interface JsonMessage {
  blockhash: string;
  blockHeight: number;
  blockID: number;
  blockTime: number;
  parentSlot: number;
  previousBlockhash: string;
  rewards: Array<{
    commission: null | number;
    lamports: number;
    postBalance: number;
    pubkey: string;
    rewardType: string;
  }>;
  transactions: Array<{
    meta: {
      computeUnitsConsumed: number;
      err: null | string;
      fee: number;
      innerInstructions: any[];
      loadedAddresses: {
        readonly: string[];
        writable: string[];
      };
      logMessages: string[];
      postBalances: number[];
      postTokenBalances: any[];
      preBalances: number[];
      preTokenBalances: any[];
      rewards: any[];
      status: {
        Ok: null | string;
      };
    };
    transaction: {
      message: {
        accountKeys: string[];
        header: {
          numReadonlySignedAccounts: number;
          numReadonlyUnsignedAccounts: number;
          numRequiredSignatures: number;
        };
        instructions: Array<{
          accounts: number[];
          data: string;
          programIdIndex: number;
          stackHeight: null | number;
        }>;
        recentBlockhash: string;
      };
      signatures: string[];
    };
    version: string;
  }>;
}