javademo

Java demo

Table of contents

• Java demo
  • Table of contents
  • Running (devnet)
    • Prerequisites
    • Steps
  • Running (networks)
    • Prerequisites
    • Steps
    • Note

Running (devnet)

Prerequisites

• starknet-devnet-rs
• asdf version manager with asdf scarb plugin

Steps

1. Install starknet-devnet-rs. Since it has yet to be released, you will need to build it manually:

   git clone https://github.com/0xSpaceShard/starknet-devnet-rs.git starknet-devnet-rs
   cd starknet-devnet-rs
   cargo build --release
   export DEVNET_PATH=$(pwd)/target/release/starknet-devnet

2. Run devnet with specific parameters on your host machine:

   $DEVNET_PATH --host 127.0.0.1 --port 5050 --seed 1053545547

3. Compile a Cairo 1 demo contract. Run:

   cd src/main/resources/contracts
   scarb --release build

4. Run the demo:

   ./gradlew :javademo:run

Running (networks)

Running the demo on a network other than devnet (Mainnet/Testen/Integration) requires some tweaks to be made.

Prerequisites

• URL of a Starknet RPC node.
• Details (address and private key) of an account deployed on said network with some funds on it. If you're using Sepolia testnet, you can obtain some funds from the faucet.
• asdf version manager with asdf scarb plugin

Steps

1. Set a config with your data. To do so, you can modify DemoConfig in Main.java. Make sure to change profile to NETWORK and set the correct values for:
   • RPC node URL
   • account address
   • account private key
2. Make sure to slightly modify the demo contract source code (e.g. add a salt to the function names). Duplicate contracts are not allowed on the same network.
3. Repeat steps 3-4 from Running (devnet).

Note

The time it takes for a transaction to be processed on a network other than devnet can vary. If the demo fails because transaction was not processed in time, try increasing the timeouts in Main.java.