Updated on March 20, 2020

Use the multinode example in the web3js-eea client library

To use the examples provided in the web3js-eea library with your privacy network:

  1. Clone the PegaSysEng/web3js-eea repository:

    git clone https://github.com/PegaSysEng/web3js-eea
    
  2. In the web3js-eea directory:

    npm install
    
  3. In the example directory, update the keys.js file to include:

    • Orion node public keys
    • Hyperledger Besu node RPC URLs
    • Hyperledger Besu node private keys.
  4. If the chainID specified in the genesis file for your network is not 2018, update deployContract.js, storeValueFromNode1.js, and storeValueFromNode2.js to specify your chain ID instead of 2018.

  5. In the example/multiNodeExample directory, deploy the contract:

    node deployContract.js
    

    A private transaction receipt returns.

    Transaction Hash  0x23b57ddc3ecf9c9a548e4401a411420ffc0002fd259a86d5656add7c6108beeb
    Waiting for transaction to be mined ...
    Private Transaction Receipt
     { contractAddress: '0xfee84481da8f4b9a998dfacb38091b3145bb01ab',
      from: '0x9811ebc35d7b06b3fa8dc5809a1f9c52751e1deb',
      to: null,
      output:
       '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',
      logs: [] }
    
  6. Copy the contract address from the private transaction receipt and set the CONTRACT_ADDRESS environment variable:

    export CONTRACT_ADDRESS=<Contract Address from Private Transaction Receipt>
    

    Example

    export CONTRACT_ADDRESS=0xfee84481da8f4b9a998dfacb38091b3145bb01ab
    
  7. Store a value in the contract from Node 1:

    node storeValueFromNode1.js
    

    Node 1 stores the value of 1000 (3e8 in hex) and is visible to Node 1 and Node 2.

    Transaction Hash: 0xd9d71cc6f64675e1a48183ded8f08930af317eb883ebae4c4eec66ae68618d85
    Waiting for transaction to be mined ...
    Event Emited: 0x0000000000000000000000009811ebc35d7b06b3fa8dc5809a1f9c52751e1deb00000000000000000000000000000000000000000000000000000000000003e8
    Waiting for transaction to be mined ...
    Get Value from http://localhost:8545: 0x00000000000000000000000000000000000000000000000000000000000003e8
    Waiting for transaction to be mined ...
    Get Value from http://localhost:8546: 0x00000000000000000000000000000000000000000000000000000000000003e8
    Waiting for transaction to be mined ...
    Get Value from http://localhost:8547: 0x
    
  8. Store a value in the contract from Node 2:

    node storeValueFromNode2.js
    

    Node 2 stores the value of 42 (2a in hex) and is visible to Node 1 and Node 2.

    Transaction Hash: 0xa025433aec47a71b0230f12f43708812fd38ff7b7c1dc89a715f71dcbd5fbdbf
    Waiting for transaction to be mined ...
    Event Emited: 0x000000000000000000000000372a70ace72b02cc7f1757183f98c620254f9c8d000000000000000000000000000000000000000000000000000000000000002a
    Waiting for transaction to be mined ...
    Get Value from http://localhost:8545: 0x000000000000000000000000000000000000000000000000000000000000002a
    Waiting for transaction to be mined ...
    Get Value from http://localhost:8546: 0x000000000000000000000000000000000000000000000000000000000000002a
    Waiting for transaction to be mined ...
    Get Value from http://localhost:8547: 0x
    

    Note

    As expected, log messages indicate that Node 3 Orion cannot find payloads because Node 3 does not have access to the private transactions between Node 1 and Node 2.