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Ethereum & EVM compatible

Sign Transaction​

The DCENT Web SDK provides functions for signing transaction of coins.

getEthereumSignedTransaction()​

Supported Coin Type​

  • ETHEREUM
  • RSK
  • XDC

Parameters​

  • coinType
  • nonce
  • gasPrice
  • gasLimit
  • to (address)
  • value
  • data
  • key path for signing
  • chain ID

Returned response object:​

{
    "header": {
        "version": "1.0",
        "response_from": "ethereum",
        "status": "success"
    },
    "body": {
        "command": "transaction",
        "parameter": {
            "sign_v": "0x78",
            "sign_r": "0xf9e4c3ed......9557ad37",
            "sign_s": "0x697a2abf......b76c4cb2",
            "signed": "f86c0884......b76c4cb2"
        }
    }
}

getTokenSignedTransaction()​

Supported Coin Type​

  • ERC20
  • RRC20
  • XRC20

Parameters​

  • coinType

  • nonce

  • gasPrice

  • gasLimit

  • value

  • key path for signing

  • chain ID

  • contract information example :

    {
      name: 'OmiseGO',
      address: '0xd26114cd6EE289AccF82350c8d8487fedB8A0C07',
      to: '0x354609C4c9a15d4265cF6D94010568D5Cf4d0c1B',
      decimals: 18,
      value: '100000000000000000',
      symbol: 'OMG'
    }

Returned response object​

{
    "header": {
        "version": "1.0",
        "response_from": "erc20",
        "status": "success"
    },
    "body": {
        "command": "transaction",
        "parameter": {
            "signed": "0xf8a91584......cc79c29a",
            "sign": {
                "sign_v": "0x26",
                "sign_r": "0x33930787......d4456f53",
                "sign_s": "0x708126c7......cc79c29a"
            }
        }
    }
}

Ethereum Signed Message​

You can get a signature value to sign a user message with that private key with a given key path (BIP32). The input message is prefixed with \x19Ethereum Signed Message:\n and the message length, then hashed and signed.

var message = 'This is a message!'
var result
try {
    result = await DcentWebConnector.getEthereumSignedMessage(message, "m/44'/60'/0'/0/0");
} catch (e) {
    console.log(e)
    result = e
}

Returned response object has:

{
    "header": {
        "version": "1.0",
        "response_from": "ethereum",
        "status": "success"
    },
    "body": {
        "command": "msg_sign",
        "parameter": {
            "address": "0x54b9c508aC61Eaf2CD8F9cA510ec3897CfB09382",
            "sign": "0x0d935339......06a6291b"
        }
    }
}

Signed Data​

You can get a signature value to sign message with that private key with a given key path (BIP32). The input data is hex string format. The input data is hashed and signed.

var message = "0x1901f2cee375fa42b42143804025fc449deafd50cc031ca257e0b194a650a912090feb4221181ff3f1a83ea7313993ca9218496e424604ba9492bb4052c03d5c3df8"
var key =  "m/44'/60'/0'/0/0"
var result
try {
    result = await DcentWebConnector.getSignedData(key, message);
} catch (e) {
    console.log(e)
    result = e
}

Returned response object has:

{
    "header": {
        "version": "1.0",
        "response_from": "ethereum",
        "status": "success"
    },
    "body": {
        "command": "sign_data",
        "parameter": {
            "address": "0x54b9c508aC61Eaf2CD8F9cA510ec3897CfB09382",
            "sign": "0x0d935339......06a6291b"
        }
    }
}

Signed Message​

You can get a signature value to sign a user message with that private key with a given key path (BIP32). The input message is prefixed depending on the coin type and then hashed and signed.

var message = 'This is a message!'
var key =  "m/44'/60'/0'/0/0"
var result
try {
    result = await DcentWebConnector.getSignedMessage( DcentWebConnector.coinType.ETHEREUM, key, message);
} catch (e) {
    console.log(e)
    result = e
}

Returned response object has:

{
    "header": {
        "version": "1.0",
        "response_from": "ethereum",
        "status": "success"
    },
    "body": {
        "command": "msg_sign",
        "parameter": {
            "address": "0x54b9c508aC61Eaf2CD8F9cA510ec3897CfB09382",
            "sign": "0x0d935339......06a6291b"
        }
    }
}