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Metamask: Unable to Estimate Gas When Calling withdraw Function in Solidity Contract on Polygon Network
As a developer of a blockchain-based smart contract, it’s essential to consider factors that can impact the performance and efficiency of your contracts. One critical aspect is estimating gas consumption, particularly when calling the withdraw function. In this article, we’ll explore why Metamask may struggle with estimating gas for withdrawing funds from your Solidity contract on the Polygon network.
Why Metamask struggles
Metamask is a popular platform that enables users to manage their cryptocurrency assets on multiple networks, including Ethereum, Binance Smart Chain (BSC), and Polygon. When calling the withdraw function in your Solidity Contract on the Polygon Network using Metamask, you may encounter issues with estimating gas consumption.
The reason for this issue lies in the way Solidity contracts are compiled and executed on the Polygon network. The Ethereum Virtual Machine (EVM) is a virtual machine that runs Solidity code, but it is not the same as the EVM used on the Polygon network.
Gas estimate vs. gas estimate EVM compatibility
Estimating gas consumption for a smart contract involves several factors, including:
- Instruction set: The instruction set architecture (ISA) of your contract, which defines the possible instructions that can be executed.
- Code Optimization: How well your code is optimized for performance, including loop unrolling and constant folding.
- Gas costs: The estimated cost of each gas unit in your local currency.
In Solidity, most functions are called with a call instruction, which executes the function directly on the EVM. However, when using Metamask to call the withdraw function on the Polygon network, you need to consider the following:
- Instruction set: The Ethereum Instruction Set (EIS) is used on the Polygon network, but it is not identical to the EVM ISA.
- Gas costs: Gas consumption estimates for the
withdrawfunction are different from those on the EVM.
Metamask limitations
To overcome these challenges, Metamask introduces several workarounds:
- Use a custom gas estimation tool: You can use a third-party service that provides accurate gas estimation for Solidity contracts.
- Optimizing your code using smart contract templates: Some services offer pre-optimized templates for common Solidity contracts, which can help reduce gas consumption.
- Calling the
withdrawfunction directly from Metamask: You can use theeth_sendRawTransactionmethod to send a transaction to the Polygon network and call thewithdrawfunction on the contract.
Conclusion
While it’s possible to overcome these challenges by using third-party tools or optimizing your code, Metamask may struggle with estimating gas consumption for withdrawing funds from your Solidity contract on the Polygon network. If you’re experiencing issues with gas estimation, consider exploring alternative solutions or contacting the Polygon Network Support Team for assistance.
Recommendations
To improve your chances of success, make sure to:
- Use a reliable gas estimation tool: Choose a service that provides accurate estimates for your Solidity contract.
- Optimize your code using smart contract templates: Leverage pre-optimized templates to reduce gas consumption.
- Call the
withdrawfunction directly from Metamask: Use theeth_sendRawTransactionmethod to send a transaction and call thewithdrawfunction on the contract.
By following these recommendations, you can improve your chances of success when calling the withdraw function in your Solidity contract on the Polygon network.
