@bsv/sdk
Version:
BSV Blockchain Software Development Kit
45 lines • 1.75 kB
JavaScript
import Transaction from '../transaction/Transaction.js';
import LockingScript from '../script/LockingScript.js';
/**
* @method fromUtxo
*
* @description
* This function creates a transaction input from a utxo json object
* The idea being old code that uses utxos rather than sourceTranactions can convert using this.
*
* @deprecated
* This approach is made available for compatibility only. It is deprecated in favor of using sourceTransactions
* directly. It's recommended that wallets general keep transactions which store unspent outputs in their entirety,
* along with corresonding Merkle paths. The reason you would keep the whole transaction is such that you can prove
* the txid, and therefore its inclusion within a specific block.
*
* @example
* const i = fromUtxo({
* txid: '434555433eaca96dff6e71a4d02febd0dd3832e5ca4e5734623ca914522e17d5',
* vout: 0,
* script: '51',
* satoshis: 1234
* }, new P2PKH().unlock(p))
*
* tx.addInput(i)
*
* @param utxo: jsonUtxo
* @param unlockingScriptTemplate: { sign: (tx: Transaction, inputIndex: number) => Promise<UnlockingScript>, estimateLength: (tx: Transaction, inputIndex: number) => Promise<number> }
* @returns
*/
export default function fromUtxo(utxo, unlockingScriptTemplate) {
const sourceTransaction = new Transaction(0, [], [], 0);
sourceTransaction.outputs = Array(utxo.vout + 1).fill(null);
sourceTransaction.outputs[utxo.vout] = {
satoshis: utxo.satoshis,
lockingScript: LockingScript.fromHex(utxo.script)
};
return {
sourceTransaction,
sourceTXID: utxo.txid,
sourceOutputIndex: utxo.vout,
unlockingScriptTemplate,
sequence: 0xffffffff
};
}
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