Implement Multicall functionality for batched calls (#43)
* Implement Multicall functionality for batched calls * Documentation, some modifications as suggested in the review * (Abigen) handle single input arg and set output irrespective of mutability * implement send functionality and allow clearing calls * Fix detokenization, dont require pre-processing anymore * panic when more than supported number of calls are pushed * add doc for panics in case of add_call * (multicall) eth_balance support, update bindings * refactor: move multicall to its own directory * fix: add infura api key * ci: ensure CI runs on PRs from forks * test(multicall): re-use aggregate call * contract: make multicall docs compile and remove redundant clones * ci: add public etherscan API key so that forks don't get rate limited * chore: adjust test contract naming Co-authored-by: Georgios Konstantopoulos <me@gakonst.com>
This commit is contained in:
Rohit Narurkar
GitHub
parent
41998d6d2d
commit
a9bb98b5a7
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@ -1,10 +1,12 @@
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on: push
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on: pull_request
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name: Tests
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# set for fetching ABIs for abigen from etherscan
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# Yeah I know it's bad practice to have API keys, this is a read-only API key
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# so that we do not get rate limited by Etherscan (and it's free to generate as
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# many as you want)
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env:
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ETHERSCAN_API_KEY: ${{ secrets.ETHERSCAN_API_KEY }}
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ETHERSCAN_API_KEY: 76XKCZ4QKZYTJS8PBFUDZ292JBKEKS4974
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jobs:
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tests:
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@ -18,6 +18,7 @@ ethers-signers = { version = "0.1.3", path = "../ethers-signers" }
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ethers-core = { version = "0.1.3", path = "../ethers-core" }
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serde = { version = "1.0.110", default-features = false }
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serde_json = "1.0.55"
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rustc-hex = { version = "2.1.0", default-features = false }
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thiserror = { version = "1.0.15", default-features = false }
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once_cell = { version = "1.3.1", default-features = false }
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@ -40,15 +40,7 @@ fn expand_function(function: &Function, alias: Option<Ident>) -> Result<TokenStr
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let outputs = expand_fn_outputs(&function.outputs)?;
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let is_mutable = matches!(
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function.state_mutability,
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StateMutability::Nonpayable | StateMutability::Payable
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);
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let result = if !is_mutable {
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quote! { ContractCall<P, S, #outputs> }
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} else {
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quote! { ContractCall<P, S, H256> }
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};
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let result = quote! { ContractCall<P, S, #outputs> };
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let arg = expand_inputs_call_arg(&function.inputs);
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let doc = util::expand_doc(&format!(
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@ -85,8 +77,13 @@ pub(crate) fn expand_inputs_call_arg(inputs: &[Param]) -> TokenStream {
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let names = inputs
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.iter()
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.enumerate()
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.map(|(i, param)| util::expand_input_name(i, ¶m.name));
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quote! { ( #( #names ,)* ) }
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.map(|(i, param)| util::expand_input_name(i, ¶m.name))
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.collect::<Vec<TokenStream>>();
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match names.len() {
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0 => quote! { () },
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1 => quote! { #( #names )* },
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_ => quote! { ( #(#names, )* ) },
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}
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}
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fn expand_fn_outputs(outputs: &[Param]) -> Result<TokenStream> {
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@ -113,6 +110,54 @@ mod tests {
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use super::*;
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use ethers_core::abi::ParamType;
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#[test]
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fn test_expand_inputs_call_arg() {
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// no inputs
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let params = vec![];
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let token_stream = expand_inputs_call_arg(¶ms);
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assert_eq!(token_stream.to_string(), "( )");
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// single input
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let params = vec![Param {
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name: "arg_a".to_string(),
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kind: ParamType::Address,
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}];
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let token_stream = expand_inputs_call_arg(¶ms);
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assert_eq!(token_stream.to_string(), "arg_a");
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// two inputs
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let params = vec![
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Param {
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name: "arg_a".to_string(),
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kind: ParamType::Address,
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},
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Param {
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name: "arg_b".to_string(),
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kind: ParamType::Uint(256usize),
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},
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];
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let token_stream = expand_inputs_call_arg(¶ms);
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assert_eq!(token_stream.to_string(), "( arg_a , arg_b , )");
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// three inputs
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let params = vec![
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Param {
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name: "arg_a".to_string(),
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kind: ParamType::Address,
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},
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Param {
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name: "arg_b".to_string(),
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kind: ParamType::Uint(128usize),
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},
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Param {
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name: "arg_c".to_string(),
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kind: ParamType::Bool,
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},
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];
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let token_stream = expand_inputs_call_arg(¶ms);
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assert_eq!(token_stream.to_string(), "( arg_a , arg_b , arg_c , )");
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}
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#[test]
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fn expand_inputs_empty() {
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assert_quote!(expand_inputs(&[]).unwrap().to_string(), {},);
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@ -157,7 +202,7 @@ mod tests {
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}
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#[test]
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fn expand_fn_outputs_muliple() {
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fn expand_fn_outputs_multiple() {
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assert_quote!(
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expand_fn_outputs(&[
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Param {
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@ -24,6 +24,9 @@ pub use factory::ContractFactory;
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mod event;
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mod multicall;
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pub use multicall::Multicall;
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/// This module exposes low lever builder structures which are only consumed by the
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/// type-safe ABI bindings generators.
