Add way to handle timeout errors and give callback on confirmation or failure.

[xjcaa]

Add way to handle timeout errors and give callback on confirmation or failure.

[xjcaa]

export const TIMEOUT_FAILURE: string = "Error: Transaction was not confirmed";
export const BLOCKHASH_FAILURE: string = "Error: failed to get recent blockhash";
export const RAW_TRANSACTION_FAILURE: string = "Error: Raw transaction";
export const TRANSACTION_SIMULATION_FAILURE: string = "Error: failed to send transaction";