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In this guide, we will walk through the process of placing a limit order on Kyberswap using their API. Kyberswap is a decentralized exchange (DEX) aggregator that provides the best token prices by aggregating liquidity from various DEXs. By leveraging Kyberswap's API, we can automate the process of placing limit orders for token trades, giving you full control over your trade price. This tutorial will guide you through setting up the necessary environment, writing the code to interact with the Kyberswap API, and successfully placing a limit order using Node.js and the appropriate dependencies. For more about DEX, visit crypto exchange development services.What is a limit order?A limit order is an instruction to buy or sell your token at a specific price or better. It gives control over the trade price to be executed.For example:A buy limit order will only execute at the limit price. And a sell limit order will only execute at the limit price or higher.Also Read | Ethereum Smart Contracts: Best Use CasesWhat is Kyberswap?A dex aggregator & liquidity protocol that provides the best token price by aggregating liquidity from various DEXs. It also provides liquidity providers with opportunities to earn rewards by depositing their tokens.Before everything, you must have Node.js and VS Code installed.Let's set up this:Open your terminal and type this command: 1. mkdir KyberswapApi 2. cd KyberswapApi 3. code .It will open your project KyberswapApi in VS Code, then open the terminal in VS Code and type this command: npm init It will initialize a project and create the package.json file. npm install viem ethers axios It will install all dependencies in your package.json file.Create a file index.js and paste this ProgramRun this command in your terminal : node index.js (this will create the limit order successfully).Also, Read | A Dev Guide to Placing Orders using Hyperliquid APIHow to use Kyberswap Api to place a limit orderTo create a new order, we need to make a post request on this URL: https://limit-order.kyberswap.com/write/api/v1/ordersFor this, we need params which include the signed EIP712 message and returned data from this post request(https://limit-order.kyberswap.com/write/api/v1/orders/sign-message).Program : import { createWalletClient, erc20Abi, parseEther, getContract, createPublicClient, http, encodeFunctionData } from "viem"; import { ethers } from "ethers"; import axios from "axios"; import { privateKeyToAccount } from 'viem/accounts'; import { base } from 'viem/chains'; const kyberApiUrl = "https://limit-order.kyberswap.com"; const privateKey = "000000X4PRivateKey"; const rpcUrl = "https://mainnet.base.org"; async function mainApprove(makerAsset, limitOrderContract, maker, makingAmount) { const client = createPublicClient({ chain: { id: 8453, // Base chain ID name: "Base", rpcUrls: { default: { http: ["https://mainnet.base.org"] }, }, }, transport: http("https://mainnet.base.org") }); console.log("Client created for Base chain:", client); const tokenContract = getContract({ abi: erc20Abi, address: makerAsset, client: client, }); console.log("here is the tokenContract",tokenContract.address); const currentAllowance = await tokenContract.read.allowance([ maker, limitOrderContract, ]); console.log("Current Allowance:", currentAllowance.toString()); const encodedCalls = []; if (BigInt(currentAllowance) < BigInt('100000000')) { console.log("here it comes "); const approvalData =await getTokenApprovalCalldata( makerAsset, limitOrderContract, makingAmount, ); console.log(' Approval Data:', approvalData); encodedCalls.push({ to: makerAsset , data: approvalData, // gas: '0.007547422' //approvalGas.toString(), }); console.log("Encoded Calls:", encodedCalls); const swaptx = encodedCalls; const str = "000000X4PRivateKey"; const account = privateKeyToAccount(`0x${str}`); const walletClient = createWalletClient({ account, chain: base, transport: http('https://mainnet.base.org'), }); console.log("Wallet Client created:"); const tx1=[]; for (const call of swaptx) { const tx = { to: call.to, data: call.data, value: call.value ? BigInt(call.value) : 0n, }; const hash = await walletClient.sendTransaction(tx); tx1.push(hash); console.log(' Transaction sent, hash:', hash); } return tx1; } return ""; } async function postCreateOrderUnsigned( chainId, makerAsset, takerAsset, maker, //Maker address makingAmount, // "10000" takingAmount // "20000000000000000" ) { let targetPath = `/write/api/v1/orders/sign-message`; // Structure the request to be sent in POST