
         "--user-deposit-whole-limit",
         100,
+        "--initial-service-registration-price",
+        SERVICE_DEPOSIT // 2,
     ]
     return common_arguments + save_info_arguments
 
diff --git a/raiden_contracts/tests/test_monitoring_service.py b/raiden_contracts/tests/test_monitoring_service.py
index 1daf9441e..313cdcd7f 100644
--- a/raiden_contracts/tests/test_monitoring_service.py
+++ b/raiden_contracts/tests/test_monitoring_service.py
@@ -13,6 +13,7 @@
     TEST_SETTLE_TIMEOUT_MIN,
     MonitoringServiceEvent,
 )
+from raiden_contracts.tests.utils import SERVICE_DEPOSIT
 from raiden_contracts.utils.proofs import sign_reward_proof
 
 REWARD_AMOUNT = 10
@@ -25,9 +26,11 @@ def ms_address(
     (ms,) = get_accounts(1)
 
     # register MS in the ServiceRegistry contract
-    custom_token.functions.mint(50).call_and_transact({"from": ms})
-    custom_token.functions.approve(service_registry.address, 20).call_and_transact({"from": ms})
-    service_registry.functions.deposit(20).call_and_transact({"from": ms})
+    custom_token.functions.mint(2 * SERVICE_DEPOSIT).call_and_transact({"from": ms})
+    custom_token.functions.approve(service_registry.address, SERVICE_DEPOSIT).call_and_transact(
+        {"from": ms}
+    )
+    service_registry.functions.deposit(SERVICE_DEPOSIT).call_and_transact({"from": ms})
 
     return ms
 
diff --git a/raiden_contracts/tests/test_print_gas.py b/raiden_contracts/tests/test_print_gas.py
index 5b839e983..6bd774f54 100644
--- a/raiden_contracts/tests/test_print_gas.py
+++ b/raiden_contracts/tests/test_print_gas.py
@@ -8,6 +8,7 @@
     CONTRACT_MONITORING_SERVICE,
     CONTRACT_ONE_TO_N,
     CONTRACT_SECRET_REGISTRY,
+    CONTRACT_SERVICE_REGISTRY,
     CONTRACT_TOKEN_NETWORK,
     CONTRACT_TOKEN_NETWORK_REGISTRY,
     CONTRACT_USER_DEPOSIT,
@@ -15,7 +16,11 @@
     TEST_SETTLE_TIMEOUT_MIN,
 )
 from raiden_contracts.contract_manager import gas_measurements
-from raiden_contracts.tests.utils.constants import CONTRACT_DEPLOYER_ADDRESS, UINT256_MAX
+from raiden_contracts.tests.utils.constants import (
+    CONTRACT_DEPLOYER_ADDRESS,
+    SERVICE_DEPOSIT,
+    UINT256_MAX,
+)
 from raiden_contracts.utils.pending_transfers import get_locked_amount, get_pending_transfers_tree
 from raiden_contracts.utils.proofs import sign_one_to_n_iou, sign_reward_proof
 
@@ -33,6 +38,8 @@ def test_gas_json_has_enough_fields(version: Optional[str]) -> None:
         "MonitoringService.monitor",
         "OneToN.claim",
         "SecretRegistry.registerSecret",
+        "ServiceRegistry.deposit",
+        "ServiceRegistry.setURL",
         "TokenNetwork DEPLOYMENT",
         "TokenNetwork.closeChannel",
         "TokenNetwork.openChannel",
@@ -247,9 +254,11 @@ def print_gas_monitoring_service(
     deposit_to_udc(B, reward_amount)
 
     # register MS in the ServiceRegistry contract
-    custom_token.functions.mint(50).call_and_transact({"from": MS})
-    custom_token.functions.approve(service_registry.address, 20).call_and_transact({"from": MS})
-    service_registry.functions.deposit(20).call_and_transact({"from": MS})
+    custom_token.functions.mint(SERVICE_DEPOSIT * 2).call_and_transact({"from": MS})
+    custom_token.functions.approve(service_registry.address, SERVICE_DEPOSIT).call_and_transact(
+        {"from": MS}
+    )
+    service_registry.functions.deposit(SERVICE_DEPOSIT).call_and_transact({"from": MS})
 
     # open a channel (c1, c2)
     channel_identifier = create_channel(A, B)[0]
@@ -367,6 +376,24 @@ def print_gas_user_deposit(
     print_gas(txn_hash, CONTRACT_USER_DEPOSIT + ".withdraw")
 
