@solana/spl-token
Version:
SPL Token Program JS API
67 lines • 2.36 kB
JavaScript
import { struct, u8 } from '@solana/buffer-layout';
import { bool, publicKey } from '@solana/buffer-layout-utils';
import { TOKEN_PROGRAM_ID } from '../constants.js';
import { TokenAccountNotFoundError, TokenInvalidAccountOwnerError, TokenInvalidAccountSizeError } from '../errors.js';
/** Buffer layout for de/serializing a multisig */
export const MultisigLayout = struct([
u8('m'),
u8('n'),
bool('isInitialized'),
publicKey('signer1'),
publicKey('signer2'),
publicKey('signer3'),
publicKey('signer4'),
publicKey('signer5'),
publicKey('signer6'),
publicKey('signer7'),
publicKey('signer8'),
publicKey('signer9'),
publicKey('signer10'),
publicKey('signer11'),
]);
/** Byte length of a multisig */
export const MULTISIG_SIZE = MultisigLayout.span;
/**
* Retrieve information about a multisig
*
* @param connection Connection to use
* @param address Multisig account
* @param commitment Desired level of commitment for querying the state
* @param programId SPL Token program account
*
* @return Multisig information
*/
export async function getMultisig(connection, address, commitment, programId = TOKEN_PROGRAM_ID) {
const info = await connection.getAccountInfo(address, commitment);
return unpackMultisig(address, info, programId);
}
/**
* Unpack a multisig
*
* @param address Multisig account
* @param info Multisig account data
* @param programId SPL Token program account
*
* @return Unpacked multisig
*/
export function unpackMultisig(address, info, programId = TOKEN_PROGRAM_ID) {
if (!info)
throw new TokenAccountNotFoundError();
if (!info.owner.equals(programId))
throw new TokenInvalidAccountOwnerError();
if (info.data.length != MULTISIG_SIZE)
throw new TokenInvalidAccountSizeError();
const multisig = MultisigLayout.decode(info.data);
return { address, ...multisig };
}
/** Get the minimum lamport balance for a multisig to be rent exempt
*
* @param connection Connection to use
* @param commitment Desired level of commitment for querying the state
*
* @return Amount of lamports required
*/
export async function getMinimumBalanceForRentExemptMultisig(connection, commitment) {
return await connection.getMinimumBalanceForRentExemption(MULTISIG_SIZE, commitment);
}
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