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Algorand

Sign Transaction​

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

getAlgorandSignedTransaction()​

Supported Coin Type​

  • ALGORAND
  • ALGORAND_ASSET
  • ALGORAND_APP
  • ALGORAND_TESTNET
  • ALGORAND_ASSET_TESTNET
  • ALGORAND_APP_TESTNET

Parameters​

  • unsignedTx: unsigned hexadecimal tx Algorand Developer Transaction Reference Docs
  • path: key path, wallet sign with that private key with a given key path (BIP32 ex) "m/44'/283'/0'/0/0").
  • fee: fee, It is fee that wallet displays on the screen.
  • symbol: symbol, It is a symbol that the wallet displays on the screen.
  • decimals: algorand or algorand token's decimals.
  • optionParam: hexadecimal value of the algorand method type is used only in algorand token.
    • '00' : ALGORAND Transfer
    • '01' : ALGORAND ASSET Transfer
    • '02' : ALGORAND ASSET OPTIN
    • '03' : ALGORAND APP Contract call
    • '04' : ALGORAND APP OPTIN
    • '05' : ALGORAND ASSET FT Create
    • '06' : ALGORAND ASSET NFT Create

Requirements​

  • DCENT Bridge version 1.5.2 or higher is required.
  • DCENT Biometric Wallet version 2.29.1 or higher is required.

Usage​

import algosdk from 'algosdk'

const algodClient = new algosdk.Algodv2('', 'https://mainnet-api.algonode.cloud', '')
const indexerClient = new algosdk.Indexer('', 'https://mainnet-idx.algonode.cloud', '')

// An account for Algorand should keep cost for maintaining the account.
const balanceInfo = await algodClient.accountInformation(walletAddress).do()
const balance = balanceInfo.amount.toString()
const maintenance = balanceInfo['min-balance'].toString()

// Make a transaction
const suggestedParams = await algodClient.getTransactionParams().do()
const tx = algosdk.makePaymentTxnWithSuggestedParamsFromObject({
  suggestedParams,
  from: walletAddress,
  to: someWhere,
  amount: value,  // Unit is microAlgos
  memo: new Uint8Array(Buffer.from('Something what you want', 'hex')) || undefined
})

// Create JSON-formatted data for getting a signature
const unsignedRawData = Uint8ArrayToHex(tx.bytesToSign())
const sigHash = unsignedRawData

const transactionJson = {
    coinType: DcentWebConnector.coinType.ALGORAND,
    sigHash: unsignedRawData,
    path: `m/44'/283'/0'/0/0`,
    decimals: 6,  // for ALGORAND
    fee: tx.fee,
    symbol: 'ALGO',
    optionParam: '00'
}

var result
try {
    result = await DcentWebConnector.getAlgorandSignedTransaction(transactionJson);  
} catch (e) {
    console.log(e)
    result = e
}

Returned response object​

{
    "header": {
        "version": "1.0",
        "response_from": "algorand",
        "status": "success"
    },
    "body": {
        "command": "transaction",
        "parameter": {
            "signed_tx": "31aa13b5e04cb6fc6381ea0520bf7f6727ebdb6e96cd7ca8625bb3e3dd36cf0e2cee4ece13aa9f7ddc09ee10c74aa00af954201829d8016317f10f5a921dcc0d"
        }
    }
}