67 lines
2.5 KiB
Rust
67 lines
2.5 KiB
Rust
use ethers::{
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abi::{Detokenize, InvalidOutputType, Token},
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contract::Contract,
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providers::HttpProvider,
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signers::MainnetWallet,
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types::Address,
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};
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use anyhow::Result;
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use serde::Serialize;
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use std::convert::TryFrom;
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const ABI: &'static str = r#"[{"inputs":[{"internalType":"string","name":"value","type":"string"}],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"author","type":"address"},{"indexed":false,"internalType":"string","name":"oldValue","type":"string"},{"indexed":false,"internalType":"string","name":"newValue","type":"string"}],"name":"ValueChanged","type":"event"},{"inputs":[],"name":"getValue","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"string","name":"value","type":"string"}],"name":"setValue","outputs":[],"stateMutability":"nonpayable","type":"function"}]"#;
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#[derive(Clone, Debug, Serialize)]
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// TODO: This should be `derive`-able on such types -> similar to how Zexe's Deserialize is done
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struct ValueChanged {
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author: Address,
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old_value: String,
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new_value: String,
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}
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impl Detokenize for ValueChanged {
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fn from_tokens(tokens: Vec<Token>) -> Result<ValueChanged, InvalidOutputType> {
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let author: Address = tokens[0].clone().to_address().unwrap();
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let old_value = tokens[1].clone().to_string().unwrap();
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let new_value = tokens[2].clone().to_string().unwrap();
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Ok(Self {
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author,
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old_value,
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new_value,
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})
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}
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}
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#[tokio::main]
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async fn main() -> Result<()> {
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// connect to the network
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let provider = HttpProvider::try_from("http://localhost:8545")?;
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// create a wallet and connect it to the provider
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let client = "d22cf25d564c3c3f99677f8710b2f045045f16eccd31140c92d6feb18c1169e9"
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.parse::<MainnetWallet>()?
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.connect(&provider);
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// Contract should take both provider or a signer
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// get the contract's address
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let addr = "683BEE23D79A1D8664dF70714edA966e1484Fd3d".parse::<Address>()?;
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// instantiate it
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let contract = Contract::new(&client, serde_json::from_str(ABI)?, addr);
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// call the method
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let _tx_hash = contract.method("setValue", "hi".to_owned())?.send().await?;
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let logs: Vec<ValueChanged> = contract
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.event("ValueChanged")?
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.from_block(0u64)
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.query()
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.await?;
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println!("{}", serde_json::to_string(&logs)?);
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Ok(())
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}
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