 
+@pytest.fixture
+def print_gas_service_registry(
+    get_accounts: Callable, custom_token: Contract, service_registry: Contract, print_gas: Callable
+) -> None:
+    (A,) = get_accounts(1)
+    custom_token.functions.mint(SERVICE_DEPOSIT).call_and_transact({"from": A})
+    custom_token.functions.approve(service_registry.address, SERVICE_DEPOSIT).call_and_transact(
+        {"from": A}
+    )
+
+    # happy path
+    deposit_tx = service_registry.functions.deposit(SERVICE_DEPOSIT).call_and_transact({"from": A})
+    print_gas(deposit_tx, CONTRACT_SERVICE_REGISTRY + ".deposit")
+    url = "http://example.com"
+    set_url_tx = service_registry.functions.setURL(url).call_and_transact({"from": A})
+    print_gas(set_url_tx, CONTRACT_SERVICE_REGISTRY + ".setURL")
+
+
 @pytest.fixture
 def print_gas_token(get_accounts: Callable, custom_token: Contract, print_gas: Callable) -> None:
     (A, B) = get_accounts(2)
@@ -391,6 +418,7 @@ def print_gas_token(get_accounts: Callable, custom_token: Contract, print_gas: C
     "print_gas_channel_cycle",
     "print_gas_monitoring_service",
     "print_gas_one_to_n",
+    "print_gas_service_registry",
     "print_gas_user_deposit",
     "print_gas_token",
 )
diff --git a/raiden_contracts/tests/test_service_registry.py b/raiden_contracts/tests/test_service_registry.py
index 6a9321533..9a7d1dcf0 100644
--- a/raiden_contracts/tests/test_service_registry.py
+++ b/raiden_contracts/tests/test_service_registry.py
@@ -2,49 +2,112 @@
 
 import pytest
 from eth_tester.exceptions import TransactionFailed
-from web3.contract import Contract
+from web3 import Web3
+from web3.contract import Contract, get_event_data
 
-from raiden_contracts.tests.utils.constants import CONTRACT_DEPLOYER_ADDRESS
+from raiden_contracts.constants import CONTRACT_SERVICE_REGISTRY, EVENT_REGISTERED_SERVICE
+from raiden_contracts.contract_manager import ContractManager, contracts_precompiled_path
+from raiden_contracts.tests.utils.constants import (
+    EMPTY_ADDRESS,
+    SECONDS_PER_DAY,
+    SERVICE_DEPOSIT,
+    UINT256_MAX,
+)
 
 
-def test_owner_of_service_registry(service_registry: Contract) -> None:
-    """ The owner of ServiceRegistry should be the deployer """
-    assert service_registry.functions.owner().call() == CONTRACT_DEPLOYER_ADDRESS
+def test_deposit_contract(
+    get_deposit_contract: Callable, custom_token: Contract, get_accounts: Callable
+) -> None:
+    (A,) = get_accounts(1)
+    custom_token.functions.mint(100).call_and_transact({"from": A})
+    depo = get_deposit_contract([custom_token.address, 0, A])
+    custom_token.functions.transfer(depo.address, 100).call_and_transact({"from": A})
+    assert custom_token.functions.balanceOf(A).call() == 0
+    assert custom_token.functions.balanceOf(depo.address).call() == 100
+    depo.functions.withdraw(A).call_and_transact({"from": A})
+    assert custom_token.functions.balanceOf(A).call() == 100
+    assert custom_token.functions.balanceOf(depo.address).call() == 0
+
+
+def test_deposit_contract_too_early_withdraw(
+    get_deposit_contract: Callable, custom_token: Contract, get_accounts: Callable
+) -> None:
+    (A,) = get_accounts(1)
+    custom_token.functions.mint(100).call_and_transact({"from": A})
+    depo = get_deposit_contract([custom_token.address, UINT256_MAX, A])
+    custom_token.functions.transfer(depo.address, 100).call_and_transact({"from": A})
+    assert custom_token.functions.balanceOf(A).call() == 0
+    assert custom_token.functions.balanceOf(depo.address).call() == 100
+    with pytest.raises(TransactionFailed):
+        depo.functions.withdraw(A).call_and_transact({"from": A})
+    assert custom_token.functions.balanceOf(A).call() == 0
+    assert custom_token.functions.balanceOf(depo.address).call() == 100
 
 
 def test_deposit(
     service_registry: Contract, custom_token: Contract, get_accounts: Callable
 ) -> None:
     (A,) = get_accounts(1)
-    custom_token.functions.mint(10).call_and_transact({"from": A})
-    custom_token.functions.approve(service_registry.address, 10).call_and_transact({"from": A})
+    custom_token.functions.mint(SERVICE_DEPOSIT).call_and_transact({"from": A})
+    custom_token.functions.approve(service_registry.address, SERVICE_DEPOSIT).call_and_transact(
+        {"from": A}
+    )
 
     # happy path
-    service_registry.functions.deposit(10).call_and_transact({"from": A})
-    assert service_registry.functions.deposits(A).call() == 10
-    assert custom_token.functions.balanceOf(A).call() == 0
+    old_balance = custom_token.functions.balanceOf(A).call()
+    old_price = service_registry.functions.current_price().call()
+    service_registry.functions.deposit(SERVICE_DEPOSIT).call_and_transact({"from": A})
+    assert old_balance > custom_token.functions.balanceOf(A).call() > old_balance - old_price
+    assert service_registry.functions.current_price().call() > old_price
+    first_expiration = service_registry.functions.service_valid_till(A).call()
 
