SPV maintainer compatible with Bitcoin testnet and SepoliaLightRelay contract

docs/resources/client-start-help

@@ -31,7 +31,7 @@ Flags:
       --tbtc.preParamsGenerationTimeout duration            tECDSA pre-parameters generation timeout. (default 2m0s)
       --tbtc.preParamsGenerationDelay duration              tECDSA pre-parameters generation delay. (default 10s)
       --tbtc.preParamsGenerationConcurrency int             tECDSA pre-parameters generation concurrency. (default 1)
-      --tbtc.keyGenerationConcurrency int                   tECDSA key generation concurrency. (default number of cores)
+      --tbtc.keyGenerationConcurrency int                   tECDSA key generation concurrency. (default 10)
       --developer.bridgeAddress string                      Address of the Bridge smart contract
       --developer.maintainerProxyAddress string             Address of the MaintainerProxy smart contract
       --developer.lightRelayAddress string                  Address of the LightRelay smart contract

pkg/chain/ethereum/beacon/gen/_address/RandomBeacon

@@ -0,0 +1 @@
+0x02CBA6D77CF9fB019e322c55b34c9d42f2eF4D74

pkg/chain/ethereum/ecdsa/gen/_address/WalletRegistry

@@ -0,0 +1 @@
+0x2DfC89675AB5Fb5Be7c2A86d373Daac3E795fc25

pkg/chain/ethereum/tbtc.go

@@ -49,6 +49,7 @@ type TbtcChain struct {
 	walletRegistry    *ecdsacontract.WalletRegistry
 	sortitionPool     *ecdsacontract.EcdsaSortitionPool
 	walletCoordinator *tbtccontract.WalletCoordinator
+	lightRelay        *tbtccontract.LightRelay
 }
 
 // NewTbtcChain construct a new instance of the TBTC-specific Ethereum
@@ -194,13 +195,42 @@ func newTbtcChain(
 		)
 	}
 
+	lightRelayAddress, err := config.ContractAddress(
+		LightRelayContractName,
+	)
+	if err != nil {
+		return nil, fmt.Errorf(
+			"failed to attach to LightRelay contract: [%w]",
+			err,
+		)
+	}
+
+	lightRelay, err :=
+		tbtccontract.NewLightRelay(
+			lightRelayAddress,
+			baseChain.chainID,
+			baseChain.key,
+			baseChain.client,
+			baseChain.nonceManager,
+			baseChain.miningWaiter,
+			baseChain.blockCounter,
+			baseChain.transactionMutex,
+		)
+	if err != nil {
+		return nil, fmt.Errorf(
+			"failed to attach to LightRelay contract: [%w]",
+			err,
+		)
+	}
+
 	return &TbtcChain{
 		baseChain:         baseChain,
 		bridge:            bridge,
 		maintainerProxy:   maintainerProxy,
 		walletRegistry:    walletRegistry,
 		sortitionPool:     sortitionPool,
 		walletCoordinator: walletCoordinator,
+		lightRelay:        lightRelay,
 	}, nil
 }
 
@@ -1449,6 +1479,11 @@ func (tc *TbtcChain) SubmitRedemptionProofWithReimbursement(
 		TxOutputValue: uint64(mainUTXO.Value),
 	}
 
+	_, err := tc.lightRelay.SetDifficultyFromHeaders(sweepProof.BitcoinHeaders)
+	if err != nil {
+		return err
+	}
+
 	gasEstimate, err := tc.maintainerProxy.SubmitRedemptionProofGasEstimate(
 		bitcoinTxInfo,
 		sweepProof,
@@ -1525,6 +1560,11 @@ func (tc *TbtcChain) SubmitDepositSweepProofWithReimbursement(
 		TxOutputValue: uint64(mainUTXO.Value),
 	}
 
+	_, err := tc.lightRelay.SetDifficultyFromHeaders(sweepProof.BitcoinHeaders)
+	if err != nil {
+		return err
+	}
+
 	gasEstimate, err := tc.maintainerProxy.SubmitDepositSweepProofGasEstimate(
 		bitcoinTxInfo,
 		sweepProof,

pkg/chain/ethereum/tbtc/gen/_address/Bridge

@@ -0,0 +1 @@
+0x9b1a7fE5a16A15F2f9475C5B231750598b113403

pkg/chain/ethereum/tbtc/gen/_address/LightRelay

@@ -0,0 +1 @@
+0x998D17122dA4ed98e558198665984E08D1cEAA8d

pkg/chain/ethereum/tbtc/gen/_address/LightRelayMaintainerProxy

@@ -0,0 +1 @@
+0xA669AC294BCf04CEeB5EBC26d9E1bF4fc4574e06

pkg/chain/ethereum/tbtc/gen/_address/MaintainerProxy

@@ -0,0 +1 @@
+0xCE85405123Ed0DC2596B4FCB9a2Fe15Bc59ff886

pkg/chain/ethereum/tbtc/gen/_address/WalletCoordinator

@@ -1 +1 @@
-
+0x4ABE632d4fb69b895A242616b09C5596D6D8de7F