/
thawAccount.ts
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/
thawAccount.ts
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import { struct, u8 } from '@solana/buffer-layout';
import { AccountMeta, PublicKey, Signer, TransactionInstruction } from '@solana/web3.js';
import { TOKEN_PROGRAM_ID } from '../constants';
import {
TokenInvalidInstructionDataError,
TokenInvalidInstructionKeysError,
TokenInvalidInstructionProgramError,
TokenInvalidInstructionTypeError,
} from '../errors';
import { addSigners } from './internal';
import { TokenInstruction } from './types';
/** TODO: docs */
export interface ThawAccountInstructionData {
instruction: TokenInstruction.ThawAccount;
}
/** TODO: docs */
export const thawAccountInstructionData = struct<ThawAccountInstructionData>([u8('instruction')]);
/**
* Construct a ThawAccount instruction
*
* @param account Account to thaw
* @param mint Mint account
* @param authority Mint freeze authority
* @param multiSigners Signing accounts if `authority` is a multisig
* @param programId SPL Token program account
*
* @return Instruction to add to a transaction
*/
export function createThawAccountInstruction(
account: PublicKey,
mint: PublicKey,
authority: PublicKey,
multiSigners: Signer[] = [],
programId = TOKEN_PROGRAM_ID
): TransactionInstruction {
const keys = addSigners(
[
{ pubkey: account, isSigner: false, isWritable: true },
{ pubkey: mint, isSigner: false, isWritable: false },
],
authority,
multiSigners
);
const data = Buffer.alloc(thawAccountInstructionData.span);
thawAccountInstructionData.encode({ instruction: TokenInstruction.ThawAccount }, data);
return new TransactionInstruction({ keys, programId, data });
}
/** A decoded, valid ThawAccount instruction */
export interface DecodedThawAccountInstruction {
programId: PublicKey;
keys: {
account: AccountMeta;
mint: AccountMeta;
authority: AccountMeta;
multiSigners: AccountMeta[];
};
data: {
instruction: TokenInstruction.ThawAccount;
};
}
/**
* Decode a ThawAccount instruction and validate it
*
* @param instruction Transaction instruction to decode
* @param programId SPL Token program account
*
* @return Decoded, valid instruction
*/
export function decodeThawAccountInstruction(
instruction: TransactionInstruction,
programId = TOKEN_PROGRAM_ID
): DecodedThawAccountInstruction {
if (!instruction.programId.equals(programId)) throw new TokenInvalidInstructionProgramError();
if (instruction.data.length !== thawAccountInstructionData.span) throw new TokenInvalidInstructionDataError();
const {
keys: { account, mint, authority, multiSigners },
data,
} = decodeThawAccountInstructionUnchecked(instruction);
if (data.instruction !== TokenInstruction.ThawAccount) throw new TokenInvalidInstructionTypeError();
if (!account || !mint || !authority) throw new TokenInvalidInstructionKeysError();
// TODO: key checks?
return {
programId,
keys: {
account,
mint,
authority,
multiSigners,
},
data,
};
}
/** A decoded, non-validated ThawAccount instruction */
export interface DecodedThawAccountInstructionUnchecked {
programId: PublicKey;
keys: {
account: AccountMeta | undefined;
mint: AccountMeta | undefined;
authority: AccountMeta | undefined;
multiSigners: AccountMeta[];
};
data: {
instruction: number;
};
}
/**
* Decode a ThawAccount instruction without validating it
*
* @param instruction Transaction instruction to decode
*
* @return Decoded, non-validated instruction
*/
export function decodeThawAccountInstructionUnchecked({
programId,
keys: [account, mint, authority, ...multiSigners],
data,
}: TransactionInstruction): DecodedThawAccountInstructionUnchecked {
return {
programId,
keys: {
account,
mint,
authority,
multiSigners,
},
data: thawAccountInstructionData.decode(data),
};
}