message: Introduce BridgeValidationResult interface
diff: @@ -19,6 +19,12 @@ export interface ITokenBridgeHomeSide {
  waitForBridgingToLayer2Completed(recipientAddress: string, fromBlock: string): Promise<TransactionReceipt>;
  }
  +export interface BridgeValidationResult {
  + messageId: string;
  + encodedData: string;
  + signatures: string[];
  +}
  +
  const POLL_INTERVAL = 1000;
  const TIMEOUT = 1000 * 60 * 5;
  const bridgedTokensQuery = `
  @@ -107,10 +113,7 @@ export default class TokenBridgeHomeSide implements ITokenBridgeHomeSide {
  return result;
  }
  - async waitForBridgingValidation(
  - fromBlock: number,
  - bridgingTxnHash: string
  - ): Promise<{ messageId: string; encodedData: string; signatures: string[] }> {
  + async waitForBridgingValidation(fromBlock: string, bridgingTxnHash: string): Promise<BridgeValidationResult> {
  let signatureEvents: EventData[] | undefined;
  let homeAmb = new this.layer2Web3.eth.Contract(
  HomeAMBABI as AbiItem[],
  