Determining Which Token Has Been Staked on Your Contract

When developing your smart contract and implementing user staking functionality, ensuring that users can track their allocated tokens is crucial for transparency and security. In this article, we will explore how to find out which token a user has staked on your contract.

Understanding the ERC20 Token Standard

Before diving into the solution, it is essential to understand the ERC20 token standard. ERC-20 is an open standard for representing and trading digital tokens, designed by Ethereum co-founder Joseph Lubin. Tokens can represent a variety of assets, such as cryptocurrencies, art, or even utility tokens.

Using the Etherscan API to Track Staked Tokens

One way to determine which token a user has staked on your contract is to use the Etherscan API provided by Polygon (formerly Matic Network). Etherscan allows you to search your smart contracts and retrieve information about staked assets using its built-in functions.

Here is an example of how you can use the Etherscan API to track staked tokens:

• Create a contract address

  

  : Replace “YOUR_CONTRACT_ADDRESS” with the address of your smart contract.

• Define a function to query: Create a function that takes two arguments: address and tokenAddress. This function will return an object containing information about staked tokens on your contract.

Example:

function getStakedTokens(address, tokenAddress) {
const account = Etherscan.connect();
const result = wait account.getAccountsByTokenId({ tokenid: tokenAddress });
return result;
}

• Call the function: When a user stakes their token on your contract, call the getStakedTokens function with their address and token ID.

Example:

// User staked ETH
userStakedEth = await getStakedTokens(userAddress, '0x1234567890abcdef');

• Analyze the result: The Etherscan API returns an object containing information about each account in your contract. Analyze this object to determine which tokens the user staked.

Example:

// User has deposited 100 ETH into their Ethereum account
userStakedEth = {
account: '0x1234567890abcdef',
balance: 100,
tokens: ['ETH', 'ETH', ...] // more information about staked tokens
};
console.log(userStakedEth.tokens);
// Output: ['ETH']

Additional Considerations

While using the Etherscan API is a reliable way to track staked tokens, there are some limitations and considerations:

• Gas Costs: Using the Etherscan API incurs gas costs when querying your smart contract. This can be expensive for large orders or complex queries.

• Network Fees: If you are running a decentralized application (dApp) on the Ethereum network or other blockchain networks, you may incur network fees when querying your smart contract.

Conclusion

Determining which token has been inserted into your contract is now easier with the Etherscan API. Once you understand how to query your smart contracts and analyze the result, you can provide users with valuable information about their allocated tokens. While there are some limitations and considerations to keep in mind, this approach offers a reliable and efficient way to manage user staking functionality.