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pub mod builders {
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@ -0,0 +1,379 @@
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use ethers_core::{
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abi::{Detokenize, Function, Token},
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types::{Address, BlockNumber, NameOrAddress, TxHash, U256},
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};
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use ethers_providers::JsonRpcClient;
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use ethers_signers::{Client, Signer};
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use std::{collections::HashMap, str::FromStr, sync::Arc};
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use crate::{
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call::{ContractCall, ContractError},
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Lazy,
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};
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mod multicall_contract;
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use multicall_contract::MulticallContract;
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/// A lazily computed hash map with the Ethereum network IDs as keys and the corresponding
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/// Multicall smart contract addresses as values
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pub static ADDRESS_BOOK: Lazy<HashMap<U256, Address>> = Lazy::new(|| {
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let mut m = HashMap::new();
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// mainnet
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let addr =
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Address::from_str("eefba1e63905ef1d7acba5a8513c70307c1ce441").expect("Decoding failed");
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m.insert(U256::from(1u8), addr);
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// rinkeby
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let addr =
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Address::from_str("42ad527de7d4e9d9d011ac45b31d8551f8fe9821").expect("Decoding failed");
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m.insert(U256::from(4u8), addr);
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// goerli
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let addr =
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Address::from_str("77dca2c955b15e9de4dbbcf1246b4b85b651e50e").expect("Decoding failed");
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m.insert(U256::from(5u8), addr);
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// kovan
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let addr =
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Address::from_str("2cc8688c5f75e365aaeeb4ea8d6a480405a48d2a").expect("Decoding failed");
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m.insert(U256::from(42u8), addr);
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m
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});
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/// A Multicall is an abstraction for sending batched calls/transactions to the Ethereum blockchain.
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/// It stores an instance of the [`Multicall` smart contract](https://etherscan.io/address/0xeefba1e63905ef1d7acba5a8513c70307c1ce441#code)
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/// and the user provided list of transactions to be made.
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///
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/// `Multicall` can instantiate the Multicall contract instance from the chain ID of the client
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/// supplied to [`new`]. It supports the Ethereum mainnet, as well as testnets
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/// [Rinkeby](https://rinkeby.etherscan.io/address/0x42ad527de7d4e9d9d011ac45b31d8551f8fe9821#code),
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/// [Goerli](https://goerli.etherscan.io/address/0x77dca2c955b15e9de4dbbcf1246b4b85b651e50e) and
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/// [Kovan](https://kovan.etherscan.io/address/0x2cc8688c5f75e365aaeeb4ea8d6a480405a48d2a#code).
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///
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/// Additionally, the `block` number can be provided for the call by using the [`block`] method.
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/// Build on the `Multicall` instance by adding calls using the [`add_call`] method.
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///
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/// # Example
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///
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/// ```no_run
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/// use ethers::{
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/// abi::Abi,
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/// contract::{Contract, Multicall},
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/// providers::{Http, Provider},
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/// signers::{Client, Wallet},
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/// types::{Address, H256, U256},
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/// };
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/// use std::{convert::TryFrom, sync::Arc};
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///
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/// # async fn bar() -> Result<(), Box<dyn std::error::Error>> {
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/// // this is a dummy address used for illustration purpose
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/// let address = "eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee".parse::<Address>()?;
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///
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/// // (ugly way to write the ABI inline, you can otherwise read it from a file)
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/// let abi: Abi = serde_json::from_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":true,"internalType":"address","name":"oldAuthor","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":[],"name":"lastSender","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"string","name":"value","type":"string"}],"name":"setValue","outputs":[],"stateMutability":"nonpayable","type":"function"}]"#)?;
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///
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/// // connect to the network
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/// let provider = Provider::<Http>::try_from("https://kovan.infura.io/v3/c60b0bb42f8a4c6481ecd229eddaca27")?;
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/// let client = "380eb0f3d505f087e438eca80bc4df9a7faa24f868e69fc0440261a0fc0567dc"
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/// .parse::<Wallet>()?.connect(provider);
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///
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/// // create the contract object. This will be used to construct the calls for multicall
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/// let contract = Contract::new(address, abi, client.clone());
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///
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/// // note that these [`ContractCall`]s are futures, and need to be `.await`ed to resolve.
