Exploring Swan Chain: An Overview of Its Blockchain Features
Setting up the Go Development Environment for Swan Chain
Connecting to a Swan Chain RPC Using Go
Fetching Basic Blockchain Data from Swan Chain
Setup your RPC URL
package main
// Shared RPC URL
const rpcURL = "https://rpc-testnet.swanchain.io" // Replace with your testnet's RPC URL
func TestConnectToTestnet(t *testing.T) {
ctx, cancel := context.WithTimeout(context.Background(), 3*time.Second)
defer cancel()
// Assuming rpcURL is defined as a constant or variable that contains your Ethereum testnet RPC URL
client, err := ethclient.DialContext(ctx, rpcURL)
if err != nil {
t.Fatalf("Failed to connect to the testnet: %v", err)
}
defer client.Close()
// Fetching the network ID
networkID, err := client.NetworkID(ctx)
if err != nil {
t.Fatalf("Failed to get network ID: %v", err)
}
// Fetching the latest block number
blockNumber, err := client.BlockNumber(ctx)
if err != nil {
t.Fatalf("Failed to get the latest block number: %v", err)
}
t.Logf("Network ID: %v", networkID)
t.Logf("Latest block number: %d", blockNumber)
}
Output
=== RUN TestGetAccountBalance ethclient_test.go:64: Balance of account [0xA41c36BCd65bDbFB62FE93E3b7a28d290E63C1F7]: 0.045930 Ether
--- PASS: TestGetAccountBalance (0.21s)
Managing Wallets and Checking Balances
Creating and Managing Swan Chain Wallets with Go
Understanding and Checking Wallet Balances on Swan Chain
Handling Swan Chain's Native Cryptocurrency Units
// TestGetAccountBalance tests fetching the balance for a specific account
func TestGetAccountBalance(t *testing.T) {
accountAddress := "0xA41c36BCd65bDbFB62FE93E3b7a28d290E63C1F7" // Replace with the account address
ctx, cancel := context.WithTimeout(context.Background(), 3*time.Second)
defer cancel()
client, err := ethclient.DialContext(ctx, rpcURL)
if err != nil {
t.Fatalf("Failed to connect to the testnet: %v", err)
}
defer client.Close()
address := common.HexToAddress(accountAddress)
balanceWei, err := client.BalanceAt(ctx, address, nil) // Balance in Wei
if err != nil {
t.Fatalf("Failed to get the account balance: %v", err)
}
// Convert balance from Wei (big.Int) to Ether (float64)
balanceEther := new(big.Float).Quo(new(big.Float).SetInt(balanceWei), big.NewFloat(math.Pow10(18)))
t.Logf("Balance of account [%s]: %f Ether", accountAddress, balanceEther)
}
Deploying a Smart Contract
Install and fund your MetaMask wallet
Write, compile, and deploy your first smart contract
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
contract MessageContract {
string private message;
function writeMessage(string calldata newMessage) public {
message = newMessage;
}
function readMessage() public view returns (string memory) {
return message;
}
}
Click "Advanced Configurations" , and choose "London"
