js-bigchaindb-driver/src/transaction/makeSha256Condition.js

24 lines
775 B
JavaScript

import { Buffer } from 'buffer'
import cc from 'five-bells-condition'
import ccJsonify from './utils/ccJsonify'
/**
* @public
* Create a Preimage-Sha256 Cryptocondition from a secret to put into an Output of a Transaction
* @param {string} preimage Preimage to be hashed and wrapped in a crypto-condition
* @param {boolean} [json=true] If true returns a json object otherwise a crypto-condition type
* @returns {object} Preimage-Sha256 Condition (that will need to wrapped in an Output)
*/
export default function makeSha256Condition(preimage, json = true) {
const sha256Fulfillment = new cc.PreimageSha256()
sha256Fulfillment.preimage = new Buffer(preimage)
if (json) {
return ccJsonify(sha256Fulfillment)
}
return sha256Fulfillment
}