debug_traceBlockByHash - Zetachain RPC Method

async function findReverts(provider, blockHash) {
  const traces = await provider.send('debug_traceBlockByHash', [
    blockHash,
    { tracer: 'callTracer' }
  ]);

  const reverts = [];

  for (const trace of traces) {
    if (trace.result.error) {
      reverts.push({
        txHash: trace.txHash,
        error: trace.result.error,
        revertReason: trace.result.revertReason || 'N/A',
        from: trace.result.from,
        to: trace.result.to,
        gasUsed: parseInt(trace.result.gasUsed, 16)
      });
    }

    // Also check sub-calls for internal reverts
    const internalReverts = findInternalReverts(trace.result.calls || []);
    if (internalReverts.length > 0) {
      reverts.push({
        txHash: trace.txHash,
        internalReverts,
        topLevelSuccess: !trace.result.error
      });
    }
  }

  console.log(`Found ${reverts.length} reverted transactions out of ${traces.length}`);
  for (const r of reverts) {
    console.log(`  ${r.txHash}: ${r.error || 'internal revert'}`);
  }
  return reverts;
}

function findInternalReverts(calls) {
  const reverts = [];
  for (const call of calls) {
    if (call.error) {
      reverts.push({ type: call.type, to: call.to, error: call.error });
    }
    reverts.push(...findInternalReverts(call.calls || []));
  }
  return reverts;
}

import requests

def analyze_token_transfers(block_hash):
    response = requests.post('https://api-zetachain-mainnet.n.dwellir.com/YOUR_API_KEY', json={
        'jsonrpc': '2.0',
        'method': 'debug_traceBlockByHash',
        'params': [block_hash, {'tracer': 'callTracer'}],
        'id': 1
    })
    traces = response.json()['result']

    # ERC-20 transfer(address,uint256) selector
    TRANSFER_SELECTOR = '0xa9059cbb'
    # ERC-20 transferFrom(address,address,uint256) selector
    TRANSFER_FROM_SELECTOR = '0x23b872dd'

    transfers = []

    for trace in traces:
        calls = flatten_calls(trace['result'])
        for call in calls:
            input_data = call.get('input', '')
            if input_data.startswith(TRANSFER_SELECTOR) or \
               input_data.startswith(TRANSFER_FROM_SELECTOR):
                transfers.append({
                    'tx_hash': trace['txHash'],
                    'token_contract': call['to'],
                    'from': call['from'],
                    'type': call['type'],
                    'gas_used': int(call.get('gasUsed', '0x0'), 16)
                })

    print(f'Found {len(transfers)} token transfers in block')
    # Group by token contract
    by_token = {}
    for t in transfers:
        by_token.setdefault(t['token_contract'], []).append(t)

    for token, txs in by_token.items():
        print(f'  {token}: {len(txs)} transfers')

    return transfers

def flatten_calls(trace):
    calls = [trace]
    for sub in trace.get('calls', []):
        calls.extend(flatten_calls(sub))
    return calls

analyze_token_transfers('0x1c062dc4e905e15e9c1099a63c36a1c6fd5f0a6d45334d2e6c4eec3f668bde5f')

async function getBlockStateDiff(provider, blockHash) {
  // Get prestate — accounts state before each transaction
  const prestateTraces = await provider.send('debug_traceBlockByHash', [
    blockHash,
    { tracer: 'prestateTracer', tracerConfig: { diffMode: true } }
  ]);

  const allAddresses = new Set();
  const balanceChanges = {};

  for (const trace of prestateTraces) {
    const pre = trace.result.pre || trace.result;
    const post = trace.result.post || {};

    for (const [addr, state] of Object.entries(pre)) {
      allAddresses.add(addr);
      if (!balanceChanges[addr]) {
        balanceChanges[addr] = {
          preBal: BigInt(state.balance || '0x0'),
          postBal: BigInt((post[addr]?.balance) || state.balance || '0x0')
        };
      }
    }
  }

  console.log(`Block touched ${allAddresses.size} unique addresses`);
  for (const [addr, change] of Object.entries(balanceChanges)) {
    const diff = change.postBal - change.preBal;
    if (diff !== 0n) {
      console.log(`  ${addr}: ${diff > 0n ? '+' : ''}${diff} wei`);
    }
  }

  return balanceChanges;
}

async function safeTraceBlockByHash(provider, blockHash, options = {}) {
  const defaultOptions = {
    tracer: 'callTracer',
    timeout: '60s',
    ...options
  };

  try {
    return await provider.send('debug_traceBlockByHash', [blockHash, defaultOptions]);
  } catch (error) {
    if (error.code === -32601) {
      throw new Error('debug_traceBlockByHash not available — ensure archive node with debug API');
    }
    if (error.code === -32000 && error.message?.includes('not found')) {
      throw new Error(`Block ${blockHash} not found — verify the hash is correct`);
    }
    if (error.message?.includes('timeout')) {
      console.warn('Trace timed out — retrying with top-level calls only');
      return await provider.send('debug_traceBlockByHash', [
        blockHash,
        { tracer: 'callTracer', tracerConfig: { onlyTopCall: true } }
      ]);
    }
    throw error;
  }
}