Interacting with contracts in fixed: Guide

In the world of Ethereum, the introduction of a contract is the basis for construction of decentralized applications (DAP). Although it is common to communicate with these agreements at the Web3 Library, there are cases where we need to pass this restriction and communicate directly with decentralized contracts. In this article, we will look at how to communicate with organized contracts in strength, focusing on direct calls on other contract addresses and keywords.

Direct Calls vs. Web3 Library

Before diving interaction with decentralized contracts, it is important to understand the difference between immediate calls and the Web3 Library's interaction:

* Direct Calls : You can send the message directly to the other address to the Syntaks "ContractDudress" in the strength.

* Example:

`

Callfunction {Agreement

Function MyFunction () Public Returns (Strip of Staff) {

return call ("other agreement", "myfunction");

Iche

Iche

* Web3 Library : Web3 Library offers an interaction interface with Ethereum networks that allow you to make demands and send messages to other contracts.

Interact with Distributed Agreements

Interact with decentralized contracts without using the Web3 Library, you must use the "callcontract" and keywords "callcontract". Here are some examples:

You can call the contract to another address directly by transferring it as an argument to the "callcontract" function:

Strength

// contract a

Pragman solidity ^0.8.0;

Callfunction {Agreement

// Function to interact with other agreement

Function MyFunction () Public Returns (Strip of Staff) {

return call ("other agreement", "myfunction");

Iche

Iche

`

You can also use keyword configurations for direct calls or send messages to other contracts:

Strength

// contract a

Pragman solidity ^0.8.0;

Callfunction {Agreement

// Function to interact with other agreement

Function MyFunction () Public Returns (Strip of Staff) {

// send a message to another agreement

composition

Let msg = mjmpack ("other botract", "myfunction", 0)

Call (0, msg, 0)

Iche

Iche

`

In this example, we use theMJMPACKfunction to pack the message before sending another contract.

Here is an example of how you can communicate with two agreements: in agreement B. in agreement and we define "MyFunction", which returns the value of the series. Then we invite this activity from another agreement with direct calls or keyword composition:

Strength

// contract a

Pragman solidity ^0.8.0;

Callfunction {Agreement

// Function to interact with other agreement

Function MyFunction () Public Returns (Strip of Staff) {

Return "Hello, World!";

Iche

Iche

`

In this example, we call "contract.myfunction ()" directly or use keyword configurations words to send messages to contract B:

Strength

// contract b

Pragman solidity ^0.8.0;

Callfunction {Agreement

// Function to interact with other agreement

Function MyFunction () Public Returns (Strip of Staff) {

Return "Hello, World!";

Iche

Iche

``

In accordance with these instructions and examples, you can now communicate with the decentralized contracts of solid substances without leaning on the Web3 Library.

conclusion

Interaction with decentralized contracts is an integral part of the construction of decentralized applications. Understanding the use of direct calls and pre -made keywords, you can create more complex interaction between contracts, and improve the general understanding of Ethereum programming.

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