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solidity

A collection of 13 posts

Solidity 0.6.4 and call{value: ...}() instead of call.value()()
solidity

Solidity 0.6.4 and call{value: ...}() instead of call.value()()

Solidity 0.6.4 deprecated something which almost slipped my attention. address.call.value()() was deprecated and got replaced with address.call{value: x}(). Let's check out how this works. When I saw

  • Thomas Wiesner
    Thomas Wiesner
3 min read
Solidity 0.6.0 Breaking Changes Hands-On Video Walk-Through
solidity

Solidity 0.6.0 Breaking Changes Hands-On Video Walk-Through

So, you heard the news: Solidity 0.6.0 is out. And it got some breaking changes! In this post & attached video I want to go through some of the changes hands-on.

  • Thomas Wiesner
    Thomas Wiesner
6 min read
[Video] Ethereum Oracles Walkthrough
ethereum

[Video] Ethereum Oracles Walkthrough

Oracles! What are they? And why do we need them in Ethereum? One of the major benefits that we have on Ethereum is that the Smart Contracts are running on a Sand Box

  • Thomas Wiesner
    Thomas Wiesner
1 min read
[Video] Solidity v0.5.0 Breaking Changes
ethereum

[Video] Solidity v0.5.0 Breaking Changes

Solidity v0.5.0 is out for about 2 weeks and now we can use it in Remix. To read more about the changes made for this version and how you’re going

  • Thomas Wiesner
    Thomas Wiesner
1 min read
[Video] Tutorial how to Upgrade Smart Contracts on Chain
tutorial

[Video] Tutorial how to Upgrade Smart Contracts on Chain

It's not easy to get Upgradeable Smart Contracts right. You should be able to fix bugs or enhance features, obviously. But not at the cost of loosing immutability. It's this element of trust

  • Thomas Wiesner
    Thomas Wiesner
14 min read
Solidity: .call() vs. .delegatecall() vs. Libraries
solidity

Solidity: .call() vs. .delegatecall() vs. Libraries

In this short video we look at the difference between .call() vs. .delegatecall() vs. Libraries in Solidity. Specifically we look at a very simple contract that emits an event with the address of

  • Thomas Wiesner
    Thomas Wiesner
1 min read
solidity

Mappings and Structs in Solidity

In this video we are having a look at Mappings and Structs in Solidity. This is one of 110 video-lectures in the Ethereum Developer Masterclass where you will learn everything there is to

  • Thomas Wiesner
    Thomas Wiesner
1 min read
[Course] Ethereum Beginners Course (free!)
course

[Course] Ethereum Beginners Course (free!)

100% FREE COURSE: Build A Hello World Blockchain App - is the only course you need to begin your journey with Ethereum Blockchain Development incorporating Solidity at a basic level, with step-by-step instructions guiding you through the entire process.

  • Thomas Wiesner
    Thomas Wiesner
1 min read
solidity

Pure vs. View vs. Constant functions

The new Solidity 0.4.16 is out. In this verison the new "view" and "pure" functions are introduced. I had a quick look what this means for you

  • Thomas Wiesner
    Thomas Wiesner
1 min read
[Course] Ethereum Developer Masterclass: Build Real World Projects ($10)
course

[Course] Ethereum Developer Masterclass: Build Real World Projects ($10)

Ethereum Developer Masterclass: Build Real World Projects - is the most complete Ethereum Blockchain Development course online helping you to build complex, real world, ethereum based distributed applications successfully.

  • Thomas Wiesner
    Thomas Wiesner
2 min read
solidity

Exception Handling in Solidity

Since version 0.4.13 we have a new Exception handling in Solidity. Instead of a simple throwwe have now revert(), require() and assert(). In this short video I'll walk you through the

  • Thomas Wiesner
    Thomas Wiesner
1 min read
ethereum

Solidity - .send(...) vs. .transfer(...)

A short notice on the two functions address.send(amount); vs. address.transfer(amount); Since version 0.4.13 (actually since this issue is resolved) Solidity has one new important function, the transfer

  • Thomas Wiesner
    Thomas Wiesner
1 min read
Ethereum Blockchain Developer
course

Ethereum Blockchain Developer

This is one of the largest, most in-depth ethereum development courses online. The curriculum contains a number of practical exercises, which will help you put all the knowledge you’ve learned into practice to create something of value.

  • Thomas Wiesner
    Thomas Wiesner
1 min read
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