ethers-rs/ethers-contract/tests/contract.rs

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use ethers::{contract::ContractFactory, types::H256};
mod common;
pub use common::*;
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#[cfg(not(feature = "celo"))]
mod eth_tests {
use super::*;
use ethers::{
contract::Multicall,
providers::{Http, Provider, StreamExt},
signers::Client,
types::{Address, U256},
utils::Ganache,
};
use std::{convert::TryFrom, sync::Arc};
#[tokio::test]
async fn deploy_and_call_contract() {
let (abi, bytecode) = compile_contract("SimpleStorage", "SimpleStorage.sol");
// launch ganache
let ganache = Ganache::new().spawn();
// Instantiate the clients. We assume that clients consume the provider and the wallet
// (which makes sense), so for multi-client tests, you must clone the provider.
let client = connect(&ganache, 0);
let client2 = connect(&ganache, 1);
// create a factory which will be used to deploy instances of the contract
let factory = ContractFactory::new(abi, bytecode, client.clone());
// `send` consumes the deployer so it must be cloned for later re-use
// (practically it's not expected that you'll need to deploy multiple instances of
// the _same_ deployer, so it's fine to clone here from a dev UX vs perf tradeoff)
let deployer = factory.deploy("initial value".to_string()).unwrap();
let contract = deployer.clone().send().await.unwrap();
let get_value = contract.method::<_, String>("getValue", ()).unwrap();
let last_sender = contract.method::<_, Address>("lastSender", ()).unwrap();
// the initial value must be the one set in the constructor
let value = get_value.clone().call().await.unwrap();
assert_eq!(value, "initial value");
// need to declare the method first, and only then send it
// this is because it internally clones an Arc which would otherwise
// get immediately dropped
let contract_call = contract
.connect(client2.clone())
.method::<_, H256>("setValue", "hi".to_owned())
.unwrap();
let calldata = contract_call.calldata().unwrap();
let gas_estimate = contract_call.estimate_gas().await.unwrap();
let tx_hash = contract_call.send().await.unwrap();
let tx = client.get_transaction(tx_hash).await.unwrap();
let tx_receipt = client.get_transaction_receipt(tx_hash).await.unwrap();
assert_eq!(last_sender.clone().call().await.unwrap(), client2.address());
assert_eq!(get_value.clone().call().await.unwrap(), "hi");
assert_eq!(tx.input, calldata);
assert_eq!(tx_receipt.gas_used.unwrap(), gas_estimate);
// we can also call contract methods at other addresses with the `at` call
// (useful when interacting with multiple ERC20s for example)
let contract2_addr = deployer.send().await.unwrap().address();
let contract2 = contract.at(contract2_addr);
let init_value: String = contract2
.method::<_, String>("getValue", ())
.unwrap()
.call()
.await
.unwrap();
let init_address = contract2
.method::<_, Address>("lastSender", ())
.unwrap()
.call()
.await
.unwrap();
assert_eq!(init_address, Address::zero());
assert_eq!(init_value, "initial value");
// methods with multiple args also work
let _tx_hash = contract
.method::<_, H256>("setValues", ("hi".to_owned(), "bye".to_owned()))
.unwrap()
.send()
.await
.unwrap();
}
#[tokio::test]
async fn get_past_events() {
let (abi, bytecode) = compile_contract("SimpleStorage", "SimpleStorage.sol");
let ganache = Ganache::new().spawn();
let client = connect(&ganache, 0);
let contract = deploy(client.clone(), abi, bytecode).await;
// make a call with `client2`
let _tx_hash = contract
.method::<_, H256>("setValue", "hi".to_owned())
.unwrap()
.send()
.await
.unwrap();
// and we can fetch the events
let logs: Vec<ValueChanged> = contract
.event("ValueChanged")
.unwrap()
.from_block(0u64)
.topic1(client.address()) // Corresponds to the first indexed parameter
.query()
.await
.unwrap();
assert_eq!(logs[0].new_value, "initial value");
assert_eq!(logs[1].new_value, "hi");
assert_eq!(logs.len(), 2);
}
#[tokio::test]
async fn watch_events() {
let (abi, bytecode) = compile_contract("SimpleStorage", "SimpleStorage.sol");
let ganache = Ganache::new().spawn();
let client = connect(&ganache, 0);
