74 lines
2.7 KiB
Rust
74 lines
2.7 KiB
Rust
use ethers::{
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prelude::*,
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solc::{Project, ProjectPathsConfig},
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utils::Anvil,
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};
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use eyre::Result;
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use std::{convert::TryFrom, path::PathBuf, sync::Arc, time::Duration};
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// Generate the type-safe contract bindings by providing the ABI
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// definition in human readable format
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abigen!(
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SimpleContract,
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r#"[
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function setValue(string)
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function getValue() external view returns (string)
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event ValueChanged(address indexed author, string oldValue, string newValue)
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]"#,
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event_derives(serde::Deserialize, serde::Serialize)
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);
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#[tokio::main]
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async fn main() -> Result<()> {
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// the directory we use is root-dir/examples
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let root = PathBuf::from(env!("CARGO_MANIFEST_DIR")).join("examples");
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// we use `root` for both the project root and for where to search for contracts since
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// everything is in the same directory
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let paths = ProjectPathsConfig::builder().root(&root).sources(&root).build().unwrap();
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// get the solc project instance using the paths above
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let project = Project::builder().paths(paths).ephemeral().no_artifacts().build().unwrap();
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// compile the project and get the artifacts
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let output = project.compile().unwrap();
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let contract = output.find("SimpleStorage").expect("could not find contract").clone();
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let (abi, bytecode, _) = contract.into_parts();
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// 2. instantiate our wallet & anvil
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let anvil = Anvil::new().spawn();
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let wallet: LocalWallet = anvil.keys()[0].clone().into();
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// 3. connect to the network
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let provider =
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Provider::<Http>::try_from(anvil.endpoint())?.interval(Duration::from_millis(10u64));
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// 4. instantiate the client with the wallet
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let client = SignerMiddleware::new(provider, wallet);
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let client = Arc::new(client);
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// 5. create a factory which will be used to deploy instances of the contract
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let factory = ContractFactory::new(abi.unwrap(), bytecode.unwrap(), client.clone());
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// 6. deploy it with the constructor arguments
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let contract = factory.deploy("initial value".to_string())?.send().await?;
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// 7. get the contract's address
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let addr = contract.address();
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// 8. instantiate the contract
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let contract = SimpleContract::new(addr, client.clone());
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// 9. call the `setValue` method
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// (first `await` returns a PendingTransaction, second one waits for it to be mined)
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let _receipt = contract.set_value("hi".to_owned()).send().await?.await?;
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// 10. get all events
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let logs = contract.value_changed_filter().from_block(0u64).query().await?;
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// 11. get the new value
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let value = contract.get_value().call().await?;
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println!("Value: {}. Logs: {}", value, serde_json::to_string(&logs)?);
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Ok(())
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}
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