@drift-labs/sdk
Version:
SDK for Drift Protocol
81 lines (80 loc) • 3.74 kB
JavaScript
;
var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
if (k2 === undefined) k2 = k;
var desc = Object.getOwnPropertyDescriptor(m, k);
if (!desc || ("get" in desc ? !m.__esModule : desc.writable || desc.configurable)) {
desc = { enumerable: true, get: function() { return m[k]; } };
}
Object.defineProperty(o, k2, desc);
}) : (function(o, m, k, k2) {
if (k2 === undefined) k2 = k;
o[k2] = m[k];
}));
var __setModuleDefault = (this && this.__setModuleDefault) || (Object.create ? (function(o, v) {
Object.defineProperty(o, "default", { enumerable: true, value: v });
}) : function(o, v) {
o["default"] = v;
});
var __importStar = (this && this.__importStar) || function (mod) {
if (mod && mod.__esModule) return mod;
var result = {};
if (mod != null) for (var k in mod) if (k !== "default" && Object.prototype.hasOwnProperty.call(mod, k)) __createBinding(result, mod, k);
__setModuleDefault(result, mod);
return result;
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.createMinimalEd25519VerifyIx = void 0;
const web3_js_1 = require("@solana/web3.js");
const BufferLayout = __importStar(require("@solana/buffer-layout"));
const ED25519_INSTRUCTION_LEN = 16;
const SIGNATURE_LEN = 64;
const PUBKEY_LEN = 32;
const MAGIC_LEN = 4;
const MESSAGE_SIZE_LEN = 2;
const readUint16LE = (data, offset) => {
return data[offset] | (data[offset + 1] << 8);
};
const ED25519_INSTRUCTION_LAYOUT = BufferLayout.struct([
BufferLayout.u8('numSignatures'),
BufferLayout.u8('padding'),
BufferLayout.u16('signatureOffset'),
BufferLayout.u16('signatureInstructionIndex'),
BufferLayout.u16('publicKeyOffset'),
BufferLayout.u16('publicKeyInstructionIndex'),
BufferLayout.u16('messageDataOffset'),
BufferLayout.u16('messageDataSize'),
BufferLayout.u16('messageInstructionIndex'),
]);
/**
* Constructs a minimal Ed25519 verification instruction that references the data
* inside the drift custom instruction (e.g. postPythLazerOracleUpdate, placeSignedMsgTakerOrder).
*
* @param customInstructionIndex The index of the custom instruction in the transaction (e.g. if tx contains compute budget limit, compute budget price, ed25519 verify, custom ix, this would be 3).
* @param messageOffset The offset within the custom instruction data where the signed message begins.
* @param customInstructionData The entire instruction data array for the custom instruction.
*/
function createMinimalEd25519VerifyIx(customInstructionIndex, messageOffset, customInstructionData, magicLen) {
const signatureOffset = messageOffset + (magicLen === undefined ? MAGIC_LEN : magicLen);
const publicKeyOffset = signatureOffset + SIGNATURE_LEN;
const messageDataSizeOffset = publicKeyOffset + PUBKEY_LEN;
const messageDataOffset = messageDataSizeOffset + MESSAGE_SIZE_LEN;
const messageDataSize = readUint16LE(customInstructionData, messageDataSizeOffset - messageOffset);
const instructionData = Buffer.alloc(ED25519_INSTRUCTION_LEN);
ED25519_INSTRUCTION_LAYOUT.encode({
numSignatures: 1,
padding: 0,
signatureOffset,
signatureInstructionIndex: customInstructionIndex,
publicKeyOffset,
publicKeyInstructionIndex: customInstructionIndex,
messageDataOffset,
messageDataSize: messageDataSize,
messageInstructionIndex: customInstructionIndex,
}, instructionData);
return new web3_js_1.TransactionInstruction({
keys: [],
programId: web3_js_1.Ed25519Program.programId,
data: instructionData,
});
}
exports.createMinimalEd25519VerifyIx = createMinimalEd25519VerifyIx;