@bcoders.gr/eth-provider
Version:
High-Performance IPC Ethereum Provider with Advanced Optimizations - Refactored for Better Performance
166 lines (136 loc) • 8.16 kB
JavaScript
import { IPCProvider } from '../index.js';
/**
* Demonstration of custom testing and development methods
* These methods are particularly useful for testing with Anvil/Hardhat
*/
async function demonstrateTestingMethods() {
console.log('🧪 Testing & Development Methods Demo\n');
console.log('====================================\n');
// Initialize provider for testing environment
const provider = new IPCProvider('/tmp/anvil.ipc', {
cacheEnabled: true,
batchRequests: true,
metricsEnabled: true
});
try {
console.log('📋 BLOCKCHAIN STATE MANAGEMENT');
console.log('==============================');
console.log('// Mine a new block');
console.log('const newBlockNumber = await provider.mine();');
console.log('console.log(`Mined block: ${newBlockNumber}`);\n');
console.log('// Create a snapshot for testing');
console.log('const snapshot = await provider.request("evm_snapshot", []);');
console.log('console.log(`Snapshot created: ${snapshot}`);\n');
console.log('// Reset to snapshot');
console.log('await provider.snapreset();');
console.log('console.log("Reverted to snapshot");\n');
console.log('// Reset entire chain state');
console.log('const resetResult = await provider.reset();');
console.log('console.log(`Chain reset: ${resetResult}`);\n');
console.log('📋 EVENT FILTERING METHODS');
console.log('==========================');
console.log('// Get mint events for a token contract');
console.log('const mintEvents = await provider.getMint(');
console.log(' "0xA0b86a33E6417c8C4C8C8C8C8C8C8C8C8C8C8C8C", // Token contract');
console.log(' 0, // From block 0');
console.log(' "latest" // To latest block');
console.log(');');
console.log('console.log(`Found ${mintEvents.length} mint events`);\n');
console.log('// Get custom events with specific topics');
console.log('const transferEvents = await provider.getPastLogs(');
console.log(' "0xA0b86a33E6417c8C4C8C8C8C8C8C8C8C8C8C8C8C", // Contract address');
console.log(' 0, // From block');
console.log(' "latest", // To block');
console.log(' [ // Topics array');
console.log(' "0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef", // Transfer event');
console.log(' null, // Any from address');
console.log(' "0x000000000000000000000000742d35Cc6634C0532925a3b8D400E4C0C0C8C8C8" // Specific to address');
console.log(' ]');
console.log(');');
console.log('console.log(`Found ${transferEvents.length} transfer events`);\n');
console.log('📋 COMPLETE TESTING WORKFLOW');
console.log('============================');
console.log('// 1. Setup test environment');
console.log('await provider.reset();');
console.log('console.log("Test environment reset");\n');
console.log('// 2. Execute test transactions');
console.log('const txHash = await provider.sendTransaction({');
console.log(' from: "0x742d35Cc6634C0532925a3b8D400E4C0C0C8C8C8",');
console.log(' to: "0xA0b86a33E6417c8C4C8C8C8C8C8C8C8C8C8C8C8C",');
console.log(' value: provider.toWei("1", "ether"),');
console.log(' gas: "21000"');
console.log('});');
console.log('console.log(`Transaction sent: ${txHash}`);\n');
console.log('// 3. Mine block to confirm transaction');
console.log('const blockNumber = await provider.mine();');
console.log('console.log(`Transaction mined in block: ${blockNumber}`);\n');
console.log('// 4. Verify transaction');
console.log('const receipt = await provider.getTransactionReceipt(txHash);');
console.log('console.log(`Transaction status: ${receipt.status}`);\n');
console.log('// 5. Check events generated');
console.log('const logs = await provider.getPastLogs(');
console.log(' receipt.to,');
console.log(' receipt.blockNumber,');
console.log(' receipt.blockNumber,');
console.log(' [] // All events');
console.log(');');
console.log('console.log(`Events generated: ${logs.length}`);\n');
console.log('// 6. Reset for next test');
console.log('await provider.snapreset();');
console.log('console.log("Ready for next test");\n');
console.log('📋 ADVANCED TESTING PATTERNS');
console.log('============================');
console.log('// Time manipulation');
console.log('await provider.request("evm_increaseTime", [3600]); // +1 hour');
console.log('await provider.mine(); // Mine to apply time change\n');
console.log('// Set next block timestamp');
console.log('const futureTime = Math.floor(Date.now() / 1000) + 86400; // +1 day');
console.log('await provider.request("evm_setNextBlockTimestamp", [futureTime]);\n');
console.log('// Impersonate account');
console.log('await provider.request("anvil_impersonateAccount", ["0x742d35Cc6634C0532925a3b8D400E4C0C0C8C8C8"]);\n');
console.log('// Set account balance');
console.log('await provider.request("anvil_setBalance", [');
console.log(' "0x742d35Cc6634C0532925a3b8D400E4C0C0C8C8C8",');
console.log(' provider.toHex(provider.toWei("100", "ether"))');
console.log(']);\n');
console.log('// Set storage slot');
console.log('await provider.request("anvil_setStorageAt", [');
console.log(' "0xA0b86a33E6417c8C4C8C8C8C8C8C8C8C8C8C8C8C", // Contract');
console.log(' "0x0", // Storage slot');
console.log(' "0x" + "1".padStart(64, "0") // New value');
console.log(']);\n');
console.log('📊 TESTING UTILITIES');
console.log('====================');
console.log('// Batch multiple test operations');
console.log('const testResults = await provider.batchRequest([');
console.log(' { method: "eth_blockNumber", params: [] },');
console.log(' { method: "eth_getBalance", params: ["0x742d35Cc6634C0532925a3b8D400E4C0C0C8C8C8", "latest"] },');
console.log(' { method: "eth_getTransactionCount", params: ["0x742d35Cc6634C0532925a3b8D400E4C0C0C8C8C8", "latest"] }');
console.log(']);');
console.log('console.log(`Test data: ${JSON.stringify(testResults)}`);\n');
// Show provider statistics
const stats = provider.getStats();
console.log('📊 PROVIDER STATISTICS');
console.log('======================');
console.log('Provider Performance:');
console.log(`- Cache enabled: ${stats.cache.enabled}`);
console.log(`- Batch processing: ${stats.batch ? 'enabled' : 'disabled'}`);
console.log(`- Metrics tracking: ${stats.metrics.enabled}`);
console.log(`- Object pooling: ${stats.pool.totalPoolSize} objects`);
} catch (error) {
console.error('❌ Demo error:', error.message);
console.log('\n💡 Note: This demo shows testing method usage. Requires Anvil or similar testing client.');
}
console.log('\n✅ Testing methods demonstration complete!');
console.log('\n📚 Custom Methods Summary:');
console.log('==========================');
console.log('✅ mine() - Mine a new block');
console.log('✅ reset() - Reset chain state with forking');
console.log('✅ snapreset() - Revert to snapshot or reset');
console.log('✅ snapdelete() - Delete current snapshot');
console.log('✅ getMint() - Get mint events for token contracts');
console.log('✅ getPastLogs() - Get filtered events with custom topics');
console.log('\n🧪 Perfect for testing with Anvil, Hardhat, or Ganache!');
}
// Run demonstration
demonstrateTestingMethods().catch(console.error);