Troubleshooting

Common issues and solutions for the TypeScript SDK (@opinion-labs/opinion-clob-sdk v0.5.2).

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Installation Issues

Cannot find module '@opinion-labs/opinion-clob-sdk'

Problem: TypeScript or Node.js cannot locate the SDK package.

Solution:

1

Verify installation

Run:

npm list @opinion-labs/opinion-clob-sdk

2

Install the package

If not installed, run:

npm install @opinion-labs/opinion-clob-sdk

3

Monorepo/workspace check

If using a monorepo or workspace, ensure the dependency is in the correct package.json.

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ERR_REQUIRE_ESM or "require() of ES Module not supported"

Problem: The SDK is an ESM (ECMAScript Module) package, but your project uses CommonJS require().

Solution:

Option A - Switch your project to ESM:

Add "type": "module" to your package.json:

{
  "type": "module"
}

Option B - Use dynamic import in CommonJS:

async function main() {
  const { Client } = await import('@opinion-labs/opinion-clob-sdk');
  // Use Client normally
}
main();

---

TypeScript compiler errors with viem types

Problem: Type errors related to Address, Hex, or other viem types.

Solution:

Ensure your tsconfig.json has the following settings:

{
  "compilerOptions": {
    "target": "ES2020",
    "module": "ES2020",
    "moduleResolution": "node16",
    "esModuleInterop": true,
    "strict": true,
    "skipLibCheck": true
  }
}

Key requirements:

• target must be ES2020 or later (for BigInt support).

• moduleResolution should be node16 or bundler.

• skipLibCheck: true helps avoid transitive type conflicts.

---

Node.js version compatibility

Problem: Runtime errors or unexpected behavior.

Solution: The SDK requires Node.js 18 or later. Check your version:

node --version

If below v18, upgrade Node.js. The SDK uses features like native fetch, BigInt, and ES modules.

---

Configuration Errors

"chainId must be one of 56" (Unsupported Chain ID)

Problem: InvalidParamError thrown during Client initialization.

Cause: Only BNB Chain mainnet (chain ID 56) is currently supported.

Solution:

import { Client, CHAIN_ID_BNB_MAINNET } from '@opinion-labs/opinion-clob-sdk';

const client = new Client({
  // ...
  chainId: CHAIN_ID_BNB_MAINNET,  // Always use 56
});

---

Missing Environment Variables

Problem: Client initialization fails due to missing credentials.

Solution:

1

Provide required fields to Client

const client = new Client({
  host: process.env.API_HOST || 'https://openapi.opinion.trade/openapi',
  apiKey: process.env.API_KEY!,           // Required
  chainId: 56,
  rpcUrl: process.env.RPC_URL!,           // Required
  privateKey: process.env.PRIVATE_KEY!,   // Required (0x-prefixed)
  multiSigAddress: process.env.MULTI_SIG_ADDRESS!,  // Required
});

2

Create a .env file

API_KEY=your_api_key
RPC_URL=https://bsc-dataseed.binance.org
PRIVATE_KEY=0xYOUR_PRIVATE_KEY
MULTI_SIG_ADDRESS=0xYOUR_MULTI_SIG_ADDRESS

3

Load environment variables

Use a library like dotenv to load it:

import 'dotenv/config';

---

API and Trading Errors

Common errno Values

errno	Meaning	How to Fix
0	Success	No action needed
100	Invalid API key	Verify API key, check for extra whitespace
200	Market not found	Verify market ID exists and is correct
201	Market not active	Market is not in ACTIVATED status
300	Order not found	Verify order ID (trans_no)
301	Order cannot be canceled	Order is already filled, canceled, or expired
303	Insufficient balance	Deposit more funds or cancel other open orders
304	Price out of range	Price must be between 0 and 1 for prediction markets
305	Amount too small	Increase order amount (minimum 1 unit)
429	Rate limit exceeded	Reduce request frequency, implement backoff
500	Internal server error	Retry after a short delay

---

InvalidParamError: "makerAmountInBaseToken is not allowed for market buy"

Problem: Attempting a market buy order with makerAmountInBaseToken.

Solution: Market buy orders must use makerAmountInQuoteToken:

// Correct - Market buy with quote token amount
const orderData: PlaceOrderDataInput = {
  marketId: 57,
  tokenId: 'TOKEN_ID',
  makerAmountInQuoteToken: '100',  // Use quote token for market buys
  orderType: OrderType.MARKET_ORDER,
  side: OrderSide.BUY,
  price: '0',
};

---

InvalidParamError: "makerAmountInQuoteToken is not allowed for market sell"

Problem: Attempting a market sell order with makerAmountInQuoteToken.

Solution: Market sell orders must use makerAmountInBaseToken:

// Correct - Market sell with base token (shares) amount
const orderData: PlaceOrderDataInput = {
  marketId: 57,
  tokenId: 'TOKEN_ID',
  makerAmountInBaseToken: '10',  // Use base token for market sells
  orderType: OrderType.MARKET_ORDER,
  side: OrderSide.SELL,
  price: '0',
};

---

OpenApiError: "Quote token not found for this market"

Problem: The market's quote token is not in the list of supported quote tokens.

