This is the last part of the tutorial on how to build an Ether wallet smart contract. You will learn: how to do an ether transfer in Solidity the different unit of Ether (wei, gwei...)

In the previous episode we started an Ether wallet smart contract, and we can now send Ether to another address. However, everybody can call the send() function and steal all the Ether! Not great... In this video you will learn how to implement access control with the revert() built-in Solidity…

In this video, we will start to code a wallet for Ether, using a Solidity smart contract. You will learn how to send money to another address with the transfer() method of an address variable. with the transfer() method of an address variable.

If a user does not exist, no error is produced. We should change that. In this video you will learn how to use the revert() Solidity construct to produce an error.

In the last part of this tutorial we finished all the functionalities of our smart contract. Unfortunately, we have a lot of code duplication in the update and delete function. We use the same for-loop to find a specific entry of our users array. In this video, we will extract…

We are going to continue our CRUD smart contract and finish the main features. You will learn: "Update" and "Destroy" in CRUD Delete an entry of a Solidity array

We will start a CRUD smart contract in Solidity. Crud stands for Create, Read, Update and Delete, and represent a very standard set of data operation that most application needs to do. Once you know these 4 operations, you are well-equipped to develop a large range of smart contracts. In…

In this video, we will build on the previous "Simple storage" smart contract, and store list of data instead of just a single piece of data. You will learn how to: Represent list of data with Solidity arrays Access a specify entry of array Get an array length

In this video, we are going to finish our simple storage smart contract, which can set and get the value of a variable. You will learn: Difference between transaction and calls How to specific calls in Solidity with view / pure keyword Getter functions automatically created by Solidity How the…

In this video we are going to create a smart contract able to store a variable. Very easy to follow! You will learn: how to persist data with state variables in Solidity how to update the value of of a state variable