message: add reward program id to utility function
diff: @@ -35,8 +35,15 @@ export default class RewardPool {
  return await (await this.getRewardPool()).methods.numPaymentCycles().call();
  }
  - async getBalanceForProof(tokenAddress: string, address: string, proof: string): Promise<string> {
  - return (await this.getRewardPool()).methods.balanceForProofWithAddress(tokenAddress, address, proof).call();
  + async getBalanceForProof(
  + rewardProgramId: string,
  + tokenAddress: string,
  + address: string,
  + proof: string
  + ): Promise<string> {
  + return (await this.getRewardPool()).methods
  + .balanceForProofWithAddress(rewardProgramId, tokenAddress, address, proof)
  + .call();
  }
  async rewardTokensAvailable(address: string, rewardProgramId?: string): Promise<string[]> {
  