let contract = deploy(client, abi, bytecode).await;
// We spawn the event listener:
let mut stream = contract
.event::<ValueChanged>("ValueChanged")
.unwrap()
.stream()
.await
.unwrap();
let num_calls = 3u64;
// and we make a few calls
for i in 0..num_calls {
let tx_hash = contract
.method::<_, H256>("setValue", i.to_string())
.unwrap()
.send()
.await
.unwrap();
let _receipt = contract.pending_transaction(tx_hash).await.unwrap();
}
for i in 0..num_calls {
// unwrap the option of the stream, then unwrap the decoding result
let log = stream.next().await.unwrap().unwrap();
assert_eq!(log.new_value, i.to_string());
}
}
#[tokio::test]
async fn signer_on_node() {
let (abi, bytecode) = compile_contract("SimpleStorage", "SimpleStorage.sol");
// spawn ganache
let ganache = Ganache::new().spawn();
// connect
let provider = Provider::<Http>::try_from(ganache.endpoint())
.unwrap()
.interval(std::time::Duration::from_millis(50u64));
// get the first account
let deployer = provider.get_accounts().await.unwrap()[0];
let client = Arc::new(Client::from(provider).with_sender(deployer));
let contract = deploy(client, abi, bytecode).await;
// make a call without the signer
let tx_hash = contract
.method::<_, H256>("setValue", "hi".to_owned())
.unwrap()
.send()
.await
.unwrap();
let _receipt = contract.pending_transaction(tx_hash).await.unwrap();
let value: String = contract
.method::<_, String>("getValue", ())
.unwrap()
.call()
.await
.unwrap();
assert_eq!(value, "hi");
}
#[tokio::test]
async fn multicall_aggregate() {
// get ABI and bytecode for the Multcall contract
let (multicall_abi, multicall_bytecode) = compile_contract("Multicall", "Multicall.sol");
// get ABI and bytecode for the NotSoSimpleStorage contract
let (not_so_simple_abi, not_so_simple_bytecode) =
compile_contract("NotSoSimpleStorage", "NotSoSimpleStorage.sol");
// get ABI and bytecode for the SimpleStorage contract
let (abi, bytecode) = compile_contract("SimpleStorage", "SimpleStorage.sol");
// launch ganache
let ganache = Ganache::new().spawn();
// Instantiate the clients. We assume that clients consume the provider and the wallet
// (which makes sense), so for multi-client tests, you must clone the provider.
// `client` is used to deploy the Multicall contract
// `client2` is used to deploy the first SimpleStorage contract
// `client3` is used to deploy the second SimpleStorage contract
// `client4` is used to make the aggregate call
let client = connect(&ganache, 0);
let client2 = connect(&ganache, 1);
let client3 = connect(&ganache, 2);
let client4 = connect(&ganache, 3);
// create a factory which will be used to deploy instances of the contract
let multicall_factory =
ContractFactory::new(multicall_abi, multicall_bytecode, client.clone());
let simple_factory = ContractFactory::new(abi.clone(), bytecode.clone(), client2.clone());
let not_so_simple_factory =
ContractFactory::new(not_so_simple_abi, not_so_simple_bytecode, client3.clone());
let multicall_contract = multicall_factory.deploy(()).unwrap().send().await.unwrap();
let addr = multicall_contract.address();
let simple_contract = simple_factory
.deploy("the first one".to_string())
.unwrap()
.send()
.await
.unwrap();
let not_so_simple_contract = not_so_simple_factory
.deploy("the second one".to_string())
.unwrap()
.send()
.await
.unwrap();
// Client2 and Client3 broadcast txs to set the values for both contracts
simple_contract
.connect(client2.clone())
.method::<_, H256>("setValue", "reset first".to_owned())
.unwrap()
.send()
.await
.unwrap();
not_so_simple_contract
.connect(client3.clone())
.method::<_, H256>("setValue", "reset second".to_owned())
.unwrap()
.send()
.await
.unwrap();
// get the calls for `value` and `last_sender` for both SimpleStorage contracts
let value = simple_contract.method::<_, String>("getValue", ()).unwrap();
let value2 = not_so_simple_contract
.method::<_, (String, Address)>("getValues", ())
.unwrap();
let last_sender = simple_contract
.method::<_, Address>("lastSender", ())
.unwrap();
let last_sender2 = not_so_simple_contract
.method::<_, Address>("lastSender", ())
.unwrap();
// initiate the Multicall instance and add calls one by one in builder style
