시스템 모듈 사용

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.24;
 
interface IStaking {
    function delegate(
        address delegatorAddress,
        string calldata validatorAddress,
        uint256 amount
    ) external returns (bool success);
 
    function delegation(
        address delegatorAddress,
        string calldata validatorAddress
    ) external view returns (uint256 shares, uint256 balance);
}
 
contract StakingHelper {
    address constant STAKING_PRECOMPILE =
        0x0000000000000000000000000000000000000800;
 
    /// @notice 이 계약에서 검증자에게 STABLE 토큰을 위임합니다.
    function delegateToValidator(
        string calldata validatorAddress,
        uint256 amount
    ) external returns (bool) {
        return IStaking(STAKING_PRECOMPILE).delegate(
            address(this),
            validatorAddress,
            amount
        );
    }
 
    /// @notice 이 계약의 검증자에 대한 현재 위임을 읽습니다.
    function myDelegation(string calldata validatorAddress)
        external
        view
        returns (uint256 shares, uint256 balance)
    {
        return IStaking(STAKING_PRECOMPILE).delegation(
            address(this),
            validatorAddress
        );
    }
}

// SAFE: 사전 컴파일 주소는 Stable에 고정되어 있으며 변경되지 않습니다.

// queryDelegation.ts
import { ethers } from "ethers";
import "dotenv/config";
 
const provider = new ethers.JsonRpcProvider("https://rpc.testnet.stable.xyz");
 
const STAKING_PRECOMPILE = "0x0000000000000000000000000000000000000800";
 
const staking = new ethers.Contract(
  STAKING_PRECOMPILE,
  [
    "function delegation(address delegator, string validator) view returns (uint256 shares, uint256 balance)",
  ],
  provider
);
 
const delegator = "0xDelegatorAddress";
const validator = "stablevaloper1..."; // bech32 검증자 운영자 주소
 
const [shares, balance] = await staking.delegation(delegator, validator);
console.log("Delegation shares: ", shares.toString());
console.log("Delegation balance:", ethers.formatUnits(balance, 18), "STABLE");

npx tsx queryDelegation.ts

Delegation shares:  1000000000000000000000
Delegation balance: 1000.0 STABLE

// watchUnbonding.ts
import { ethers } from "ethers";
 
const provider = new ethers.JsonRpcProvider("https://rpc.testnet.stable.xyz");
 
const STABLE_SYSTEM = "0x0000000000000000000000000000000000009999";
 
const stableSystem = new ethers.Contract(
  STABLE_SYSTEM,
  [
    "event UnbondingCompleted(address indexed delegator, address indexed validator, uint256 amount)",
  ],
  provider
);
 
stableSystem.on("UnbondingCompleted", (delegator, validator, amount, event) => {
  console.log("Unbonding completed for:", delegator);
  console.log("Amount:", ethers.formatEther(amount), "STABLE");
  console.log("Tx:", event.log.transactionHash);
});
 
console.log("Listening for UnbondingCompleted events...");

npx tsx watchUnbonding.ts

Listening for UnbondingCompleted events...
Unbonding completed for: 0xabcd...
Amount: 100.0 STABLE
Tx: 0x12ab...