decash-utils

Utilities for building on top of DeCash - the most easy-to-use and technically perfected stablecoin.

Read more about DeCash at docs.decash.com. Find the DeCash API reference here.

Installation

npm install --save decash-utils

Usage

algorandDecodeSignature({ logicsig })

This example demonstrates how to decode a logic signature, which:

1. Shows whether the sender is a Delegated Wallet (when senderDelegatedWallet is returned).
2. Gets properties (like the owner or seed) of this Delegated Wallet.

import { algorandDecodeSignature } from 'decash-utils';

// A part of the response from {Algorand Indexer (testnet)}/v2/blocks/21198914
const { senderDelegatedWallet } = algorandDecodeSignature({
  logicsig: {
    args: ['AA=='],
    logic:
      'BSACAAEmASDK6flECgvcY5MQRC3FjvVNKytcXjCk4eLKQJV+0fIxjShIgYCAgICAgICAAEgxIDIDEkQtFyMSQACHLRciEkAAeAAiNQA0ADIEDEEAfjQAOBCBBhJAAA8iQAAJNAAjCDUAQv/hI0M0ADgYgeCq7qGAgICAABJAAAQiQv/cNAA4GzEWDUAABCJC/840ADEWwhoiI1I0AUAAG4ABThJAAAQiQv+1NAA0AMIaIiNSgAF2EkL/pYABWUL/4ogAEDUBQv+BLjEXKAQ1AUL/dwAiNQA0ADIEDEEAFDQAOAAoEkAACTQAIwg1AEL/5iOJIok=',
  },
});

if (senderDelegatedWallet) {
  console.log(`
    The transaction sender is DeCash Delegated Wallet, owned by ${senderDelegatedWallet.owner};
    Wallet's seed: ${senderDelegatedWallet.seed};
    Validator smart contract ID: ${senderDelegatedWallet.validatorAppId}.
  `);
} else {
  console.log('The transaction sender is not a DeCash Delegated Wallet.');
}

algorandGetDelegatedWalletAddress({ owner, seed, validatorAppId })

Returns the address of the Delegated Wallet with the given owner, validatorAppId and optional seed.

import { algorandGetDelegatedWalletAddress } from 'decash-utils';

const address = algorandGetDelegatedWalletAddress({
  owner: 'ZLU7SRAKBPOGHEYQIQW4LDXVJUVSWXC6GCSODYWKICKX5UPSGGGYQCH654',
  validatorAppId: 71013728, // Network-dependent. Get the validator APP ID from https://docs.decash.com/docs/concepts/delegated-wallets#verifier
});
// address = 'QCLGDBMIGC5EV4WA4J4TZCUKZURQ5BORMC3WQYBWJCXDILCDQFLPMT4ZCE'

algorandGetDelegatedWalletLogicSig({ owner, seed, validatorAppId })

This example demonstrates how to get the logic signature of a DeCash Delegated Wallet, which then can be used to sing transaction outgoing from the Delegated Wallet.

import { LogicSigAccount, signLogicSigTransaction } from 'algosdk';
import { algorandGetDelegatedWalletLogicSig } from 'decash-utils';

const delegatedWalletCode = algorandGetDelegatedWalletLogicSig({
  owner: '6E63EKJYUPLL4SKM5FNX3PD7HSWZ26XPS7BXYLVWJAPDEK3VA7DERTFV4E', // The owner of the delegated wallet.
  seed: 0, // Optional. Default is 0.
  validatorAppId: 71013728, // Network-dependent. Get the validator APP ID from https://docs.decash.com/docs/concepts/delegated-wallets#verifier
});

const logicSigAccount: LogicSigAccount = new LogicSigAccount(
  delegatedWalletCode,
  [new Buffer.from('\x00')] // "Self-sign"
);
const signedTx = signLogicSigTransaction(txn, logicSigAccount).blob;

Utility functions

You can use these exported utility functions for various purposes.

import {
  algorandAddressToUInt8Array,
  base32ToUInt8Array,
  base64ToUInt8Array,
  uInt8ArrayToAlgorandAddress,
  uInt8ArrayToBase32,
  uInt8ArrayToBase64,
  uInt8ArrayToVarInt,
  varIntToUInt8Array,
} from 'decash-utils';

Development

To make a new package version,

1. Add your new code and tests.
2. Update the package version in package.json.
3. Push or pull request to main. The package will be deployed by GitHub Workflows.

License

MIT © DeCash