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/// // But we will let `Multicall` to take care of that for us
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/// let first_call = contract.method::<_, String>("getValue", ())?;
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/// let second_call = contract.method::<_, Address>("lastSender", ())?;
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///
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/// // since this example connects to the Kovan testnet, we need not provide an address for
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/// // the Multicall contract and we set that to `None`. If you wish to provide the address
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/// // for the Multicall contract, you can pass the `Some(multicall_addr)` argument.
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/// // Construction of the `Multicall` instance follows the builder pattern
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/// let multicall = Multicall::new(client.clone(), None)
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/// .await?
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/// .add_call(first_call)
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/// .add_call(second_call);
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///
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/// // `await`ing on the `call` method lets us fetch the return values of both the above calls
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/// // in one single RPC call
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/// let _return_data: (String, Address) = multicall.call().await?;
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///
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/// // the same `Multicall` instance can be re-used to do a different batch of transactions.
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/// // Say we wish to broadcast (send) a couple of transactions via the Multicall contract.
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/// let first_broadcast = contract.method::<_, H256>("setValue", "some value".to_owned())?;
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/// let second_broadcast = contract.method::<_, H256>("setValue", "new value".to_owned())?;
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/// let multicall = multicall
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/// .clear_calls()
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/// .add_call(first_broadcast)
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/// .add_call(second_broadcast);
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///
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/// // `await`ing the `send` method waits for the transaction to be broadcast, which also
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/// // returns the transaction hash
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/// let tx_hash = multicall.send().await?;
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/// let _tx_receipt = client.provider().pending_transaction(tx_hash).await?;
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///
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/// // you can also query ETH balances of multiple addresses
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/// let address_1 = "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa".parse::<Address>()?;
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/// let address_2 = "ffffffffffffffffffffffffffffffffffffffff".parse::<Address>()?;
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/// let multicall = multicall
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/// .clear_calls()
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/// .eth_balance_of(address_1)
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/// .eth_balance_of(address_2);
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/// let _balances: (U256, U256) = multicall.call().await?;
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/// # Ok(())
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/// # }
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/// ```
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///
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/// [`new`]: method@crate::Multicall::new
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/// [`block`]: method@crate::Multicall::block
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/// [`add_call`]: methond@crate::Multicall::add_call
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#[derive(Clone)]
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pub struct Multicall<P, S> {
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calls: Vec<Call>,
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block: Option<BlockNumber>,
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contract: MulticallContract<P, S>,
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}
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#[derive(Clone)]
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/// Helper struct for managing calls to be made to the `function` in smart contract `target`
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/// with `data`
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pub struct Call {
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target: Address,
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data: Vec<u8>,
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function: Function,
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}
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impl<P, S> Multicall<P, S>
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where
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P: JsonRpcClient,
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S: Signer,
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{
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/// Creates a new Multicall instance from the provided client. If provided with an `address`,
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/// it instantiates the Multicall contract with that address. Otherwise it fetches the address
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/// from the address book.
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///
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/// # Panics
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/// If a `None` address is provided, and the provided client also does not belong to one of
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/// the supported network IDs (mainnet, kovan, rinkeby and goerli)
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pub async fn new<C: Into<Arc<Client<P, S>>>>(
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client: C,
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address: Option<Address>,
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) -> Result<Self, ContractError> {
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let client = client.into();
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// Fetch chain id and the corresponding address of Multicall contract
