Create and Compile Your First Contract
In order to initialize a new Phat Contract project you can use our hello world template:
git clone https://github.com/Phala-Network/phat-hello
More Phat contract examples can be found in phat-contract-examples and awesome-phat-contracts repositories.
This will create a folder
phat-hello in your work directory.
The folder contains a scaffold
Cargo.toml and a
lib.rs, which both contain the necessary building blocks for using Phat Contract.
lib.rs contains our hello world contract ‒ an ETH balance reader.
In order to build the contract just execute this command in the
cargo contract build
As a result, you’ll get the following files in the
target/ink folder of your contract:
.contract file combines the WASM and metadata into one file and needs to be used when instantiating the contract.
Run Unit Tests Locally
Before you really upload and deploy your contract to the blockchain, you are encouraged to run local unit tests to check its correctness.
phat-hello folder, run
cargo test -- --nocapture
and ensure you see all tests passed.
Do not use
cargo contract testhere,
cargo testwill give you more details if something goes wrong.
-- --nocaptureis optional to see the output during testing.
Now you have successfully compiled and locally test your first Phat Contract. Now it’s time to deploy it to a real blockchain.