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class 7.txt

@@ -92,17 +92,23 @@ GETH Installation:
 Steps to run a GETH node:
 --------------------------
 
-1. geth --datadir ethdata account new   
-2. nano genesis.json
+1. geth --datadir ethdata account new   ---> take backup or copy the address in this step
+2. nano genesis.json                    ---> copy the contents fro, genesis.jso file from github link (https://github.com/blockchaintraining90/batch6)
 3. geth --datadir=”ethdata” init genesis.json
 4. geth --datadir=”ethdata” --networkid 15 --nodiscover --networkid 1999 console
-5. web3.setEtherbase("0x3d2B8532E6f758068402DF5B4C105678C31cc4c7")
-5. miner.start()
-6. miner.stop()
+5. geth attach ipc:/home/corresponding VM name/”ethdata”/geth.ipc
+6. miner.setEtherbase("your account address")
+7. miner.start(8)
+8. web3.eth.getBalance("your account address")
 
-7. geth attach ipc:/home/goudjagadeeshgm/Downloads/”ethdata”/geth.ipc
 
-0x3d2B8532E6f758068402DF5B4C105678C31cc4c7
+Process to get accounts:
+-------------------------
+cd ethdata/
+cd keystore/
+copy the address
+use prefix of 0x
+
 
 
 

class 8.txt

@@ -0,0 +1,113 @@
+Genesis file is the configuration file to start the network for first time
+Genesis block is the first block in the chain/network
+
+
+get Genesis block details
+
+Query blockchain by blockid:
+-----------------------------
+
+block id = 0
+
+func querydata (blocknum int)
+
+
+https://web3js.readthedocs.io/en/v1.8.2/
+
+https://docs.ethers.org/v5/
+
+
+Fungible tokens --> erc20 ---> same token has same face value
+
+Non Fungible tokens --> erc721 --> diff tokens have diff values and attributes
+
+
+
+
+Enterprise Blockchains:
+-----------------------
+
+Reference links ---> https://www.hyperledger.org/
+
+
+ Sawtooth, Iroha, Burrow, Indy, Fabric, Corda
+
+90% ----> Fabric (praticals and labs on fabric)
+
+1. Security
+2. Faster block creation (uses diff consensus)
+3. No anonimity
+4. No Transaction/block fee
+
+
+5 top banks wants to join a CREDIT scoring ledger use case
+
+network details :
+
+{
+ bank1 (sbi), bank2 (axis), bank3 (icici), bank4 (idfc), bank5 (hsbc)
+ VPC network ---->
+}
+
+
+Sawtooth: Linux, IBM and Intel
+---------
+bank1 initiated a txn to store on the ledger for customer 1 data 
+
+{
+
+ validateCust()
+ validateaccountStatus()
+ validatecreditdata()
+ checkanydefaultlonas()
+
+}
+
+
+
+
+Iroha:
+------
+1. PBFT
+2. Light weight client applications
+
+Indy:
+-----
+1. DID's
+
+
+ generateDID (name, age, mobile, mail) -----> DID0980-9890jhghgkh97979
+
+Name: Akshay , Graduate
+
+ DID1 --> college fee reiumbersment program
+ DID2 --> Scholarships from international colleges
+ DID3 --> graduation details for eligible
+
+
+Burrow/Besu:
+-------------
+1. ethereum specific use cases
+2. solidty for smart comtracts
+3. no gas fee/txn fee
+4. can be used by enterprises
+
+
+
+
+
+ Ethereum --- solidity, web3.js, ethers.js
+ Indy     --- Decentralized identity (read thru)
+ Fabric   --- 80% of enterprise adopt this (node js, java, golang)
+ Corda    --- (java, kotlin)
+
+
+
+TRuffle:
+---------
+
+sudo truffle migrate inside the Metacoin directory
+
+Hardhat:
+---------
+

genesis.json.txt

@@ -1,5 +1,6 @@
-Create genesis file:
-----------------------
+Create genesis file: (Proof of Work)
+-------------------------------------
+
 {
 "nonce": "0x0000000000000042",
 "timestamp": "0x00",
@@ -19,3 +20,40 @@ Create genesis file:
 "eip158Block": 0
 }
 }
+
+nonce --> 64 bit hash value specified in hexadecimal for genesis block to start with (nonce should start with 98980980987097098798)
+
+timestamp --> indicates when the network started/deployed
+               march 19 2023, 8:55 PM IST ----> 12365468768 ----> 0xx897907987
+
+ParentHash ---> hexadecimal value which says previous block hash
+
+extraData  ---> unique hexadecimal value while starting the network (unique data thru which u can identify the network)
+
+gaslimit   ---> max gaslimit that can be consumed
+
+difficulty ---> random value for each and every block in hexadecimal
+
+mixhash    ---> combination if nonce and difficulty
+
+coinbase   ---> specify the miner address as part of network (10 node address for miner process)
+
+chainid    ---> unique id for each and every blockchain (1--> Maninet, 5--> Goerli, 7545 -- Ganache)
+
+eipblocks  ---> we start the network with latest EIP blocks
+
+
+
+https://www.asynclabs.co/blog/blockchain-development/params-in-ethereum-genesis-block-explained/
+
+process of publishing the changes to protocol is EIP (Ethererum improvement proposals)
+
+2017  ---> ERC20
+
+2019  ---> ERC721
+
+2021  ---> ERC1155
+
+2023  ---> ERC4337
+
+https://eips.ethereum.org/