let mut multicall = Multicall::new(client4.clone(), Some(addr)).await.unwrap();
multicall
.add_call(value)
.add_call(value2)
.add_call(last_sender)
.add_call(last_sender2);
let return_data: (String, (String, Address), Address, Address) =
multicall.call().await.unwrap();
assert_eq!(return_data.0, "reset first");
assert_eq!((return_data.1).0, "reset second");
assert_eq!((return_data.1).1, client3.address());
assert_eq!(return_data.2, client2.address());
assert_eq!(return_data.3, client3.address());
// construct broadcast transactions that will be batched and broadcast via Multicall
let broadcast = simple_contract
.connect(client4.clone())
.method::<_, H256>("setValue", "first reset again".to_owned())
.unwrap();
let broadcast2 = not_so_simple_contract
.connect(client4.clone())
.method::<_, H256>("setValue", "second reset again".to_owned())
.unwrap();
// use the already initialised Multicall instance, clearing the previous calls and adding
// new calls. Previously we used the `.call()` functionality to do a batch of calls in one
// go. Now we will use the `.send()` functionality to broadcast a batch of transactions
// in one go
let mut multicall_send = multicall.clone();
multicall_send
.clear_calls()
.add_call(broadcast)
.add_call(broadcast2);
// broadcast the transaction and wait for it to be mined
let tx_hash = multicall_send.send().await.unwrap();
let _tx_receipt = client4.pending_transaction(tx_hash).await.unwrap();
// Do another multicall to check the updated return values
// The `getValue` calls should return the last value we set in the batched broadcast
// The `lastSender` calls should return the address of the Multicall contract, as it is
// the one acting as proxy and calling our SimpleStorage contracts (msg.sender)
let return_data: (String, (String, Address), Address, Address) =
multicall.call().await.unwrap();
assert_eq!(return_data.0, "first reset again");
assert_eq!((return_data.1).0, "second reset again");
assert_eq!((return_data.1).1, multicall_contract.address());
assert_eq!(return_data.2, multicall_contract.address());
assert_eq!(return_data.3, multicall_contract.address());
// query ETH balances of multiple addresses
// these keys haven't been used to do any tx
// so should have 100 ETH
multicall
.clear_calls()
.eth_balance_of(Address::from(&ganache.keys()[4]))
.eth_balance_of(Address::from(&ganache.keys()[5]))
.eth_balance_of(Address::from(&ganache.keys()[6]));
let balances: (U256, U256, U256) = multicall.call().await.unwrap();
assert_eq!(balances.0, U256::from(100000000000000000000u128));
assert_eq!(balances.1, U256::from(100000000000000000000u128));
assert_eq!(balances.2, U256::from(100000000000000000000u128));
}
}
#[cfg(feature = "celo")]
mod celo_tests {
use super::*;
use ethers::{
providers::{Http, Provider},
signers::Wallet,
types::BlockNumber,
};
use std::{convert::TryFrom, sync::Arc, time::Duration};
#[tokio::test]
async fn deploy_and_call_contract() {
let (abi, bytecode) = compile_contract("SimpleStorage", "SimpleStorage.sol");
// Celo testnet
let provider =
Provider::<Http>::try_from("https://alfajores-forno.celo-testnet.org").unwrap();
// Funded with https://celo.org/developers/faucet
let client = "d652abb81e8c686edba621a895531b1f291289b63b5ef09a94f686a5ecdd5db1"
.parse::<Wallet>()
.unwrap()
.connect(provider)
.interval(Duration::from_millis(6000));
let client = Arc::new(client);
let factory = ContractFactory::new(abi, bytecode, client);
let deployer = factory.deploy("initial value".to_string()).unwrap();
let contract = deployer.block(BlockNumber::Pending).send().await.unwrap();
let value: String = contract
.method("getValue", ())
.unwrap()
.call()
.await
.unwrap();
assert_eq!(value, "initial value");
// make a state mutating transaction
let tx_hash = contract
.method::<_, H256>("setValue", "hi".to_owned())
.unwrap()
.send()
.await
.unwrap();
let _receipt = contract.pending_transaction(tx_hash).await.unwrap();
let value: String = contract
.method("getValue", ())
.unwrap()
.call()
.await
.unwrap();
assert_eq!(value, "hi");
}
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}