The D'CENT Web SDK provides functions for signing transaction of coins.
const decode58Check = require('@tronscan/client/src/utils/crypto').decode58Check
const { Transaction } = require('@tronscan/client/src/protocol/core/Tron_pb')
const googleProtobufAnyPb = require('google-protobuf/google/protobuf/any_pb.js')
const _buf2hex = (buffer) => { // buffer is an ArrayBuffer
return Array.prototype.map.call(new Uint8Array(buffer), x => ('00' + x.toString(16)).slice(-2)).join('');
}
const baseURL = 'https://api.trongrid.io'
// get node info
const command = '/wallet/getnodeinfo'
const reponse = await axios.get(baseURL + command)
let dataInfo = response.data
let arrBlcokInfo = dataInfo.block.split(',')
const nodeInfo = {
number: arrBlcokInfo[0].split(':')[1],
hash: arrBlcokInfo[1].split(':')[1],
}
let transferContract = new TronscanSdk.TransferContract()
transferContract.setToAddress(Uint8Array.from(decode58Check(toAddr)))
transferContract.setOwnerAddress(Uint8Array.from(decode58Check(fromAddr)))
transferContract.setAmount(amount)
let anyValue = new googleProtobufAnyPb.Any();
anyValue.pack(transferContract.serializeBinary(), 'protocol.' + typeName)
let contract = new Transaction.Contract();
contract.setType(contractType)
contract.setParameter(anyValue)
const refBlockHash = Buffer.from(nodeInfo.hash, 'hex').slice(8, 16).toString('base64');
const blockNumber = Number(nodeInfo.number);
const refBlockBytes = getBlockBytes(blockNumber).toString('base64');
let raw = new Transaction.raw()
raw.addContract(contract);
raw.setRefBlockNum(blockNumber)
raw.setRefBlockBytes(refBlockBytes)
raw.setRefBlockHash(refBlockHash)
raw.setTimestamp(Date.now());
raw.setExpiration(Date.now() + (100 * 60 * 60 * 1000)) // 10 hours
if (contractType === Transaction.Contract.ContractType.TRIGGERSMARTCONTRACT) {
raw.setFeeLimit(50 * 1000000) // transfer fee limit
}
let transaction = new Transaction();
transaction.setRawData(raw);
const unsignedTx = _buf2hex(raw.serializeBinary())
const transactionJson = {
unsignedTx: unsignedTx,
fee: fee
path: `m/44'/195'/0'/0/0`,
}
var result
try {
result = await DcentWebConnector.getTronSignedTransaction(transactionJson);
} catch (e) {
console.log(e)
result = e
}
{
"header": {
"version": "1.0",
"response_from": "tron",
"status": "success"
},
"body": {
"command": "transaction",
"parameter": {
"signed_tx": "0x35544659743d463715380a2f66205ac9c38feb04033c29a5d415f8b009f566664a1972ac8be256308ec9b38a726f02eec103fc74963d7caf783cd55f1d7610d900",
"pubkey": "0x000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"
}
}
}
