@dashevo/wallet-lib/src/types/Account/methods/getTransaction.js

Light wallet library for Dash

const EVENTS = require('../../../EVENTS');

/**
 * Get a transaction from a provided txid
 * @param {transactionId} txid - Transaction Hash
 * @return {Promise<{metadata: TransactionMetaData|null, transaction: Transaction}>}
 */
async function getTransaction(txid = null) {
  const { storage, network } = this;
  const chainStore = storage.getChainStore(network);
  const searchedTransaction = chainStore.getTransaction(txid);

  if (searchedTransaction) {
    return searchedTransaction;
  }

  const getTransactionResponse = await this.transport.getTransaction(txid);
  if (!getTransactionResponse) return null;
  const {
    transaction,
    blockHash,
    height,
    instantLocked,
    chainLocked,
  } = getTransactionResponse;

  const metadata = {
    blockHash,
    height,
    instantLocked,
    chainLocked,
  };
  if (this.cacheTx) {
    // We cache even if transaction / metadata are not final (case of unconfirmed tx)
    await this.importTransactions([[transaction, metadata]]);

    if (height) {
      if (this.cacheBlockHeaders) {
        const searchBlockHeader = this.storage.searchBlockHeader(height);
        if (!searchBlockHeader.found) {
          // Trigger caching of blockheader
          await this.getBlockHeader(height);
        }
      }
    } else {
      const self = this;
      // If not yet confirmed, recall at next block.
      this.once(
        EVENTS.BLOCKHEIGHT_CHANGED,
        () => {
          self.getTransaction(txid);
        },
      );
    }
  }
  return { transaction, metadata };
}

module.exports = getTransaction;