     # custom_token does not allow transfer of more tokens
     with pytest.raises(TransactionFailed):
         service_registry.functions.deposit(1).call({"from": A})
 
+    # More minting and approving before extending the registration
+    custom_token.functions.mint(SERVICE_DEPOSIT).call_and_transact({"from": A})
+    custom_token.functions.approve(service_registry.address, SERVICE_DEPOSIT).call_and_transact(
+        {"from": A}
+    )
+
+    # Extending the registration
+    service_registry.functions.deposit(SERVICE_DEPOSIT).call_and_transact({"from": A})
+    second_expiration = service_registry.functions.service_valid_till(A).call()
+    assert second_expiration == first_expiration + 180 * SECONDS_PER_DAY
+
 
-def test_setURL(service_registry: Contract, get_accounts: Callable) -> None:
+def test_setURL(
+    custom_token: Contract, service_registry: Contract, get_accounts: Callable, web3: Web3
+) -> None:
     (A,) = get_accounts(1)
     url1 = "http://example.com"
     url2 = "http://raiden.example.com"
 
-    # First setHost call, should add to `service_addresses`
+    custom_token.functions.mint(SERVICE_DEPOSIT).call_and_transact({"from": A})
+    custom_token.functions.approve(service_registry.address, SERVICE_DEPOSIT).call_and_transact(
+        {"from": A}
+    )
+    tx = service_registry.functions.deposit(SERVICE_DEPOSIT).call_and_transact({"from": A})
+    tx_receipt = web3.eth.getTransactionReceipt(tx)
+    contract_manager = ContractManager(contracts_precompiled_path(version=None))
+    event_abi = contract_manager.get_event_abi(CONTRACT_SERVICE_REGISTRY, EVENT_REGISTERED_SERVICE)
+    event_data = get_event_data(event_abi, tx_receipt["logs"][-1])
+    assert event_data["args"]["service"] == A
+    assert event_data["args"]["deposit_contract"] != EMPTY_ADDRESS
+
     service_registry.functions.setURL(url1).call_and_transact({"from": A})
     assert service_registry.functions.urls(A).call() == url1
-    assert service_registry.functions.service_addresses(0).call() == A
-    assert service_registry.functions.serviceCount().call() == 1
-    with pytest.raises(TransactionFailed):
-        assert service_registry.functions.service_addresses(1).call()
 
-    # Setting the host for the second time must not add the service address a
-    # second time.
     service_registry.functions.setURL(url2).call_and_transact({"from": A})
     assert service_registry.functions.urls(A).call() == url2
-    assert service_registry.functions.service_addresses(0).call() == A
-    assert service_registry.functions.serviceCount().call() == 1
+
+
+def test_decayed_price(service_registry: Contract) -> None:
+    assert service_registry.functions.decayed_price(100000, 0).call() == 100000
+
+    # The minimum price is 1000
+    assert service_registry.functions.decayed_price(100, 0).call() == 1000
+
+    # roughly 139 days till the price halves.
+    assert service_registry.functions.decayed_price(100000, 11990300).call() == 50000
diff --git a/raiden_contracts/tests/utils/constants.py b/raiden_contracts/tests/utils/constants.py
index d1dc73bab..494586d50 100644
--- a/raiden_contracts/tests/utils/constants.py
+++ b/raiden_contracts/tests/utils/constants.py
@@ -17,6 +17,9 @@
 FAUCET_ALLOWANCE = 100 * int(units["ether"])
 CONTRACT_DEPLOYER_ADDRESS = FAUCET_ADDRESS
 NONEXISTENT_LOCKSROOT = b"\x00" * 32
+SECONDS_PER_DAY = 60 * 60 * 24
+
+SERVICE_DEPOSIT = 5000 * (10 ** 18)
 
 
 class TestLockIndex(IntEnum):
diff --git a/raiden_contracts/utils/versions.py b/raiden_contracts/utils/versions.py
index 144d0c98d..5ca0531a3 100644
--- a/raiden_contracts/utils/versions.py
+++ b/raiden_contracts/utils/versions.py
@@ -33,3 +33,14 @@ def contracts_version_provides_services(version: Optional[str]) -> bool:
     if version == "0.8.0_unlimited":
         return True
     return compare(version, "0.8.0") >= 0
+
+
+def contracts_version_has_initial_service_deposit(version: Optional[str]) -> bool:
+    if version is None:
+        # contracts_versoin == None means the stock version in development.
+        return True
+    if version == "0.3._":
+        return False
+    if version == "0.8.0_unlimited":
+        return False
+    return compare(version, "0.18.0") > 0