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// preference is given to Multicall contract's address if provided
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// otherwise check the address book for the client's chain ID
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let address: Address = match address {
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Some(addr) => addr,
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None => {
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let chain_id = client.get_chainid().await?;
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match ADDRESS_BOOK.get(&chain_id) {
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Some(addr) => *addr,
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None => panic!(
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"Must either be a supported Network ID or provide Multicall contract address"
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),
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}
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}
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};
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// Instantiate the multicall contract
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let contract = MulticallContract::new(address, client);
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Ok(Self {
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calls: vec![],
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block: None,
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contract,
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})
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}
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/// Sets the `block` field for the multicall aggregate call
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pub fn block<T: Into<BlockNumber>>(mut self, block: T) -> Self {
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self.block = Some(block.into());
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self
|
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}
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/// Appends a `call` to the list of calls for the Multicall instance
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///
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/// # Panics
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///
|
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/// If more than the maximum number of supported calls are added. The maximum
|
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/// limits is constrained due to tokenization/detokenization support for tuples
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pub fn add_call<D: Detokenize>(mut self, call: ContractCall<P, S, D>) -> Self {
|
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if self.calls.len() >= 16 {
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panic!("Cannot support more than {} calls", 16);
|
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}
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|
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match (call.tx.to, call.tx.data) {
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(Some(NameOrAddress::Address(target)), Some(data)) => {
|
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let call = Call {
|
||||
target,
|
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data: data.0,
|
||||
function: call.function,
|
||||
};
|
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self.calls.push(call);
|
||||
self
|
||||
}
|
||||
_ => self,
|
||||
}
|
||||
}
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||||
|
||||
/// Appends a `call` to the list of calls for the Multicall instance for querying
|
||||
/// the ETH balance of an address
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///
|
||||
/// # Panics
|
||||
///
|
||||
/// If more than the maximum number of supported calls are added. The maximum
|
||||
/// limits is constrained due to tokenization/detokenization support for tuples
|
||||
pub fn eth_balance_of(self, addr: Address) -> Self {
|
||||
let call = self.contract.get_eth_balance(addr);
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||||
self.add_call(call)
|
||||
}
|
||||
|
||||
/// Clear the batch of calls from the Multicall instance. Re-use the already instantiated
|
||||
/// Multicall, to send a different batch of transactions or do another aggregate query
|
||||
///
|
||||
/// ```no_run
|
||||
/// # async fn foo() -> Result<(), Box<dyn std::error::Error>> {
|
||||
/// # use ethers::prelude::*;
|
||||
/// # use std::{sync::Arc, convert::TryFrom};
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/// #
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||||
/// # let provider = Provider::<Http>::try_from("http://localhost:8545")?;
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/// # let client = "380eb0f3d505f087e438eca80bc4df9a7faa24f868e69fc0440261a0fc0567dc"
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||||
/// # .parse::<Wallet>()?.connect(provider);
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/// # let client = Arc::new(client);
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/// #
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||||
/// # let abi = serde_json::from_str("")?;
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/// # let address = "eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee".parse::<Address>()?;
|
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/// # let contract = Contract::new(address, abi, client.clone());
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/// #
|
||||
/// # let broadcast_1 = contract.method::<_, H256>("setValue", "some value".to_owned())?;
|
||||
/// # let broadcast_2 = contract.method::<_, H256>("setValue", "new value".to_owned())?;
|
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/// #
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/// let multicall = Multicall::new(client, None)
|
||||
/// .await?
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||||
/// .add_call(broadcast_1)
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||||
/// .add_call(broadcast_2);
|
||||
///
|
||||
/// let _tx_hash = multicall.send().await?;
|
||||
///
|
||||
/// # let call_1 = contract.method::<_, String>("getValue", ())?;
|
||||
/// # let call_2 = contract.method::<_, Address>("lastSender", ())?;
|
||||
/// let multicall = multicall
|
||||
/// .clear_calls()
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||||
/// .add_call(call_1)
|
||||
/// .add_call(call_2);
|
||||
/// let return_data: (String, Address) = multicall.call().await?;
|
||||
/// # Ok(())
|
||||
/// # }
|
||||
/// ```
|
||||
pub fn clear_calls(mut self) -> Self {
|
||||
self.calls.clear();
|
||||
self
|
||||
}
|
||||
|
||||
/// Queries the Ethereum blockchain via an `eth_call`, but via the Multicall contract.
|
||||
///
|
||||
/// It returns a [`ContractError`] if there is any error in the RPC call or while
|
||||
/// detokenizing the tokens back to the expected return type. The return type must be
|
||||
/// annonated while calling this method.
