36 lines
1.5 KiB
JavaScript
36 lines
1.5 KiB
JavaScript
import { Buffer } from 'buffer'
|
|
import base58 from 'bs58'
|
|
import cc from 'five-bells-condition'
|
|
import clone from 'clone'
|
|
|
|
import serializeTransactionIntoCanonicalString from './serializeTransactionIntoCanonicalString'
|
|
|
|
|
|
/**
|
|
* @public
|
|
* Sign the given `transaction` with the given `privateKey`s, returning a new copy of `transaction`
|
|
* that's been signed.
|
|
* Note: Only generates Ed25519 Fulfillments. Thresholds and other types of Fulfillments are left as
|
|
* an exercise for the user.
|
|
* @param {object} transaction Transaction to sign. `transaction` is not modified.
|
|
* @param {...string} privateKeys Private keys associated with the issuers of the `transaction`.
|
|
* Looped through to iteratively sign any Input Fulfillments found in
|
|
* the `transaction`.
|
|
* @returns {object} The signed version of `transaction`.
|
|
*/
|
|
export default function signTransaction(transaction, ...privateKeys) {
|
|
const signedTx = clone(transaction)
|
|
signedTx.inputs.forEach((input, index) => {
|
|
const privateKey = privateKeys[index]
|
|
const privateKeyBuffer = new Buffer(base58.decode(privateKey))
|
|
const serializedTransaction = serializeTransactionIntoCanonicalString(transaction)
|
|
const ed25519Fulfillment = new cc.Ed25519Sha256()
|
|
ed25519Fulfillment.sign(new Buffer(serializedTransaction), privateKeyBuffer)
|
|
const fulfillmentUri = ed25519Fulfillment.serializeUri()
|
|
|
|
input.fulfillment = fulfillmentUri
|
|
})
|
|
|
|
return signedTx
|
|
}
|