https://github.com/monte9/helloworld-blockchain
Hello World Dapp in Ethereum with Solidity
https://github.com/monte9/helloworld-blockchain
ethereum smart-contracts solidity truffle
Last synced: about 1 year ago
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Hello World Dapp in Ethereum with Solidity
- Host: GitHub
- URL: https://github.com/monte9/helloworld-blockchain
- Owner: Monte9
- License: mit
- Created: 2017-09-14T07:06:15.000Z (almost 9 years ago)
- Default Branch: master
- Last Pushed: 2017-09-14T19:03:38.000Z (almost 9 years ago)
- Last Synced: 2024-10-27T11:48:32.617Z (over 1 year ago)
- Topics: ethereum, smart-contracts, solidity, truffle
- Language: JavaScript
- Size: 7.81 KB
- Stars: 3
- Watchers: 3
- Forks: 3
- Open Issues: 1
-
Metadata Files:
- Readme: README.md
- License: LICENSE
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README
# HelloWorld-Blockchain
Hello World Dapp in Ethereum with Solidity
## Beginner's Guide
### 1. Write a smart contract
Here's what a simple Hello World smart contract looks like:
```
pragma solidity ^0.4.8;
contract HelloWorld {
uint public balance;
function HelloWorld() {
balance = 1000;
}
}
```
### 2. Compile and deploy
Using `truffle`, we can compile and deploy the smart contract to our local test network using `testrpc`
```truffle compile && truffle migrate --reset```
### 3. Run the contract
Run the following commands on the `truffle console` with `testrpc` running in the background:
```
var helloworld = HelloWorld.deployed()
helloworld.then(a => console.log(a.balance().then(console.log)))
```
**Output:**
```
{ [String: '1000'] s: 1, e: 3, c: [ 1000 ] }
```
In the above output, you can see the balance (of 1000) that we had in our smart contract.
### 4. Next Steps
Build a smart contract that has the ability to read-write the balance in a smart contract.
## Resources:
- [Youtube Video - Introduction to Ethereum Smart Contract Development with Solidity](https://www.youtube.com/watch?v=8jI1TuEaTro)
- [Truffle Getting Started Guide](http://truffleframework.com/docs/getting_started/installation)
- [Testrpc Getting Started Guide](https://github.com/ethereumjs/testrpc#install)