body const requestBody = { chainId: chainId.toString(), makerAsset: makerAsset, // USDC takerAsset: takerAsset, // KNC maker: maker, allowedSenders: [maker], // Included so that only our account can fill this order makingAmount: makingAmount, takingAmount: takingAmount, expiredAt: Math.floor(Date.now() / 1000) + 60 * 60, // 60mins }; console.debug(requestBody); try { const { data } = await axios.post(kyberApiUrl + targetPath, requestBody); // Return the request used and the EIP712 unsigned data console.log("the data we have",data); return { routerContract: data.data.domain.verifyingContract, requestBody: requestBody, returnedData: data.data, }; } catch (error) { throw error; } } //Get Maker Active Making Amount async function getMakerActiveAmount(chainId, makerAsset, makerAddress) { const targetPath = `/read-ks/api/v1/orders/active-making-amount`; const targetPathConfig = { params: { chainId: chainId, makerAsset: makerAsset, maker: makerAddress, }, }; try { const { data } = await axios.get( kyberApiUrl + targetPath, targetPathConfig ); return data.data.activeMakingAmount; } catch (error) { throw error; } } async function getContracts(chainId) { const targetPath = `/read-ks/api/v1/configs/contract-address`; // Specify the chainId to query const targetPathConfig = { params: { chainId: chainId.toString(), }, }; try { console.log(`\nGetting the LO contracts...`); const { data } = await axios.get( kyberApiUrl + targetPath, targetPathConfig ); return data.data; } catch (error) { throw error; } } // Request approval with calldata sending to the user server (client-side) async function getTokenApprovalCalldata( tokenContractAddress, spenderAddress, amount ) { const data = encodeFunctionData({ abi: erc20Abi, functionName: "approve", args: [spenderAddress, parseEther(amount.toString())], }); //TODO: Send the calldata to the user server here return data; } async function signOrderData(domain, types, message) { const provider = new ethers.JsonRpcProvider(rpcUrl); const signer = new ethers.Wallet(privateKey, provider); return await signer.signTypedData(domain, types, message); } // Create New Order on Kyberswap async function postCreateOrder( chainId, makerAsset, takerAsset, maker, makingAmount, takingAmount ) { const targetPath = `/write/api/v1/orders`; const unsignedOrder = await postCreateOrderUnsigned( chainId, makerAsset, takerAsset, maker, makingAmount, takingAmount ); // Get the request body and the EIP712 order creation data const unsignedOrderReqBody = unsignedOrder.requestBody; const unsignedOrderReturnData = unsignedOrder.returnedData; const routerContract = unsignedOrder.routerContract; // Get the Maker current making amount to ensure contract has sufficient allowance across all orders const currentMakingAmount = await getMakerActiveAmount( chainId, makerAsset, maker ); const newMakingAmount = Number(currentMakingAmount) + Number(unsignedOrderReqBody.makingAmount); // Get the LO contract address to interact with on-chain const limitOrderContract = (await getContracts(chainId)).latest; // Check if LO contract has sufficient allowance to spend makerAsset await getTokenApprovalCalldata( makerAsset, limitOrderContract, newMakingAmount ); const swaptx= await mainApprove( makerAsset, limitOrderContract, maker, newMakingAmount ) console.log("the swaptx is: ",swaptx); // Sign the EIP712 order creation with the user server (client-side) const signature = await signOrderData( unsignedOrderReturnData.domain, { Order: unsignedOrderReturnData.types.Order }, unsignedOrderReturnData.message ); // Structure the request to be sent in POST body const requestBody = { ...unsignedOrderReqBody, salt: unsignedOrderReturnData.message.salt, signature: signature, }; console.log("the request body is: ", requestBody); try { console.log(`\nPosting the create order...`); const { data } = await axios.post(kyberApiUrl + targetPath, requestBody); console.log(`KyberSwap server response:`); console.log(data); } catch (error) { throw error; } }Call the post createOrder function with its parameters, and your order will be created.For example : postCreateOrder( "8453", // chainId "0x50c5725949A6F0c72E6C4a641F24049A917DB0Cb", // maker asset "0x833589fcd6edb6e08f4c7c32d4f71b54bda02913", // taker asset "0x1AC9b76006BaF4f06563E491d4182C82792D2A2C", // maker address "5000000", // making amount "5000000" // taking amount );You may also like | Building a Portfolio Tracker Dashboard Using Hyperliquid APIConclusion:In conclusion, this guide demonstrates how to place a limit order on Kyberswap using the API, allowing you to efficiently manage