@solana/spl-token
Version:
SPL Token Program JS API
42 lines • 1.98 kB
JavaScript
import { PUBLIC_KEY_LENGTH, PublicKey } from '@solana/web3.js';
import { TokenTransferHookAccountDataNotFound, TokenTransferHookInvalidPubkeyData, TokenTransferHookPubkeyDataTooSmall, TokenTransferHookAccountNotFound, } from '../../errors.js';
export async function unpackPubkeyData(keyDataConfig, previousMetas, instructionData, connection) {
const [discriminator, ...rest] = keyDataConfig;
const remaining = new Uint8Array(rest);
switch (discriminator) {
case 1:
return unpackPubkeyDataFromInstructionData(remaining, instructionData);
case 2:
return unpackPubkeyDataFromAccountData(remaining, previousMetas, connection);
default:
throw new TokenTransferHookInvalidPubkeyData();
}
}
function unpackPubkeyDataFromInstructionData(remaining, instructionData) {
if (remaining.length < 1) {
throw new TokenTransferHookInvalidPubkeyData();
}
const dataIndex = remaining[0];
if (instructionData.length < dataIndex + PUBLIC_KEY_LENGTH) {
throw new TokenTransferHookPubkeyDataTooSmall();
}
return new PublicKey(instructionData.subarray(dataIndex, dataIndex + PUBLIC_KEY_LENGTH));
}
async function unpackPubkeyDataFromAccountData(remaining, previousMetas, connection) {
if (remaining.length < 2) {
throw new TokenTransferHookInvalidPubkeyData();
}
const [accountIndex, dataIndex] = remaining;
if (previousMetas.length <= accountIndex) {
throw new TokenTransferHookAccountDataNotFound();
}
const accountInfo = await connection.getAccountInfo(previousMetas[accountIndex].pubkey);
if (accountInfo == null) {
throw new TokenTransferHookAccountNotFound();
}
if (accountInfo.data.length < dataIndex + PUBLIC_KEY_LENGTH) {
throw new TokenTransferHookPubkeyDataTooSmall();
}
return new PublicKey(accountInfo.data.subarray(dataIndex, dataIndex + PUBLIC_KEY_LENGTH));
}
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