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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 Foundry’s forge and cast tools.

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What you’ll learn

By the end of this tutorial, you’ll be able to:
  • Configure a Foundry project for StableNet Testnet
  • Deploy a WKRC payment contract using forge script
  • Call contract functions with cast send and verify the result on Explorer

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Prerequisites

  • Foundry installed — run forge --version to check. If not installed: 
    curl -L https://foundry.paradigm.xyz | bash
foundryup
  • Testnet WKRC from the Faucet

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Scaffold your project

forge init stablenet-demo
cd stablenet-demo

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Configure foundry.toml

Add the StableNet Testnet endpoint to foundry.toml: 
[profile.default]
src = "src"
out = "out"
libs = ["lib"]

[rpc_endpoints]
stablenet_testnet = "https://api.test.stablenet.network"

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Write WKRCPayment.sol

Delete the placeholder and create src/WKRCPayment.sol: 
rm src/Counter.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));
    }
}
Compile to confirm there are no errors: 
forge build

[⠒] Compiling...
Compiler run successful!

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Write the deploy script

Create script/DeployWKRCPayment.s.sol: 
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.20;

import {Script, console} from "forge-std/Script.sol";
import {WKRCPayment} from "../src/WKRCPayment.sol";

contract DeployWKRCPayment is Script {
    function run() external {
        vm.startBroadcast();
        WKRCPayment payment = new WKRCPayment();
        console.log("WKRCPayment deployed at:", address(payment));
        vm.stopBroadcast();
    }
}

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Deploy to Testnet

Never commit your private key to version control. Store it in a .env file and add .env to .gitignore.
export PRIVATE_KEY=0xYourPrivateKey

forge script script/DeployWKRCPayment.s.sol \
  --rpc-url https://api.test.stablenet.network \
  --private-key $PRIVATE_KEY \
  --priority-gas-price 27600000000000 \
  --broadcast

Script ran successfully.

== Logs ==
WKRCPayment deployed at: 0xABC...

Chain 8283

✅ Hash: 0xDEF...
Contract Address: 0xABC...
Block: NNNN
Save the Contract Address — you need it in the next step.
StableNet enforces a minimum priority fee set by the GovValidator contract. Pass --priority-gas-price 27600000000000 on every forge script and cast send call.

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Approve WKRC and send a payment

Before calling pay(), approve the deployed contract to spend WKRC from your wallet: 
export CONTRACT=0xABC...
export RECIPIENT=0xRecipientAddress
export AMOUNT=1000000000000000000
export WKRC=0x0000000000000000000000000000000000001000

# Approve the contract to spend 1 WKRC
cast send $WKRC \
  "approve(address,uint256)" $CONTRACT $AMOUNT \
  --rpc-url https://api.test.stablenet.network \
  --private-key $PRIVATE_KEY \
  --priority-gas-price 27600000000000

# Call pay() to transfer to the recipient
cast send $CONTRACT \
  "pay(address,uint256)" $RECIPIENT $AMOUNT \
  --rpc-url https://api.test.stablenet.network \
  --private-key $PRIVATE_KEY \
  --priority-gas-price 27600000000000
Confirm the allowance was consumed: 
cast call $CONTRACT \
  "allowanceOf(address)(uint256)" $RECIPIENT \
  --rpc-url https://api.test.stablenet.network

0

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Verify on Explorer

Open explorer.stablenet.network and search for your contract address. You should see the deployment transaction, the approve call on the WKRC contract, and the pay call with a Payment event in the logs.

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Next steps

Deploy with Hardhat

Deploy the same contract using Hardhat and ethers.js.

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.