|
||||
///
|
||||
/// ```no_run
|
||||
/// # async fn foo() -> Result<(), Box<dyn std::error::Error>> {
|
||||
/// # use ethers::prelude::*;
|
||||
/// # use std::convert::TryFrom;
|
||||
/// #
|
||||
/// # let provider = Provider::<Http>::try_from("http://localhost:8545")?;
|
||||
/// # let client = "380eb0f3d505f087e438eca80bc4df9a7faa24f868e69fc0440261a0fc0567dc"
|
||||
/// # .parse::<Wallet>()?.connect(provider);
|
||||
/// #
|
||||
/// # let multicall = Multicall::new(client, None).await?;
|
||||
/// // If the Solidity function calls has the following return types:
|
||||
/// // 1. `returns (uint256)`
|
||||
/// // 2. `returns (string, address)`
|
||||
/// // 3. `returns (bool)`
|
||||
/// let result: (U256, (String, Address), bool) = multicall.call().await?;
|
||||
/// # Ok(())
|
||||
/// # }
|
||||
/// ```
|
||||
///
|
||||
/// Note: this method _does not_ send a transaction from your account
|
||||
///
|
||||
/// [`ContractError`]: crate::ContractError
|
||||
pub async fn call<D: Detokenize>(&self) -> Result<D, ContractError> {
|
||||
let contract_call = self.as_contract_call();
|
||||
|
||||
// Fetch response from the Multicall contract
|
||||
let (_block_number, return_data) = contract_call.call().await?;
|
||||
|
||||
// Decode return data into ABI tokens
|
||||
let tokens = self
|
||||
.calls
|
||||
.iter()
|
||||
.zip(&return_data)
|
||||
.map(|(call, bytes)| {
|
||||
let tokens: Vec<Token> = call.function.decode_output(&bytes)?;
|
||||
|
||||
Ok(match tokens.len() {
|
||||
0 => Token::Tuple(vec![]),
|
||||
1 => tokens[0].clone(),
|
||||
_ => Token::Tuple(tokens),
|
||||
})
|
||||
})
|
||||
.collect::<Result<Vec<Token>, ContractError>>()?;
|
||||
|
||||
// Form tokens that represent tuples
|
||||
let tokens = vec![Token::Tuple(tokens)];
|
||||
|
||||
// Detokenize from the tokens into the provided tuple D
|
||||
let data = D::from_tokens(tokens)?;
|
||||
|
||||
Ok(data)
|
||||
}
|
||||
|
||||
/// Signs and broadcasts a batch of transactions by using the Multicall contract as proxy.
|
||||
///
|
||||
/// ```no_run
|
||||
/// # async fn foo() -> Result<(), Box<dyn std::error::Error>> {
|
||||
/// # use ethers::prelude::*;
|
||||
/// # use std::convert::TryFrom;
|
||||
/// # let provider = Provider::<Http>::try_from("http://localhost:8545")?;
|
||||
/// # let client = "380eb0f3d505f087e438eca80bc4df9a7faa24f868e69fc0440261a0fc0567dc"
|
||||
/// # .parse::<Wallet>()?.connect(provider);
|
||||
/// # let multicall = Multicall::new(client, None).await?;
|
||||
/// let tx_hash = multicall.send().await?;
|
||||
/// # Ok(())
|
||||
/// # }
|
||||
/// ```
|
||||
///
|
||||
/// Note: this method sends a transaction from your account, and will return an error
|
||||
/// if you do not have sufficient funds to pay for gas
|
||||
pub async fn send(&self) -> Result<TxHash, ContractError> {
|
||||
let contract_call = self.as_contract_call();
|
||||
|
||||
// Broadcast transaction and return the transaction hash
|
||||
let tx_hash = contract_call.send().await?;
|
||||
|
||||
Ok(tx_hash)
|
||||
}
|
||||
|
||||
fn as_contract_call(&self) -> ContractCall<P, S, (U256, Vec<Vec<u8>>)> {
|
||||
// Map the Multicall struct into appropriate types for `aggregate` function
|
||||
let calls: Vec<(Address, Vec<u8>)> = self
|
||||
.calls
|
||||
.iter()
|
||||
.map(|call| (call.target, call.data.clone()))
|
||||
.collect();
|
||||
|
||||
// Construct the ContractCall for `aggregate` function to broadcast the transaction
|
||||
let contract_call = self.contract.aggregate(calls);
|
||||
if let Some(block) = self.block {
|
||||
contract_call.block(block)
|
||||
} else {
|
||||
contract_call
|
||||
}
|
||||
}
|
||||
}
|
||||
|
|
@ -0,0 +1,96 @@
|
|||
pub use multicallcontract_mod::*;
|
||||
mod multicallcontract_mod {
|
||||
#![allow(dead_code)]
|
||||
#![allow(unused_imports)]
|
||||
use crate::{
|
||||
builders::{ContractCall, Event},
|
||||
Contract, Lazy,
|
||||
};
|
||||
use ethers_core::{
|
||||
abi::{Abi, Detokenize, InvalidOutputType, Token, Tokenizable},
|
||||
types::*,
|
||||
};
|
||||
use ethers_providers::JsonRpcClient;
