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Solidity fundamentals articles

If you want to start learning Solidity and smart contracts, check out the following articles. They're a very good start point and you'll get to know the basic principles of the Solidity language and smart contracts structure.

Libraries in Solidity: how to create, use them, and most popular

In this article we'll learn what are libraries in solidity, the difference between using a library or contract inheritance, and review the most popular ones.

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Error handling with throw and revert: differences and gas usage

In this article cover error handling in Solidity using throw, revert and require see the differences in how they consume gas.

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The keccak256 hashing method explained

In this article we explain what is the keccak256 hashing method and show some examples..

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Interact with other contracts using contract Interfaces

In this article we review what are smart contract interfaces in solidity and how to use them to interact with other contracts in the blockchain.

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How to get a smart contract balance

A detailed explanation of how to obtain the balance of a contract from the contract itself and for other contracts

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Generating random numbers in Solidity easily

Here is a quick way to generate semi random numbers in Solidity without using external contracts or an oracle.

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Solidity fundamentals: working with dates and time

Another quick article with everything you need to know about how to handle dates and time in solidity smart contracts

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Solidity fundamentals: require conditional

The require conditional is very common in Solidity as it stops the exeution of a function if a condition is not true.

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Solidity funcions visibility: public, private, internal and external

A detailed guide about functions visibility in Solidity explaining the difference between public and private, and internal and external

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Solidity fundamentals: Global variables (msg, this & block)

Solidity offers a range of global variables that we can access in our smart contracts.These global variables provide information about the blockchain.

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Solidity fundamentals: data location (storage vs memory)

A quick review of the different places where you can store variables in Solidity: storage and memory

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Math operations in Solidity: the basics

A quick guide describing how to do basic mathematical operations in Solidity

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Solidity fundamentals: all about functions

A detailed guide about functions in Solidity explaining how to declare them, return statements, visibility, and types (view and pure)

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Solidity fundamentals: complex data types

Continuation of the previous article about data types, now reviewing complex way to store and handle data using structs, arrays and mappings.

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Solidity fundamentals: basic data types

An introduction to the most basic data types in Solidity: integers, strings, booleans and addresses

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How to import local contracts in Solidity

A step-by-step guide on how to import local contracts in Solidity and how to adapt the deployment script to store their deployment address and make sure they work.

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