Truffle DappChain Example
This simple example shows how you can use
Truffle and the Loom Truffle Provider to build a simple Web UI that interacts with the Loom PlasmaChain.
Make sure the following requirements are met and then follow the steps in the next section:
Node >= 8 yarn or npm
First, let's clone this repository. Open a terminal,
cd into the directory where you store your projects, and run the following command:
git clone https://github.com/loomnetwork/truffle-dappchain-example
Run against Loom Testnet
Generate the Loom private key
The following command will download the
loom binary and generate the private key for you:
The Loom private key will be saved into a file called
Deploy to extdev_plasma_us1
As an example, we will deploy and run our application against
Run the following command:
The above command will compile and then deploy our smart contract to
Run this command below to send transactions to the smart contract deployed to
If everything looks good, let's spin up a web server and interact with our smart contract.
Start the web interface
The web interface is built with React and Webpack. Open a new terminal and run the following command:
The web interface is available on http://localhost:8080.
Run against local Loom chain
First, you have to generate a private key using:
Spin up Loom Chain
In a new terminal, run:
Deploy the smart contract
To deploy, run the following command:
You will see something like this:
Starting migrations... ====================== > Network name: 'loom_dapp_chain' > Network id: 13654820909954 > Block gas limit: 0
Network id paste it into a text file. We'll use it later.
src/contract.js file in your text editor of choice and go to line 87.
Now, say your
Network id is
We're ready to start the web server. In a new terminal, run:
In order to correctly redeploy the contracts, there's a command
Also is possible to call truffle command directly with
We're not versioning the build directory for this particular example, although is recommended to versioning, the limitation can be removed by editing the
- Events declared on smart contracts should have an named parameter like
NewValueSet(uint _value)in the contract
SimpleStore.sol. Also, it helps in dealing with events.
BSD 3-Clause License