|
||||
use ethers_signers::{Client, Signer};
|
||||
#[doc = "MulticallContract was auto-generated with ethers-rs Abigen. More information at: https://github.com/gakonst/ethers-rs"]
|
||||
use std::sync::Arc;
|
||||
pub static MULTICALLCONTRACT_ABI: Lazy<Abi> = Lazy::new(|| {
|
||||
serde_json :: from_str ( "[{\"inputs\":[{\"components\":[{\"internalType\":\"address\",\"name\":\"target\",\"type\":\"address\"},{\"internalType\":\"bytes\",\"name\":\"callData\",\"type\":\"bytes\"}],\"internalType\":\"struct MulticallContract.Call[]\",\"name\":\"calls\",\"type\":\"tuple[]\"}],\"name\":\"aggregate\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"blockNumber\",\"type\":\"uint256\"},{\"internalType\":\"bytes[]\",\"name\":\"returnData\",\"type\":\"bytes[]\"}],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"uint256\",\"name\":\"blockNumber\",\"type\":\"uint256\"}],\"name\":\"getBlockHash\",\"outputs\":[{\"internalType\":\"bytes32\",\"name\":\"blockHash\",\"type\":\"bytes32\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"getCurrentBlockCoinbase\",\"outputs\":[{\"internalType\":\"address\",\"name\":\"coinbase\",\"type\":\"address\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"getCurrentBlockDifficulty\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"difficulty\",\"type\":\"uint256\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"getCurrentBlockGasLimit\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"gaslimit\",\"type\":\"uint256\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"getCurrentBlockTimestamp\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"timestamp\",\"type\":\"uint256\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"addr\",\"type\":\"address\"}],\"name\":\"getEthBalance\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"balance\",\"type\":\"uint256\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"getLastBlockHash\",\"outputs\":[{\"internalType\":\"bytes32\",\"name\":\"blockHash\",\"type\":\"bytes32\"}],\"stateMutability\":\"view\",\"type\":\"function\"}]" ) . expect ( "invalid abi" )
|
||||
});
|
||||
#[derive(Clone)]
|
||||
pub struct MulticallContract<P, S>(Contract<P, S>);
|
||||
impl<P, S> std::ops::Deref for MulticallContract<P, S> {
|
||||
type Target = Contract<P, S>;
|
||||
fn deref(&self) -> &Self::Target {
|
||||
&self.0
|
||||
}
|
||||
}
|
||||
impl<P: JsonRpcClient, S: Signer> std::fmt::Debug for MulticallContract<P, S> {
|
||||
fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
|
||||
f.debug_tuple(stringify!(MulticallContract))
|
||||
.field(&self.address())
|
||||
.finish()
|
||||
}
|
||||
}
|
||||
impl<'a, P: JsonRpcClient, S: Signer> MulticallContract<P, S> {
|
||||
#[doc = r" Creates a new contract instance with the specified `ethers`"]
|
||||
#[doc = r" client at the given `Address`. The contract derefs to a `ethers::Contract`"]
|
||||
#[doc = r" object"]
|
||||
pub fn new<T: Into<Address>, C: Into<Arc<Client<P, S>>>>(address: T, client: C) -> Self {
|
||||
let contract =
|
||||
Contract::new(address.into(), MULTICALLCONTRACT_ABI.clone(), client.into());
|
||||
Self(contract)
|
||||
}
|
||||
#[doc = "Calls the contract's `aggregate` (0x252dba42) function"]
|
||||
pub fn aggregate(
|
||||
&self,
|
||||
calls: Vec<(Address, Vec<u8>)>,
|
||||
) -> ContractCall<P, S, (U256, Vec<Vec<u8>>)> {
|
||||
self.0
|
||||
.method_hash([37, 45, 186, 66], calls)
|
||||
.expect("method not found (this should never happen)")
|
||||
}
|
||||
#[doc = "Calls the contract's `getCurrentBlockDifficulty` (0x72425d9d) function"]
|
||||
pub fn get_current_block_difficulty(&self) -> ContractCall<P, S, U256> {
|
||||
self.0
|
||||
.method_hash([114, 66, 93, 157], ())
|
||||
.expect("method not found (this should never happen)")
|
||||
}
|
||||
#[doc = "Calls the contract's `getCurrentBlockGasLimit` (0x86d516e8) function"]
|
||||
pub fn get_current_block_gas_limit(&self) -> ContractCall<P, S, U256> {
|
||||
self.0
|
||||
.method_hash([134, 213, 22, 232], ())
|
||||
.expect("method not found (this should never happen)")
|
||||
}
|
||||
