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 documentationweb3js.readthedocs.io

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.