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January 14, 2022 04:58
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Solana 101: Set Data on Solana Blockchain (From Figment.io's Solana 101 Course)
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import { | |
Connection, | |
PublicKey, | |
Keypair, | |
TransactionInstruction, | |
Transaction, | |
sendAndConfirmTransaction, | |
} from '@solana/web3.js'; | |
import type {NextApiRequest, NextApiResponse} from 'next'; | |
import {getNodeURL} from '@figment-solana/lib'; | |
export default async function setter( | |
req: NextApiRequest, | |
res: NextApiResponse<string>, | |
) { | |
try { | |
const {greeter, secret, programId, network} = req.body; | |
const url = getNodeURL(network); | |
const connection = new Connection(url, 'confirmed'); | |
const greeterPublicKey = new PublicKey(greeter); | |
const programKey = new PublicKey(programId); | |
const payerSecretKey = new Uint8Array(JSON.parse(secret)); | |
const payerKeypair = Keypair.fromSecretKey(payerSecretKey); | |
// this your turn to figure out | |
// how to create this instruction | |
const instruction = new TransactionInstruction({ | |
keys: [{pubkey: greeterPublicKey, isSigner: false, isWritable: true}], | |
programId: programKey, | |
data: Buffer.alloc(0), | |
}); | |
// this your turn to figure out | |
// how to create this transaction | |
const hash = await sendAndConfirmTransaction( | |
connection, | |
new Transaction().add(instruction), | |
[payerKeypair] | |
); | |
res.status(200).json(hash); | |
} catch (error) { | |
console.error(error); | |
res.status(500).json('Get balance failed'); | |
} | |
} |
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