#[doc = "Calls the contract's `getCurrentBlockTimestamp` (0x0f28c97d) function"]
|
||||
pub fn get_current_block_timestamp(&self) -> ContractCall<P, S, U256> {
|
||||
self.0
|
||||
.method_hash([15, 40, 201, 125], ())
|
||||
.expect("method not found (this should never happen)")
|
||||
}
|
||||
#[doc = "Calls the contract's `getCurrentBlockCoinbase` (0xa8b0574e) function"]
|
||||
pub fn get_current_block_coinbase(&self) -> ContractCall<P, S, Address> {
|
||||
self.0
|
||||
.method_hash([168, 176, 87, 78], ())
|
||||
.expect("method not found (this should never happen)")
|
||||
}
|
||||
#[doc = "Calls the contract's `getBlockHash` (0xee82ac5e) function"]
|
||||
pub fn get_block_hash(&self, block_number: U256) -> ContractCall<P, S, [u8; 32]> {
|
||||
self.0
|
||||
.method_hash([238, 130, 172, 94], block_number)
|
||||
.expect("method not found (this should never happen)")
|
||||
}
|
||||
#[doc = "Calls the contract's `getEthBalance` (0x4d2301cc) function"]
|
||||
pub fn get_eth_balance(&self, addr: Address) -> ContractCall<P, S, U256> {
|
||||
self.0
|
||||
.method_hash([77, 35, 1, 204], addr)
|
||||
.expect("method not found (this should never happen)")
|
||||
}
|
||||
#[doc = "Calls the contract's `getLastBlockHash` (0x27e86d6e) function"]
|
||||
pub fn get_last_block_hash(&self) -> ContractCall<P, S, [u8; 32]> {
|
||||
self.0
|
||||
.method_hash([39, 232, 109, 110], ())
|
||||
.expect("method not found (this should never happen)")
|
||||
}
|
||||
}
|
||||
}
|
||||
|
|
@ -34,12 +34,12 @@ impl Detokenize for ValueChanged {
|
|||
}
|
||||
}
|
||||
|
||||
/// compiles the test contract
|
||||
pub fn compile() -> (Abi, Bytes) {
|
||||
let compiled = Solc::new("./tests/contract.sol").build().unwrap();
|
||||
let contract = compiled
|
||||
.get("SimpleStorage")
|
||||
.expect("could not find contract");
|
||||
/// compiles the given contract and returns the ABI and Bytecode
|
||||
pub fn compile_contract(name: &str, filename: &str) -> (Abi, Bytes) {
|
||||
let compiled = Solc::new(&format!("./tests/solidity-contracts/{}", filename))
|
||||
.build()
|
||||
.unwrap();
|
||||
let contract = compiled.get(name).expect("could not find contract");
|
||||
(contract.abi.clone(), contract.bytecode.clone())
|
||||
}
|
||||
|
||||
|
|
|
|||
|
|
@ -7,16 +7,17 @@ pub use common::*;
|
|||
mod eth_tests {
|
||||
use super::*;
|
||||
use ethers::{
|
||||
contract::Multicall,
|
||||
providers::{Http, Provider, StreamExt},
|
||||
signers::Client,
|
||||
types::Address,
|
||||
types::{Address, U256},
|
||||
utils::Ganache,
|
||||
};
|
||||
use std::{convert::TryFrom, sync::Arc};
|
||||
|
||||
#[tokio::test]
|
||||
async fn deploy_and_call_contract() {
|
||||
let (abi, bytecode) = compile();
|
||||
let (abi, bytecode) = compile_contract("SimpleStorage", "SimpleStorage.sol");
|
||||
|
||||
// launch ganache
|
||||
let ganache = Ganache::new().spawn();
|
||||
|
|
@ -85,7 +86,7 @@ mod eth_tests {
|
|||
|
||||
#[tokio::test]
|
||||
async fn get_past_events() {
|
||||
let (abi, bytecode) = compile();
|
||||
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;
|
||||
|
|
@ -114,7 +115,7 @@ mod eth_tests {
|
|||
|
||||
#[tokio::test]
|
||||
async fn watch_events() {
|
||||
let (abi, bytecode) = compile();
|
||||
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;
|
||||
|
|
@ -149,7 +150,7 @@ mod eth_tests {
|
|||
|
||||
#[tokio::test]
|
||||
async fn signer_on_node() {
|
||||
let (abi, bytecode) = compile();
|
||||
let (abi, bytecode) = compile_contract("SimpleStorage", "SimpleStorage.sol");
|
||||
// spawn ganache
|
||||
let ganache = Ganache::new().spawn();
|
||||
|
||||
|
|
@ -180,6 +181,152 @@ mod eth_tests {
|
|||
.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 multicall = Multicall::new(client4.clone(), Some(addr))
|
||||
.await
|
||||
.unwrap()
|
||||
.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 multicall_send = multicall
|
||||
.clone()
|
||||
.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
|
||||
let multicall = 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")]
|
||||
|
|
@ -194,7 +341,7 @@ mod celo_tests {
|
|||
