Create contractUtils.js

blockchain_integration/pi_network/utils/contractUtils.js

@@ -0,0 +1,45 @@
+// utils/contractUtils.js
+const Web3 = require('web3');
+const web3 = new Web3(Web3.givenProvider || "http://localhost:8545");
+
+/**
+ * Create a contract instance
+ * @param {string} abi - The contract ABI
+ * @param {string} address - The contract address
+ * @returns {Object} - The contract instance
+ */
+const getContractInstance = (abi, address) => {
+    return new web3.eth.Contract(abi, address);
+};
+
+/**
+ * Send a transaction to a contract method
+ * @param {Object} contract - The contract instance
+ * @param {string} methodName - The method name to call
+ * @param {Array} args - The arguments for the method
+ * @param {string} from - The address sending the transaction
+ * @param {string} value - The value to send (in Wei)
+ * @returns {Promise<Object>} - The transaction receipt
+ */
+const sendTransaction = async (contract, methodName, args, from, value = '0') => {
+    const method = contract.methods[methodName](...args);
+    const gas = await method.estimateGas({ from, value });
+    return await method.send({ from, gas, value });
+};
+
+/**
+ * Call a contract method (read-only)
+ * @param {Object} contract - The contract instance
+ * @param {string} methodName - The method name to call
+ * @param {Array} args - The arguments for the method
+ * @returns {Promise<any>} - The result of the method call
+ */
+const callMethod = async (contract, methodName, args) => {
+    return await contract.methods[methodName](...args).call();
+};
+
+module.exports = {
+    getContractInstance,
+    sendTransaction,
+    callMethod,
+};