Solution:

1. Ensure you are using the correct chain ID (56).

2. Call getQuoteTokens() to see supported tokens.

3. Verify the market's quote token matches one of the supported tokens.

---

OpenApiError: "Cannot place order on different chain"

Problem: The market belongs to a different chain than the client is configured for.

Solution: Ensure your chainId matches the market's chain. Currently only chain ID 56 (BNB Chain) is supported.

---

Rate Limiting (errno: 429)

Problem: Too many requests in a short period.

Solution: Implement exponential backoff:

async function withRetry<T>(fn: () => Promise<T>, maxRetries = 3): Promise<T> {
  for (let attempt = 0; attempt < maxRetries; attempt++) {
    try {
      return await fn();
    } catch (error) {
      if (error instanceof OpenApiError && error.message.includes('rate limit')) {
        const waitTime = Math.pow(2, attempt) * 1000;
        console.log(`Rate limited, waiting ${waitTime}ms...`);
        await new Promise((resolve) => setTimeout(resolve, waitTime));
        continue;
      }
      throw error;
    }
  }
  throw new Error('Max retries exceeded');
}

---

Blockchain Issues

InsufficientGasBalance

Problem: The signer wallet does not have enough BNB for gas fees.

Solution:

1

Check signer wallet balance

Check the BNB balance of your signer wallet (the wallet corresponding to privateKey).

2

Deposit BNB

Deposit BNB to the signer wallet address.

3

Know which ops require gas

Gas is required for enableTrading(), split(), merge(), and redeem().

4

Note about orders

Placing and canceling orders does NOT require gas (they are off-chain signed operations).

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Transaction Reverted

Problem: An on-chain transaction reverts.

Common causes and solutions:

• split fails: Check that you have enough collateral (USDC) in your asset wallet. The market must be in ACTIVATED, RESOLVING, or RESOLVED status.

• merge fails: You need equal amounts of Yes and No tokens. Check your position balances.

• redeem fails: Market must be in RESOLVED status. You must hold winning outcome tokens.

• enableTrading fails: Check that the signer wallet has enough BNB for gas.

---

Wrong Contract Addresses

Problem: Transactions fail because of incorrect contract addresses.

Solution: The SDK uses default contract addresses for BNB Chain. If you need to override them:

const client = new Client({
  // ... other options
  conditionalTokensAddress: '0x...',
  multiSendAddress: '0x...',
  feeManagerAddress: '0x...',
  ctfExchangeAddress: '0x...',
});

Only override these if instructed by the Opinion Labs team.

---

WebSocket Issues

"WebSocket is not connected. Call connect() first."

Problem: Attempting to subscribe or send messages before the WebSocket connection is established.

Solution: Always await the connect() call before subscribing:

const wsClient = client.createWebSocketClient({
  onOpen: () => console.log('Connected'),
});

await wsClient.connect();  // Wait for connection

// Now safe to subscribe
wsClient.subscribeMarketDepthDiff(1274, (msg) => {
  console.log(msg);
});

---

WebSocket connection drops

Problem: WebSocket disconnects unexpectedly.

Solution:

1

Heartbeat

The SDK sends automatic heartbeat messages (default every 30 seconds).

2

Reconnect on close

Use the onClose callback to detect disconnections and implement reconnection logic:

const wsClient = client.createWebSocketClient({
  onClose: async () => {
    console.log('Disconnected, reconnecting...');
    await wsClient.connect();
    // Re-subscribe to channels
  },
});

---

Performance Tips

Use Caching

The SDK caches quote tokens (1 hour) and market data (5 minutes) by default. Avoid setting TTLs to 0 unless you need real-time data:

const client = new Client({
  // ...
  quoteTokensCacheTtl: 3600,   // 1 hour (default)
  marketCacheTtl: 300,          // 5 minutes (default)
});

Batch Operations

Use batch methods for multiple orders:

// Instead of multiple placeOrder calls:
const results = await client.placeOrdersBatch(orders);

// Instead of multiple cancelOrder calls:
const results = await client.cancelOrdersBatch(orderIds);

// Cancel all at once:
const result = await client.cancelAllOrders({ marketId: 57 });

Pre-enable Trading

Call enableTrading() once at startup rather than passing checkApproval: true on every order:

// Do this once at startup
await client.enableTrading();

// Then place orders without approval check
await client.placeOrder(orderData, false);  // checkApproval = false

Use Proxy for Network Restrictions

If you are behind a firewall or in a region with network restrictions, configure a proxy:

const client = new Client({
  // ...
  proxyUrl: 'http://127.0.0.1:7890',
});

This applies to both HTTP API calls and WebSocket connections.

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Support

If you are unable to resolve your issue with the information above:

• Documentation: https://docs.opinion.trade

• Email: [e-mail]

• GitHub Issues: Report bugs on the SDK repository