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I need help on how to charge a transaction fee in ethereum smart contract using web3? Also which web3 API can be used to check the validation of enough gas on the frontend of smart contract?

  • You charge fee in the contract, what does web3 has to do with this??? – goodvibration Jun 30 at 10:25
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Do you want to estimate the fee of the transaction?

let gasPrice = new BigNumber(15).times(1000000000);
let gasLimit = new BigNumber(21000);
let estimateFee = new BigNumber(gasPrice.times(gasLimit)).dividedBy(1000000000000000000).toString();

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