# General

### TypeScript Compilation Errors

#### Type Mismatch Errors

```typescript
// Error: Type 'string' is not assignable to type '`0x${string}`'
const address: `0x${string}` = userAddress;

// ✅ Solution
const contractAddress = getConfig(networkType).contractAddress as `0x${string}`;
const method = 'convertedB3trOf' as const;

// ✅ Validate addresses
import { humanAddress } from '@vechain/vechain-kit/utils';
const validatedAddress = humanAddress(address);
```

#### BigInt Serialization Errors

```typescript
import { hashFn } from 'wagmi/query';
// Error: Do not know how to serialize a BigInt

// ✅ Solution: set wagmi's hashfn as default queryKeyHashFn
export const queryClient = new QueryClient({
  defaultOptions: {
    queries: {
      queryKeyHashFn: hashFn,
      retry: 0,
      retryOnMount: false,
      staleTime: 30000,
      // other options
    },
  },
})

```

### React Query Issues

#### Cache Invalidation Not Working

```typescript
// ✅ Good: Consistent query key structure
const queryKey = getCallClauseQueryKeyWithArgs({
  abi: VOT3__factory.abi,
  address: contractAddress,
  method: 'balanceOf' as const,
  args: [userAddress],
});

// ✅ Proper invalidation
queryClient.invalidateQueries({ queryKey });
```

### Contract Interaction Issues

**Migration from manual ABI lookup:**

```typescript
// Old pattern
const functionAbi = vot3Abi.find((e) => e.name === "convertedB3trOf");
const res = await thor.account(contractAddress).method(functionAbi).call(address);

// ✅ New pattern
import { VOT3__factory } from '@vechain/vechain-kit/contracts';
return useCallClause({
  abi: VOT3__factory.abi,
  address: contractAddress,
  method: 'convertedB3trOf' as const,
  args: [address ?? ''],
  queryOptions: { enabled: !!address },
});
```

#### Transaction Building Fails

```typescript
// Old manual transaction building
const buildConvertTx = (thor: Connex.Thor, amount: string) => {
  const functionAbi = abi.find((e) => e.name === "convertToVOT3");
  const clause = thor.account(contractAddress).method(functionAbi).asClause(amount);
  return { ...clause, comment: `Convert ${amount}`, abi: functionAbi };
};

// ✅ New clause building
import { VOT3__factory } from '@vechain/vechain-kit/contracts';
const buildConvertTx = (thor: ThorClient, amount: string): EnhancedClause => {
  const { clause } = thor.contracts
    .load(contractAddress, VOT3__factory.abi)
    .clause.convertToVOT3(ethers.parseEther(amount));

  return {
    ...clause,
    comment: `Convert ${humanNumber(amount)} B3TR to VOT3`,
  };
};
```

### Performance Issues

#### Too Many Network Requests

```typescript
// ✅ Batch multiple calls
const useTokenData = (tokenAddress: string) => {
  return useQuery({
    queryKey: ['TOKEN_DATA', tokenAddress],
    queryFn: async () => {
      const results = await executeMultipleClausesCall({
        thor,
        calls: [
          { abi: ERC20__factory.abi, functionName: 'symbol', address: tokenAddress, args: [] },
          { abi: ERC20__factory.abi, functionName: 'decimals', address: tokenAddress, args: [] },
          { abi: ERC20__factory.abi, functionName: 'totalSupply', address: tokenAddress, args: [] },
        ],
      });
      
      return {
        symbol: results[0][0],
        decimals: results[1][0],
        totalSupply: results[2][0],
      };
    },
    enabled: !!tokenAddress,
    staleTime: 60000, // Cache for 1 minute
  });
};
```

### Network Issues

#### RPC Endpoint Problems

```typescript
// ✅ retry configuration
const { data, error } = useCallClause({
  queryOptions: {
    retry: (failureCount, error) => {
      if (error.message.includes('reverted')) return false;
      if (error.message.includes('invalid')) return false;
      return failureCount < 3;
    },
    retryDelay: (attemptIndex) => Math.min(1000 * 2 ** attemptIndex, 30000),
  },
});
```

### Testing Issues

#### Mocking Problems

```typescript
// ✅ Mock VeChain Kit hooks
jest.mock('@vechain/vechain-kit', () => ({
  useWallet: () => ({
    account: { address: '0x123...' },
    isConnected: true,
  }),
  useCallClause: () => ({
    data: [BigInt('1000000000000000000')],
    isLoading: false,
    error: null,
  }),
}));
```


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.vechainkit.vechain.org/troubleshooting/general.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.