@solana/spl-token
Version:
SPL Token Program JS API
83 lines • 3.21 kB
JavaScript
import { struct, u8 } from '@solana/buffer-layout';
import { TransactionInstruction } from '@solana/web3.js';
import { programSupportsExtensions } from '../constants.js';
import { TokenInvalidInstructionDataError, TokenInvalidInstructionKeysError, TokenInvalidInstructionProgramError, TokenInvalidInstructionTypeError, TokenUnsupportedInstructionError, } from '../errors.js';
import { TokenInstruction } from './types.js';
import { COptionPublicKeyLayout } from '../serialization.js';
/** TODO: docs */
export const initializeMintCloseAuthorityInstructionData = struct([
u8('instruction'),
new COptionPublicKeyLayout('closeAuthority'),
]);
/**
* Construct an InitializeMintCloseAuthority instruction
*
* @param mint Token mint account
* @param closeAuthority Optional authority that can close the mint
* @param programId SPL Token program account
*
* @return Instruction to add to a transaction
*/
export function createInitializeMintCloseAuthorityInstruction(mint, closeAuthority, programId) {
if (!programSupportsExtensions(programId)) {
throw new TokenUnsupportedInstructionError();
}
const keys = [{ pubkey: mint, isSigner: false, isWritable: true }];
const data = Buffer.alloc(34); // worst-case size
initializeMintCloseAuthorityInstructionData.encode({
instruction: TokenInstruction.InitializeMintCloseAuthority,
closeAuthority,
}, data);
return new TransactionInstruction({
keys,
programId,
data: data.subarray(0, initializeMintCloseAuthorityInstructionData.getSpan(data)),
});
}
/**
* Decode an InitializeMintCloseAuthority instruction and validate it
*
* @param instruction Transaction instruction to decode
* @param programId SPL Token program account
*
* @return Decoded, valid instruction
*/
export function decodeInitializeMintCloseAuthorityInstruction(instruction, programId) {
if (!instruction.programId.equals(programId))
throw new TokenInvalidInstructionProgramError();
if (instruction.data.length !== initializeMintCloseAuthorityInstructionData.getSpan(instruction.data))
throw new TokenInvalidInstructionDataError();
const { keys: { mint }, data, } = decodeInitializeMintCloseAuthorityInstructionUnchecked(instruction);
if (data.instruction !== TokenInstruction.InitializeMintCloseAuthority)
throw new TokenInvalidInstructionTypeError();
if (!mint)
throw new TokenInvalidInstructionKeysError();
return {
programId,
keys: {
mint,
},
data,
};
}
/**
* Decode an InitializeMintCloseAuthority instruction without validating it
*
* @param instruction Transaction instruction to decode
*
* @return Decoded, non-validated instruction
*/
export function decodeInitializeMintCloseAuthorityInstructionUnchecked({ programId, keys: [mint], data, }) {
const { instruction, closeAuthority } = initializeMintCloseAuthorityInstructionData.decode(data);
return {
programId,
keys: {
mint,
},
data: {
instruction,
closeAuthority,
},
};
}
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