Gas estimation error when sending ERC 20 tokens programmatically with Disperse
Ethereum smart contracts have become an integral part of any blockchain development project. However, one of the common problems that can arise during the software deployment and launch of smart contracts is the gas estimation error that can occur due to sending large volumes of data to the Ethereum network.
In this article, we will discuss how to estimate the cost of gas when deploying a smart contract using Disperse, a popular decentralized application (dApp) platform for Ethereum-based applications. In particular, we will focus on a common scenario where multiple ERC 20 tokens are sent to different wallets programmatically.
Gas Estimation Error
When sending data to the Ethereum network, for example, sending ERC 20 tokens from one wallet to several other wallets, a gas estimation error can occur for several reasons:
- Number of tokens: the number of tokens sent and received exceeds the available storage space in the wallet of each recipient.
- Gas prices: Gas prices are higher than the current market rate, so the transaction consumes more gas than necessary.
Disperse solution: estimated cost of gas
To estimate the cost of gas to deploy a smart contract with Disperse, we can use their gasEstimator function, which provides an estimated cost of gas to deploy and call a specific function. In our case, we will use it to estimate the cost of gas for sending ERC 20 tokens from one wallet to several other wallets.
Code Snippet
Here is an example code snippet demonstrating how to use the Disperse gasEstimator function:
`solidity
pragma solidity ^0.8.0;
contract MySmartContract {
// The function of sending ERC 20 tokens to several wallets
function transferTokensToMulti(address[] memory receives) public {
gasEstimator(
"transferTokensToMulti",
"MySmartContract",
"myToken",
(address(_recipient), uint256(_amount)) => _recipient,
_gas, // The requested gas estimate for the function
_maxGas // The maximum allowable cost of gas per transaction
).result(
"passed",
true, // success sign
"_success", // result message
_gasCost // estimated cost of gas in wei
);
// Transfer tokens to each recipient
for (uint256 i = 0; i < receives.length; i++) {
transferTokens(_tokenAddress, received[i], _amount);
}
}
// The function of sending ERC 20 tokens from one wallet to several other wallets
function transferTokens(address source, address destination, uint256 amount) internal {
// Calculation of the cost of gas for the transfer operation
uint256 gasCost = calculateGasCost(source, destination, amount);
// Transfer tokens usingtransfer‘ Disperse function
TransferResult result = disperseTransfer(source, destination, amount);
require(result.status == 0x00, “Translation failed”);
}
// Gas cost estimation function for smart contract deployment using Disperse
function calculateGasCost(address source, address destination, uint256 amount) internal returns (uint256) {
// Call function gasEstimator from Disperse
return gasEstimator(
“transferTokensToMulti”,
“MySmartContract”,
“myToken”,
(address(_recipient), uint256(_amount)) => _recipient,
0, // Requested gas price estimate for smart contract deployment
2000000 // The maximum permissible cost of gas per function call
).