Connect to MultiVAC via Web3

Web3, MTV

The MultiVAC mainnet supports EVM (Ethereum virtual machine), so you can use Ethereum's web3 tools to connect to MultiVAC.

Web3 API docs:

web3.js - Ethereum JavaScript API — web3.js 1.0.0 documentation

Connect to MultiVAC Mainnet:

const web3 = new Web3('https://rpc.mtv.ac');

Or you can use websocket:

const web3 = new Web3('https://websocket.mtv.ac');

Get the number of the recent block:

web3.eth.getBlockNumber()
.then(console.log);
> 4475231

Get account balance:

web3.eth.getBalance("0xB64BA36f4F8BC2AC451940e36f978A368C6B2d5A")
.then(console.log);
> "99844290333000000000"

Get a transaction:

web3.eth.getTransaction('0xdd7076df246df862f37538974acf4fd3a3bd535af7e9ec6991939da9ffc43908')
.then(console.log);

> {
  blockHash: "0x0814fbeeacee4b2ce0653e16a169acec9eacc08c94644d901c72ac5e50708642",
  blockNumber: 4465645,
  from: "0x00000df3e3e1f1b1212b8bdb8896df4442f13a4c",
  gas: 100000,
  gasPrice: 1000000000,
  hash: "0xdd7076df246df862f37538974acf4fd3a3bd535af7e9ec6991939da9ffc43908",
  input: "0x",
  nonce: 6950514,
  r: "0xf52dff98e28dc687b7cea0035bb6b69213453c63d293204cf854065890f7befb",
  s: "0x4a2e672ccdd9667f1bab500f8da4cf4b68c310832c22c5af272162a1a97e5f10",
  to: "0x147de9adb01dbbf567c5c97d6478a37b1a3236ca",
  transactionIndex: 5,
  type: "0x0",
  v: "0x1e95d",
  value: 2169045532468861238
}

Send a transaction:

// compiled solidity source code using https://remix.ethereum.org
var code = "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// This is the code to deploy MRC20 token

// using the callback
web3.eth.sendTransaction({
    from: '0xB64BA36f4F8BC2AC451940e36f978A368C6B2d5A',
    data: code // deploying a contract
}, function(error, hash){
    ...
});

// using the promise
web3.eth.sendTransaction({
    from: '0xB64BA36f4F8BC2AC451940e36f978A368C6B2d5A',
    to: '0xB594c29B37c458DEC0Eb5a2ebe47b89b40bc16Fc',
    value: '1000000000000000'
})
.then(function(receipt){
    ...
});


// using the event emitter
web3.eth.sendTransaction({
    from: '0xB64BA36f4F8BC2AC451940e36f978A368C6B2d5A',
    to: '0xB594c29B37c458DEC0Eb5a2ebe47b89b40bc16Fc',
    value: '1000000000000000'
})
.on('transactionHash', function(hash){
    ...
})
.on('receipt', function(receipt){
    ...
})
.on('confirmation', function(confirmationNumber, receipt){ ... })
.on('error', console.error); // If a out of gas error, the second parameter is the receipt.

MultiVAC supports most of the Web3 interfaces. If you just deploy contracts, process transaction information, and send transactions, MultiVAC's web3 interface and return value are no different from Ethereum's. However, in the return value of Block information, the definition of some fields may be significantly different from Ethereum. Please see this article for specific differences.