Copy async function createLimitOrder(makerAmount, takerAmount, expireTime) {
try {
// 1. Validate inputs
if (!makerAmount || !takerAmount || makerAmount <= 0 || takerAmount <= 0) {
throw new Error('Invalid parameters');
}
// 2. Check wallet connection
if (!isWalletConnected) {
throw new Error('Wallet not connected');
}
// 3. Get contract address
const contractAddress = getLimitContractAddress(chainName);
// 4. Check and approve token if needed
if (!isNativeToken(inToken.address)) {
const approvalAmount = makerAmount * (10 ** inToken.decimals);
await checkTokenApproval(inToken.address, contractAddress, approvalAmount, walletAccount, provider);
}
// 5. Prepare order parameters
const messageParams = {
makerAsset: inToken.address,
takerAsset: outToken.address,
makerAmount: (makerAmount * (10 ** inToken.decimals)).toString(),
takerAmount: (takerAmount * (10 ** outToken.decimals)).toString(),
expireTime: expireTime,
};
// 6. Create and sign message
const message = `makerAsset:\n${messageParams.makerAsset}\ntakerAsset:\n${messageParams.takerAsset}\nmakerAmount:\n${messageParams.makerAmount}\ntakerAmount:\n${messageParams.takerAmount}\nexpireTime:\n${messageParams.expireTime}`;
const signer = await provider.getSigner();
const signature = await signer.signMessage(message);
// 7. Submit order
const order = {
...messageParams,
signature,
orderMaker: walletAccount,
};
const response = await axios.post(
`https://open-api.openocean.finance/v2/8453/limit-order`,
order,
{ headers: { 'Content-Type': 'application/json' } }
);
return response.data;
} catch (error) {
console.error('Error creating limit order:', error);
throw error;
}
} 
