Ethereum: Gas estimation error when trying to send ERC 20 to multiple addresses

Gas estimation error when programmatically sending ERC 20 tokens with Disperse

Ethereum smart contracts have become an essential part of any blockchain development project. However, a common problem that can arise when deploying and executing smart contracts programmatically is gas estimation error, which can result from sending large amounts of data to the Ethereum network.

In this article, we will look at how to estimate the gas cost of a smart contract deployment using Disperse, a popular decentralized application (dApp) platform for Ethereum-based applications. Specifically, 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, such as sending ERC 20 tokens from one wallet to several others, a gas estimation error can occur for several reasons:

• Token Quantity: The amount of tokens sent and received exceeds the available storage space in each recipient’s wallet.

• Gas Price

  : Gas prices are higher than the current market price, causing the transaction to consume more gas than necessary.

Disperse Solution: Estimated Gas Cost

To estimate the gas cost of deploying a smart contract using Disperse, we can use its “gasEstimator” function, which provides an estimated gas cost to deploy and call a specific function. In our case, we will use it to estimate the gas cost of sending ERC 20 tokens from one wallet to several others.

Code Snippet

Here is an example code snippet showing how to use Disperse’s gasEstimator function:

«solidity

solidity pragma ^0.8.0;

contract MySmartContract {

// Function to send ERC 20 tokens to multiple wallets

public function transferTokensToMulti(address[] recipients memory) {

Gas Estimator(

«transferTokensToMulti»,

«My Smart Contract»,

«myToken»,

(address(_recipient), uint256(_amount)) => _recipient,

_gas, // Gas estimate requested for the function

_maxGas // Maximum gas cost allowed per transaction

).result(

«transferred»,

true, // success flag

«_success», // result message

_gasCost // estimated cost of the transaction gas in wei

);

// Transfer tokens to each recipient

for (uint256 i = 0; i < recipient length; i++) {

transferTokens(_tokenAddress, recipients[i], _amount);

}

}

// Function to send ERC 20 tokens from one wallet to multiple other wallets

function transferTokens(source address, destination address, amount uint256) internal {

// Calculate gas cost for transfer operation

uint256 gasCost = calculateGasCost(source, destination, amount);

// Transfer tokens using Disperse’s transfer function

TransferResult result = disperseTransfer(source, destination, amount);

require(result.status == 0x00, «Transfer failed»);

}

// Function to estimate gas cost of a smart contract deployment using Disperse

function calculateGasCost(sourceAddress, destinationAddress, amount uint256) internal returns (uint256) {

// Calling gasEstimator function from Disperse

returns gasEstimator(

«transferTokensToMulti»,

«My smart contract»,

«myToken»,

(address(_recipient), uint256(_amount)) => _recipient,

0, // Estimated gas required for smart contract deployment

2000000 // Maximum gas cost allowed per function call

).