// Take order on Ethereum as an example const { ethers } = require("ethers"); // 1. Get signer const provider = new ethers.providers.JsonRpcProvider("https://mainnet.infura.io/v3/"); const signer = new ethers.Wallet(YOUR_PRIVATE_KEY, provider); // 2. Get storage contract instance const StorageOrderABI = [ "function getPrice(uint size, bool isPermanent) public view returns (uint)", "function placeOrder(string memory cid, uint size, bool isPermanent) external payable", "function placeOrderWithNode(string memory cid, uint size, address nodeAddress, bool isPermanent) public payable" ] const storageOrder = new ethers.Contract("0xE391613d2056e47F74ED5eF1d443d4CDB21AAAd9", StorageOrderABI, signer); // 3. Get price by size and isPermanent const fileCid = "QmfH5zLmBtptUxRSGWazaumGwSsCW3n6P164eRXpbFatmJ"; const fileSize = 5246268; const isPermanent = false; const price = await storageOrder.getPrice(fileSize, isPermanent); // 4. Place storage order await storageOrder.placeOrder(fileCid, fileSize, isPermanent, {value: price});