trades with full control over your order price. By following the steps to set up your environment, configure your wallet, and interact with the Kyberswap API, you can easily integrate limit orders into your trading strategies. With the right parameters and authentication, you can securely create orders on Kyberswap and take advantage of the liquidity available. This process enables developers to enhance their algorithmic trading systems and automate transactions effectively on the platform. For more information, refer to the Kyberswap API documentation.In case you are planning to build a DEX aggregator like Kyberswap, connect with our skilled blockchain developers to get started.

With the Movement Mainnet as their main product, Movement Labs is building a network of blockchains based on Move. With the Move programming language, this blockchain offers high transaction throughput (TPS) while prioritizing community interaction. It provides freedom for modular adaptations, quick finality, and native access to liquidity right now. Utilizing Facebook's Move language, the platform's design places a strong emphasis on safety and ownership. Because Move represents assets as resources, it is easier and safer to implement smart contracts for typical blockchain operations like asset destruction, minting, and transfer. The white paper delves deeper into the technological solutions, while the documentation presents the Movement Mainnet's goal. To know more about developing on other blockchains, visit blockchain app development services.Features of the Movement Blockchain:160K+TPS with MoveVM's parallel execution. Fast finality ensures quick transaction confirmation for real-time apps like games and DePIN.Minimal transaction costs, ideal for micro transactions and high-frequency use cases like gaming and IoT.Move language prevents vulnerabilities and ensures asset safety. Formal verification with Move Prover enhances contract security.Custom rollups for specific use cases. Modular architecture allows easy integration of new features.Shared sequencers enable cross-chain transactions and pooled liquidity. Dual compatibility supports both MoveVM and EVM bytecode for Move and Solidity contracts.Roll-ups and modular chains prevent congestion, supporting large-scale apps like MMOs or DePIN.Validators stake assets for security, with multi-asset staking promoting decentralization and resilience.You may also like | Developing a Peer-to-Peer Car Rental System on Blockchain (with Code)Workflow of the Movement Network :1. Key Elements :The Fast Finality Settlement Module (fast transaction finality), the Decentralized Shared Sequencer (ensures fair transaction ordering and cross-chain interoperability), and the Move Executor (supports Move VM & EVM byte code) are all elements of Movement Network.2. Life cycle of a TransactionThe Move Executor executes transactions, sequences them, verifies data availability, and uses the Fast Finality Settlement Module to finalize them on Layer 1.3. Staking with multiple assets and interoperabilityMulti-asset staking improves network security and decentralization, while the common decentralized sequencer facilitates cross-chain transactions.4. Move the Arena and the StackIn order to provide quick finality and shared liquidity, the Move Arena enables the deployment of application-specific chains, while the Move Stack offers tools for creating Move-based blockchains.Also, Check | Developing a Blockchain-Based Encrypted Messaging AppReal-World Projects Powered by Movement Blockchain :Seekers AllianceA dynamic multiplayer trading card game that integrates NFT mechanics and a competitive ranked ladder, offering a fresh take on digital card battles.Cryptara ConquestDive into this 2D survival RPG where players can craft items, battle hostile mobs, and make in-game purchases—all on-chain.XenobunnyA PvP strategy card game that merges NFTs, DeFi elements, and user-generated content to create a unique and interactive gaming experience.LaniakeaAn expansive open-world MMORPG featuring customizable characters, 20 unique factions, and over 100 weapons—built for deep, blockchain-enhanced immersion.Also, read | Quantum-Resistant Blockchain App Development Using MochimoSwap Implementation Script:file : InitializeClient.tsimport { Aptos, AptosConfig, Network } from "@aptos-labs/ts-sdk"; const network = process.env.NETWORK?.toUpperCase() as keyof typeof Network; const config = new AptosConfig({ network: Network[network] || Network.CUSTOM, fullnode: 'https://testnet.bardock.movementnetwork.xyz/v1', indexer: 