openchain-sdk-yxl-ts/lib/common/operation/payAsset.js

OpenChain SDK for browser

import protobuf from 'protobufjs';
import long from 'long';
import bundleJson from '../../crypto/protobuf/bundle.js';

/**
 * payAsset operation
 * @param args
 * @return {payload}
 */
export default function (args) {
  try {
    const { sourceAddress, destAddress, code, issuer, assetAmount, metadata } = args;

    const root = protobuf.Root.fromJSON(bundleJson);

    const assetKey = root.lookupType('protocol.AssetKey');
    const assetKeyMsg = assetKey.create({
      issuer,
      code,
    });

    const asset = root.lookupType('protocol.Asset');
    const assetMsg = asset.create({
      key: assetKeyMsg,
      amount: long.fromValue(assetAmount),
    });

    const operationPayAsset = root.lookupType('protocol.OperationPayAsset');
    const operationPayAssetMsg = operationPayAsset.create({
      destAddress,
      asset: assetMsg,
    });

    const operation = root.lookupType('protocol.Operation');

    const payload = {
      payAsset: operationPayAssetMsg,
      type: operation.Type.PAY_ASSET,
    };

    if (sourceAddress) {
      payload.sourceAddress = sourceAddress;
    }

    if (metadata) {
      payload.metadata = Buffer.from(metadata, 'utf8');
    }

    const err = operation.verify(payload);

    if (err) {
      throw Error(err);
    }

    return operation.create(payload);
  } catch (err) {
    throw err;
  }
};