terminal :
root@bd9f085b553e:~/solana-curriculum/learn-how-to-interact-with-on-chain-programs# node src/client/main.js
Saying 'hello' to a Solana account
/workspace/solana-curriculum/learn-how-to-interact-with-on-chain-programs/node_modules/@solana/web3.js/lib/index.cjs.js:9560
throw new SendTransactionError('failed to send transaction: ' + res.error.message, logs);
^
SendTransactionError: failed to send transaction: Transaction simulation failed: Attempt to debit an account but found no record of a prior credit.
at Connection.sendEncodedTransaction (/workspace/solana-curriculum/learn-how-to-interact-with-on-chain-programs/node_modules/@solana/web3.js/lib/index.cjs.js:9560:13)
at process.processTicksAndRejections (node:internal/process/task_queues:95:5)
at async Connection.sendRawTransaction (/workspace/solana-curriculum/learn-how-to-interact-with-on-chain-programs/node_modules/@solana/web3.js/lib/index.cjs.js:9526:20)
at async Connection.sendTransaction (/workspace/solana-curriculum/learn-how-to-interact-with-on-chain-programs/node_modules/@solana/web3.js/lib/index.cjs.js:9517:12)
at async sendAndConfirmTransaction (/workspace/solana-curriculum/learn-how-to-interact-with-on-chain-programs/node_modules/@solana/web3.js/lib/index.cjs.js:2145:21)
at async createAccount (file:///workspace/solana-curriculum/learn-how-to-interact-with-on-chain-programs/src/client/hello-world.js:80:5)
at async checkProgram (file:///workspace/solana-curriculum/learn-how-to-interact-with-on-chain-programs/src/client/hello-world.js:55:9)
at async main (file:///workspace/solana-curriculum/learn-how-to-interact-with-on-chain-programs/src/client/main.js:12:5)
at async file:///workspace/solana-curriculum/learn-how-to-interact-with-on-chain-programs/src/client/main.js:18:1 {
logs: []
}
Node.js v18.17.1
code :
main.js
import { establishConnection, getProgramId, establishPayer, checkProgram, sayHello, getHelloCount, getAccountPubkey } from "./hello-world.js";
async function main() {
const connection = establishConnection();
console.log("Saying 'hello' to a Solana account");
const programId = await getProgramId();
const payer = await establishPayer();
const accountPubkey = await getAccountPubkey(payer, programId);
await checkProgram(connection, payer, programId, accountPubkey);
await sayHello(connection, payer, programId, accountPubkey);
const helloCount = await getHelloCount(connection, accountPubkey);
console.log(helloCount);
}
await main()
helloworld.js
//import { PublicKey } from "@metaplex-foundation/js";
import { Connection, PublicKey, Keypair, Transaction, TransactionInstruction, sendAndConfirmTransaction, SystemProgram } from "@solana/web3.js";
import { readFile } from "fs/promises"
import * as borsh from 'borsh';
class HelloWorldAccount {
constructor(fields) {
if (fields) {
this.counter = fields.counter;
}else {
this.counter = 0;
}
}
}
const HelloWorldSchema = new Map([
[HelloWorldAccount, { kind: 'struct', fields: [['counter', 'u32']] }]
]);
const ACCOUNT_SIZE = borsh.serialize(HelloWorldSchema, new HelloWorldAccount()).length;
export function establishConnection() {
const connection = new Connection('http://localhost:8899');
return connection;
}
export async function establishPayer(connection) {
let secretKeyString = await readFile("../../../workspace/.config/solana/id.json", 'utf-8');
let secretKey = Uint8Array.from(JSON.parse(secretKeyString));
return Keypair.fromSecretKey(secretKey);
}
export async function getProgramId() {
let secretKeyString = await readFile("dist/program/helloworld-keypair.json", 'utf8');
let secretKey = Uint8Array.from(JSON.parse(secretKeyString));
let keypair = Keypair.fromSecretKey(secretKey);
return keypair.publicKey;
}
export async function getAccountPubkey(payer, programId) {
return await PublicKey.createWithSeed(payer.publicKey, "ntg", programId);
}
export async function checkProgram(connection, payer, programId, accountPubkey) {
const accountInfo = await connection.getAccountInfo(programId);
if (accountInfo === null) {
throw new Error('Program account not found');
}
const dataAccountInfo = await connection.getAccountInfo(accountPubkey);
if (dataAccountInfo === null) {
await createAccount(connection, payer, programId, accountPubkey);
}
if (!accountInfo.executable) {
throw new Error('Program account is not executable');
}
return accountInfo;
}
export async function createAccount(connection, payer, programId, accountPubkey) {
let lamports = await connection.getMinimumBalanceForRentExemption(ACCOUNT_SIZE);
const instruction = {
basePubkey: payer.publicKey,
fromPubkey: payer.publicKey,
lamports,
newAccountPubkey: accountPubkey,
programId,
seed : "ntg",
space : ACCOUNT_SIZE,
};
const tx = SystemProgram.createAccountWithSeed(instruction);
const transaction = new Transaction();
transaction.add(tx);
await sendAndConfirmTransaction(connection, transaction, [payer]);
}
export async function sayHello(connection, payer, programId, accountPubkey) {
const transaction = {
keys: [{ pubkey: accountPubkey, isSigner: false, isWritable: true}],
programId,
data: Buffer.alloc(0),
}
const instruction = new TransactionInstruction(transaction);
await sendAndConfirmTransaction(connection, new Transaction().add(instruction), [payer]);
}
export async function getHelloCount(connection, accountPubkey) {
const accountInfo = await connection.getAccountInfo(accountPubkey);
const greeting = borsh.deserialize(HelloWorldSchema, HelloWorldAccount, accountInfo.data);
return greeting.counter;
}
iam not able to found the mistake in y code and
the newly generated key pair is stored in /workspace/.config/solana directory