'https://indexer.testnet.movementnetwork.xyz', }); export const aptosClient = new Aptos(config);This code sets up a connection to the Movement blockchain, which is compatible with Aptos. It uses a testnet fullnode and indexer to enable your app to send transactions, query data, and interact with the blockchain network. This setup is essential for integrating blockchain features into your application.file Migrate.ts fileimport { Account, Ed25519PrivateKey } from "@aptos-labs/ts-sdk"; import { aptosClient } from "./IntializeClient"; const INPUT_FUNCTION = `0x1::coin::migrate_to_fungible_store` as const; (async () => { //Private Key const privateKey = new Ed25519PrivateKey('YOUR PRIVATE KEY'); const account = Account.fromPrivateKey({ privateKey }); //payload to Build Transaction const wrapAptPayload = { function: INPUT_FUNCTION, typeArguments: ['0x1::aptos_coin::AptosCoin'], functionArguments: [], arguments: [], }; //build Transaction const txn = await aptosClient.transaction.build.simple({ sender: account.accountAddress, data: wrapAptPayload, }); //Sign Transaction Using Private Key const signature = await aptosClient.sign({ signer: account, transaction: txn, }); console.log("Signature:..............", signature); //Submit Transaction const commitTxn = await aptosClient.transaction.submit.simple({ transaction: txn, senderAuthenticator: signature, }); console.log("Transaction Submitted:............", commitTxn); // Waiting for Transaction Response const response = await aptosClient.waitForTransaction({ transactionHash: commitTxn.hash, }); console.log("Waiting Response :............", response); })();This script demonstrates how to perform a token migration on the Movement (Aptos-compatible) blockchain. It connects using a private key, builds a transaction for the migrate_to_fungible_store function, signs it, submits it to the network, and waits for the result. This flow is essential for interacting with smart contract functions securely.file Swap.ts :import { aptosClient } from "./IntializeClient"; import { Account, Ed25519PrivateKey, InputGenerateTransactionPayloadData, } from "@aptos-labs/ts-sdk"; const MODULE_ADDRESS = "0xa5c3d8ac06d3e30a2ad5d06ebe2b3f2ace9597b167cf18d61c5263707aa4764b::router::swap_exact_input" as const; (async () => { const privateKey = new Ed25519PrivateKey( "YOUR PRIVATE KEY" ); const account = Account.fromPrivateKey({ privateKey }); try { const payload: InputGenerateTransactionPayloadData = { function: MODULE_ADDRESS, functionArguments: [ "0xa", "YOUR TOKEN ADDRESSS", 'YOUR SWAP AMOUNT', 'YOUR SWAP AMOUNT', ], typeArguments: [], }; const TxnIn = await aptosClient.transaction.build.simple({ sender: account.accountAddress, data: payload, }); console.log("Transaction Built:", TxnIn); const signature = aptosClient.transaction.sign({ signer: account, transaction: TxnIn, }); console.log("Signature Created:", signature); const newTxn = await aptosClient.transaction.submit.simple({ transaction: TxnIn, senderAuthenticator: signature, }); console.log("Transaction Submitted:", newTxn); const response = await aptosClient.waitForTransaction({ transactionHash: newTxn.hash, }); console.log("Transaction Confirmed:", response); } catch (error: any) { console.error("Error in swap transaction:", error.message || error); } })();This script performs a token swap transaction on the Movement blockchain by interacting with a specific smart contract function. It creates a transaction payload with necessary arguments, signs it using a private key, submits the transaction, and waits for confirmation from the network. This process enables executing token swaps securely on the blockchain.Movement Blockchain Explorer: https://explorer.movementnetwork.xyz/?network=bardock+testnet Conclusion:The Move Blockchain is a sophisticated Layer 2 network built on Ethereum that uses the Move Virtual Machine (MoveVM) to provide strong security, cheap fees, and fast throughput. It allows for compatible and scalable dApps by supporting both Move and EVM smart contracts. With its resource-oriented programming style, formal verification, and configurable roll-ups, Movement raises the bar for blockchain security and effectiveness while facilitating wider access to next-generation blockchain development. If you are looking to leverage the potential of the Movement blockchain to develop and launch your project, connect with our skilled blockchain developers to get started. MoveVM adoption is growing across ecosystems like Movement and Sui. Working with a Sui Blockchain Development Company helps you align with emerging standards.