add
Adds an instruction to the given transaction, and returns the updated transaction.
Return
base64 encoded Solana transaction. Null if an error occurred.
Parameters
encoded_tx
base64 encoded Solana transaction.
instruction
json encoded instruction. Here is an example: {"programId":"11111111111111111111111111111111","accounts":[{"pubkey":"YUz1AupPEy1vttBeDS7sXYZFhQJppcXMzjDiDx18Srf","isSigner":true,"isWritable":true},{"pubkey":"d8DiHEeHKdXkM2ZupT86mrvavhmJwUZjHPCzMiB5Lqb","isSigner":false,"isWritable":true}],"data":"3Bxs4Z6oyhaczjLK"}