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Metamask Limitations on Method Calls: Understanding Contract Execution Speed
Using the MetaMask browser extension is essential when interacting with a decentralized application (dApp) built on a blockchain like Ethereum. However, one limitation you may run into is if you rely heavily on contract.methods.some_method.call() to read data from your contracts. The dApp understands how often it can be called and what its potential impact on the application is.
Reading Data Using contract.methods.some_method.call()
Typically, calling a contract method in a script executed by MetaMask or another external code execution environment (like Remix) will incur overhead for the following reasons:
- Gas: The gas costs associated with executing Ethereum transactions and method calls can be significant.
- Network Latency: Data transfer between the MetaMask JavaScript environment, the blockchain network, and the dApp smart contracts occurs at a certain speed.
The specific gas cost depends on various factors, including:
- Contract complexity (more complex contracts require more gas)
- Network congestion
- Amount of data read
To give you an idea, here are some rough estimates for reading different amounts of data.
| Data Reading | Estimated Gas Cost |
| :——- | :—————– |
| 100 bytes | ~15-25 gwei (0.0000125 ETH) |
| 1KB | ~50-70 gwei (~0.0045 ETH) |
| 10KB | ~150-250 gwei (~0.0149 ETH) |
Blacklist or Block Apps
While MetaMask is a powerful tool, excessive method calls can impact your application’s performance. and app developers may be blacklisted or blocked.
Here are some reasons why this can happen:
- High number of method calls: If methods are called too frequently, the network can become congested, resulting in increased latency.
- Gas charges exceed available funds
: Excessive gas charges can deplete your MetaMask or other Ethereum accounts, making it difficult to use your app.
To mitigate these risks, consider the following best practices.
1. Use « async/wait » and « try/catch » blocks.
When interacting with dApps contracts, use asynchronous programming techniques to avoid blocking the current thread while waiting for method calls or executing the contract code.
const result = await yourContract.methods.someMethod.call();
2. Optimize method calls
To reduce gas costs and network latency:
- Reduce complex contracts: Less complex contracts require less gas, resulting in lower average fees.
- Use a more efficient data format (e.g. « Buffer » instead of simple JavaScript arrays).