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Documentation Index

Fetch the complete documentation index at: https://docs.stablenet.network/llms.txt

Use this file to discover all available pages before exploring further.

Deploy a Solidity contract to StableNet Testnet using Hardhat and verify it on the Explorer.

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What you’ll learn

By the end of this tutorial, you’ll be able to:
  • Configure Hardhat and hardhat.config.js for StableNet Testnet
  • Deploy a WKRC payment contract using a Hardhat deploy script
  • Verify the deployment on the StableNet Explorer

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Prerequisites

  • Node.js ≥ 18 — run node --version to check
  • Testnet WKRC from the Faucet

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Create a Hardhat project

mkdir stablenet-hardhat && cd stablenet-hardhat
npm init -y
npm install --save-dev hardhat @nomicfoundation/hardhat-toolbox dotenv
npx hardhat init
When prompted, select “Create a JavaScript project”.
Store your private key in a .env file and add it to .gitignore. Never commit it to version control.
echo "PRIVATE_KEY=0xYourPrivateKey" > .env
echo ".env" >> .gitignore

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Configure hardhat.config.js

Replace the contents of hardhat.config.js: 
require("@nomicfoundation/hardhat-toolbox");
require("dotenv").config();

module.exports = {
  solidity: {
    version: "0.8.20",
    settings: {
      // StableNet does not support blob opcodes — do not use cancun
      evmVersion: "shanghai",
    },
  },
  networks: {
    stablenet_testnet: {
      url: "https://api.test.stablenet.network",
      chainId: 8283,
      accounts: [process.env.PRIVATE_KEY],
    },
  },
};
Do not set evmVersion to cancun. StableNet does not support blob opcodes (BLOBHASH, BLOBBASEFEE). Use paris or shanghai.

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Write WKRCPayment.sol

Delete the placeholder and create contracts/WKRCPayment.sol: 
rm contracts/Lock.sol

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.20;

interface IERC20 {
    function transferFrom(address from, address to, uint256 amount) external returns (bool);
    function allowance(address owner, address spender) external view returns (uint256);
}

/// @title WKRCPayment
/// @notice Accepts WKRC payments from an approved sender.
contract WKRCPayment {
    /// @dev NativeCoinAdapter (WKRC) — fixed system contract address on StableNet.
    IERC20 public constant WKRC =
        IERC20(0x0000000000000000000000000000000000001000);

    event Payment(address indexed from, address indexed to, uint256 amount);

    /// @notice Pull `amount` of WKRC from msg.sender and forward it to `to`.
    ///         Requires prior WKRC.approve(address(this), amount).
    function pay(address to, uint256 amount) external {
        require(WKRC.transferFrom(msg.sender, to, amount), "WKRC transfer failed");
        emit Payment(msg.sender, to, amount);
    }

    function allowanceOf(address owner) external view returns (uint256) {
        return WKRC.allowance(owner, address(this));
    }
}

npx hardhat compile

Compiled 1 Solidity file successfully (evm target: shanghai).

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Write the deploy script

Create scripts/deploy.js: 
const { ethers } = require("hardhat");

async function main() {
  const [deployer] = await ethers.getSigners();
  console.log("Deploying with:", deployer.address);

  const WKRCPayment = await ethers.getContractFactory("WKRCPayment");

  // StableNet requires maxPriorityFeePerGas on every transaction
  const contract = await WKRCPayment.deploy({
    maxPriorityFeePerGas: ethers.parseUnits("27600", "gwei"),
    maxFeePerGas: ethers.parseUnits("80000", "gwei"),
  });

  await contract.waitForDeployment();
  console.log("WKRCPayment deployed to:", await contract.getAddress());
}

main().catch((error) => {
  console.error(error);
  process.exitCode = 1;
});
You must pass maxPriorityFeePerGas and maxFeePerGas on every deploy and send call. Hardhat does not pick up the network-enforced minimum automatically — omitting them causes the transaction to be rejected.

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Deploy to Testnet

npx hardhat run scripts/deploy.js --network stablenet_testnet

Deploying with: 0xYourWalletAddress
WKRCPayment deployed to: 0xABC...
Block inclusion can take up to 1–2 minutes. If waitForDeployment() appears to hang, the transaction is already in the mempool. Do not cancel and retry — that may cause a nonce conflict.

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Verify on Explorer

Open explorer.stablenet.network and search for your contract address. You should see a Contract Creation transaction with status Success.

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Next steps

Deploy with Foundry

Deploy the same contract using Foundry’s forge and cast.

Listen to Events

Subscribe to on-chain events with WebSocket.

RPC API Reference

Full list of supported JSON-RPC methods.

Fee Delegation

Let a separate account pay gas for your users.