@solana/spl-token
Version:
SPL Token Program JS API
78 lines • 3.11 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.amountToUiAmountInstructionData = void 0;
exports.createAmountToUiAmountInstruction = createAmountToUiAmountInstruction;
exports.decodeAmountToUiAmountInstruction = decodeAmountToUiAmountInstruction;
exports.decodeAmountToUiAmountInstructionUnchecked = decodeAmountToUiAmountInstructionUnchecked;
const buffer_layout_1 = require("@solana/buffer-layout");
const buffer_layout_utils_1 = require("@solana/buffer-layout-utils");
const web3_js_1 = require("@solana/web3.js");
const constants_js_1 = require("../constants.js");
const errors_js_1 = require("../errors.js");
const types_js_1 = require("./types.js");
/** TODO: docs */
exports.amountToUiAmountInstructionData = (0, buffer_layout_1.struct)([
(0, buffer_layout_1.u8)('instruction'),
(0, buffer_layout_utils_1.u64)('amount'),
]);
/**
* Construct a AmountToUiAmount instruction
*
* @param mint Public key of the mint
* @param amount Amount of tokens to be converted to UiAmount
* @param programId SPL Token program account
*
* @return Instruction to add to a transaction
*/
function createAmountToUiAmountInstruction(mint, amount, programId = constants_js_1.TOKEN_PROGRAM_ID) {
const keys = [{ pubkey: mint, isSigner: false, isWritable: false }];
const data = Buffer.alloc(exports.amountToUiAmountInstructionData.span);
exports.amountToUiAmountInstructionData.encode({
instruction: types_js_1.TokenInstruction.AmountToUiAmount,
amount: BigInt(amount),
}, data);
return new web3_js_1.TransactionInstruction({ keys, programId, data });
}
/**
* Decode a AmountToUiAmount instruction and validate it
*
* @param instruction Transaction instruction to decode
* @param programId SPL Token program account
*
* @return Decoded, valid instruction
*/
function decodeAmountToUiAmountInstruction(instruction, programId = constants_js_1.TOKEN_PROGRAM_ID) {
if (!instruction.programId.equals(programId))
throw new errors_js_1.TokenInvalidInstructionProgramError();
if (instruction.data.length !== exports.amountToUiAmountInstructionData.span)
throw new errors_js_1.TokenInvalidInstructionDataError();
const { keys: { mint }, data, } = decodeAmountToUiAmountInstructionUnchecked(instruction);
if (data.instruction !== types_js_1.TokenInstruction.AmountToUiAmount)
throw new errors_js_1.TokenInvalidInstructionTypeError();
if (!mint)
throw new errors_js_1.TokenInvalidInstructionKeysError();
return {
programId,
keys: {
mint,
},
data,
};
}
/**
* Decode a AmountToUiAmount instruction without validating it
*
* @param instruction Transaction instruction to decode
*
* @return Decoded, non-validated instruction
*/
function decodeAmountToUiAmountInstructionUnchecked({ programId, keys: [mint], data, }) {
return {
programId,
keys: {
mint,
},
data: exports.amountToUiAmountInstructionData.decode(data),
};
}
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