Ethereum: Solving the gas limit in connecting connections
As an Ethereum developer, you probably know the concept of gas limits in intelligent contracts. When the connection is performed to a function that requires Ethereum (EVM) virtual machine, EVM has limited resources available for each function call. Gas limits come here.
When calling another contract or functions from another contract, implemented connections are often observed, in which it causes many functions in the sequence. However, when it comes to the “gaslimit” parameter of these connections, things become interesting.
In this article, we delve into the concept of gas limits and how to use them in connecting connections, with an example that uses the solidity of blockchain ethereum.
What is a gas limit?
The gas limit is a limit of gas (currency units in the Ethereum network), which can be issued by the function during performing. The gas limit is set when the contract or function is implemented and is enforced by EVM.
When the connection is made to the function, EVM checks if it has available gas resources before performing. If there is not enough gas on the account, the transaction will be rejected and the sender’s portfolio will be frozen until more gas is available.
Call connections: how gas limits work
Now consider the example of connections of connection with “A” to another contract or function using the “Chaincall” function. In this case, we will use the language of solidity as an example.
`Solidity
Pragma solidity ^0.8.0;
Example of a contract {
// Function A: A simple function that performs a certain action
function A () public {
(Bool Success) = address (this). Call {Gas: 1000000} (abi.encodewashselector (this.b.selector));
console.log ("successful action");
}
// function B: Another function that requires gas transfer
function b () public {
requires (ether.utils.gaslimit ()> = 1000001, "insufficient gas left on the account");
(Bool Success,) = address (this). Call {Gas: 1500000} (abi.encodewashselector (b.selector));
Console.log ("B performed a successful action");
}
}
In the example above, we have two functions: “Aand" B ". TheAfunction causes another contract or function using the" Chaincall "function with a gas limit of 1 million. EVM checks if he has enough gas before performing.
However, when calling "B EVM, it again checks the available gas and requires at least 1.5 million gas (1000001 + 1500000), which will be transferred from function A. If there is enough gas, the transaction will be rejected.
gas limit in connecting connections
This example shows that the "Gaslimit" parameter is used to enforce a specific gas requirement for each call. In connections with connecting, EVM checks if it has sufficient resources available before continuing each function.
To solve "gaslimit", we must take into account the total gas cost of all connections related to the connection. The formula for calculating the required gas limit in this case is:
Gaslimit = max ((Totalgascost / Gaspercall) + 1, min (Gaslimit, Ceil (log2 (Totalgascost)))
Here is a simplified example:
Solidity
Pragma solidity ^0.8.0;
Example of a contract {
// Total gas cost: 1000001
Uint Totalgascost;
// gas on call to
Uint GasperCall = 1500000;
// EVM stood
Uint Maxgaslimit = 20000000; // free value
function Getrequiredgaslimit () Public View Returns (Uint) {
Totalgascost = 1000001 + GasperCall * 10; // Add a small amount of gas for safety
Return Maxgaslimit - Ceil (Log2 (Totalgascost));
}
}
In this example, we calculate the required gas limit, and items of all connections related to the connection and adding their total gas costs.
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