import { DecodedSignedTx, decodeSignedTx } from './decodeSignedTx';
import {
  DecodedSigningPayload,
  decodeSigningPayload
} from './decodeSigningPayload';

/**
 * Parse the transaction information from a signing payload OR from a signed tx
 *
 * @param data - The data to parse, should be a signing payload or a signed tx
 * @param metadataRpc - The SCALE-encoded metadata, as a hex string. Can be
 * retrieved via the RPC call `state_getMetadata`
 */
export function decode(
  data: string,
  metadataRpc: string
): DecodedSignedTx | DecodedSigningPayload {
  try {
    return decodeSignedTx(data, metadataRpc);
  } catch (error) {
    // do nothing
  }

  try {
    return decodeSigningPayload(data, metadataRpc);
  } catch (error) {
    // do nothing
  }

  throw new Error('data seems to be not a signing payload nor a signed tx');
}