74 lines
2.3 KiB
Rust
74 lines
2.3 KiB
Rust
use anyhow::Result;
|
|
use ethers::{
|
|
prelude::*,
|
|
utils::{compile_and_launch_ganache, Ganache, Solc},
|
|
};
|
|
use std::{convert::TryFrom, sync::Arc, time::Duration};
|
|
|
|
// Generate the type-safe contract bindings by providing the ABI
|
|
// definition in human readable format
|
|
abigen!(
|
|
SimpleContract,
|
|
r#"[
|
|
function setValue(string)
|
|
function getValue() external view returns (string)
|
|
event ValueChanged(address indexed author, string oldValue, string newValue)
|
|
]"#,
|
|
event_derives(serde::Deserialize, serde::Serialize)
|
|
);
|
|
|
|
#[tokio::main]
|
|
async fn main() -> Result<()> {
|
|
// 1. compile the contract (note this requires that you are inside the `examples` directory) and launch ganache
|
|
let (compiled, ganache) =
|
|
compile_and_launch_ganache(Solc::new("**/contract.sol"), Ganache::new()).await?;
|
|
let contract = compiled
|
|
.get("SimpleStorage")
|
|
.expect("could not find contract");
|
|
|
|
// 2. instantiate our wallet
|
|
let wallet: LocalWallet = ganache.keys()[0].clone().into();
|
|
|
|
// 3. connect to the network
|
|
let provider =
|
|
Provider::<Http>::try_from(ganache.endpoint())?.interval(Duration::from_millis(10u64));
|
|
|
|
// 4. instantiate the client with the wallet
|
|
let client = SignerMiddleware::new(provider, wallet);
|
|
let client = Arc::new(client);
|
|
|
|
// 5. create a factory which will be used to deploy instances of the contract
|
|
let factory = ContractFactory::new(
|
|
contract.abi.clone(),
|
|
contract.bytecode.clone(),
|
|
client.clone(),
|
|
);
|
|
|
|
// 6. deploy it with the constructor arguments
|
|
let contract = factory.deploy("initial value".to_string())?.send().await?;
|
|
|
|
// 7. get the contract's address
|
|
let addr = contract.address();
|
|
|
|
// 8. instantiate the contract
|
|
let contract = SimpleContract::new(addr, client.clone());
|
|
|
|
// 9. call the `setValue` method
|
|
// (first `await` returns a PendingTransaction, second one waits for it to be mined)
|
|
let _receipt = contract.set_value("hi".to_owned()).send().await?.await?;
|
|
|
|
// 10. get all events
|
|
let logs = contract
|
|
.value_changed_filter()
|
|
.from_block(0u64)
|
|
.query()
|
|
.await?;
|
|
|
|
// 11. get the new value
|
|
let value = contract.get_value().call().await?;
|
|
|
|
println!("Value: {}. Logs: {}", value, serde_json::to_string(&logs)?);
|
|
|
|
Ok(())
|
|
}
|