@okx-dex/okx-dex-sdk
Version:
OKX DEX SDK
106 lines (105 loc) • 4.16 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.toBaseUnits = toBaseUnits;
// src/examples/evm/evm-approve.ts
const index_1 = require("../../index");
require("dotenv/config");
const ethers_1 = require("ethers");
const evm_wallet_1 = require("../../core/evm-wallet");
const provider = new ethers_1.ethers.JsonRpcProvider(process.env.EVM_RPC_URL);
const wallet = (0, evm_wallet_1.createEVMWallet)(process.env.EVM_PRIVATE_KEY, provider);
const chainId = '8453';
// Validate environment variables
const requiredEnvVars = [
'OKX_API_KEY',
'OKX_SECRET_KEY',
'OKX_API_PASSPHRASE',
'OKX_PROJECT_ID',
'EVM_WALLET_ADDRESS',
'EVM_PRIVATE_KEY',
'EVM_RPC_URL'
];
for (const envVar of requiredEnvVars) {
if (!process.env[envVar]) {
throw new Error(`Missing required environment variable: ${envVar}`);
}
}
function toBaseUnits(amount, decimals) {
// Remove any decimal point and count the decimal places
const [integerPart, decimalPart = ''] = amount.split('.');
const currentDecimals = decimalPart.length;
// Combine integer and decimal parts, removing the decimal point
let result = integerPart + decimalPart;
// Add zeros if we need more decimal places
if (currentDecimals < decimals) {
result = result + '0'.repeat(decimals - currentDecimals);
}
// Remove digits if we have too many decimal places
else if (currentDecimals > decimals) {
result = result.slice(0, result.length - (currentDecimals - decimals));
}
// Remove leading zeros
result = result.replace(/^0+/, '') || '0';
return result;
}
async function main() {
try {
const args = process.argv.slice(2);
if (args.length !== 2) {
console.log("Usage: ts-node evm-approve.ts <tokenAddress> <amountToApprove>");
console.log("\nExamples:");
console.log(" # Approve 1000 USDC");
console.log(` ts-node evm-approve.ts 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 1000`);
process.exit(1);
}
const [tokenAddress, amount] = args;
// Initialize client
const client = new index_1.OKXDexClient({
apiKey: process.env.OKX_API_KEY,
secretKey: process.env.OKX_SECRET_KEY,
apiPassphrase: process.env.OKX_API_PASSPHRASE,
projectId: process.env.OKX_PROJECT_ID,
evm: {
wallet: wallet
}
});
// Get token information using quote
console.log("Getting token information...");
const tokenInfo = await client.dex.getQuote({
chainId: chainId,
fromTokenAddress: tokenAddress,
toTokenAddress: '0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE', // Native token
amount: '1000000', // Use a reasonable amount for quote
slippage: '0.5'
});
const tokenDecimals = parseInt(tokenInfo.data[0].fromToken.decimal);
const rawAmount = toBaseUnits(amount, tokenDecimals);
console.log("\nApproval Details:");
console.log("--------------------");
console.log(`Token: ${tokenInfo.data[0].fromToken.tokenSymbol}`);
console.log(`Amount: ${amount} ${tokenInfo.data[0].fromToken.tokenSymbol}`);
console.log(`Amount in base units: ${rawAmount}`);
// Execute the approval
console.log("\nExecuting approval...");
const result = await client.dex.executeApproval({
chainId: chainId,
tokenContractAddress: tokenAddress,
approveAmount: rawAmount
});
if ('alreadyApproved' in result) {
console.log("\nToken already approved for the requested amount!");
}
else {
console.log("\nApproval completed successfully!");
console.log("Transaction Hash:", result.transactionHash);
console.log("Explorer URL:", result.explorerUrl);
}
}
catch (error) {
console.error("\nError:", error instanceof Error ? error.message : "Unknown error");
process.exit(1);
}
}
if (require.main === module) {
main();
}