|
||||
#[tokio::test]
|
||||
async fn deploy_and_call_contract() {
|
||||
let (abi, bytecode) = compile();
|
||||
let (abi, bytecode) = compile_contract("SimpleStorage", "SimpleStorage.sol");
|
||||
|
||||
// Celo testnet
|
||||
let provider =
|
||||
|
|
|
|||
|
|
@ -0,0 +1,45 @@
|
|||
pragma solidity >=0.5.0;
|
||||
pragma experimental ABIEncoderV2;
|
||||
|
||||
/// @title Multicall - Aggregate results from multiple read-only function calls
|
||||
/// @author Michael Elliot <mike@makerdao.com>
|
||||
/// @author Joshua Levine <joshua@makerdao.com>
|
||||
/// @author Nick Johnson <arachnid@notdot.net>
|
||||
|
||||
contract Multicall {
|
||||
struct Call {
|
||||
address target;
|
||||
bytes callData;
|
||||
}
|
||||
function aggregate(Call[] memory calls) public returns (uint256 blockNumber, bytes[] memory returnData) {
|
||||
blockNumber = block.number;
|
||||
returnData = new bytes[](calls.length);
|
||||
for(uint256 i = 0; i < calls.length; i++) {
|
||||
(bool success, bytes memory ret) = calls[i].target.call(calls[i].callData);
|
||||
require(success);
|
||||
returnData[i] = ret;
|
||||
}
|
||||
}
|
||||
// Helper functions
|
||||
function getEthBalance(address addr) public view returns (uint256 balance) {
|
||||
balance = addr.balance;
|
||||
}
|
||||
function getBlockHash(uint256 blockNumber) public view returns (bytes32 blockHash) {
|
||||
blockHash = blockhash(blockNumber);
|
||||
}
|
||||
function getLastBlockHash() public view returns (bytes32 blockHash) {
|
||||
blockHash = blockhash(block.number - 1);
|
||||
}
|
||||
function getCurrentBlockTimestamp() public view returns (uint256 timestamp) {
|
||||
timestamp = block.timestamp;
|
||||
}
|
||||
function getCurrentBlockDifficulty() public view returns (uint256 difficulty) {
|
||||
difficulty = block.difficulty;
|
||||
}
|
||||
function getCurrentBlockGasLimit() public view returns (uint256 gaslimit) {
|
||||
gaslimit = block.gaslimit;
|
||||
}
|
||||
function getCurrentBlockCoinbase() public view returns (address coinbase) {
|
||||
coinbase = block.coinbase;
|
||||
}
|
||||
}
|
||||
|
|
@ -0,0 +1,28 @@
|
|||
pragma solidity >=0.4.24;
|
||||
|
||||
contract NotSoSimpleStorage {
|
||||
|
||||
event ValueChanged(address indexed author, address indexed oldAuthor, string oldValue, string newValue);
|
||||
|
||||
address public lastSender;
|
||||
string _value;
|
||||
|
||||
constructor(string memory value) public {
|
||||
emit ValueChanged(msg.sender, address(0), _value, value);
|
||||
_value = value;
|
||||
}
|
||||
|
||||
function getValue() view public returns (string memory) {
|
||||
return _value;
|
||||
}
|
||||
|
||||
function getValues() view public returns (string memory, address) {
|
||||
return (_value, lastSender);
|
||||
}
|
||||
|
||||
function setValue(string memory value) public {
|
||||
emit ValueChanged(msg.sender, lastSender, _value, value);
|
||||
_value = value;
|
||||
lastSender = msg.sender;
|
||||
}
|
||||
}
|
||||
|
|
@ -566,4 +566,41 @@ mod tests {
|
|||
assert_eq!((-4i64).into_token(), Token::Int(U256::MAX - 3));
|
||||
assert_eq!((-5i128).into_token(), Token::Int(U256::MAX - 4));
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn should_detokenize() {
|
||||
// handle tuple of one element
|
||||
let tokens = vec![Token::FixedBytes(vec![1, 2, 3, 4]), Token::Bool(true)];
|
||||
let tokens = vec![Token::Tuple(tokens)];
|
||||
let data: ([u8; 4], bool) = Detokenize::from_tokens(tokens).unwrap();
|
||||
assert_eq!(data.0[0], 1);
|
||||
assert_eq!(data.0[1], 2);
|
||||
assert_eq!(data.0[2], 3);
|
||||
assert_eq!(data.0[3], 4);
|
||||
assert_eq!(data.1, true);
|
||||
|
||||
// handle vector of more than one elements
|
||||
let tokens = vec![Token::Bool(false), Token::Uint(U256::from(13u8))];
|
||||
let data: (bool, u8) = Detokenize::from_tokens(tokens).unwrap();
|
||||
assert_eq!(data.0, false);
|
||||
assert_eq!(data.1, 13u8);
|
||||
|
||||
// handle more than two tuples
|
||||
let tokens1 = vec![Token::FixedBytes(vec![1, 2, 3, 4]), Token::Bool(true)];
|
||||
let tokens2 = vec![Token::Bool(false), Token::Uint(U256::from(13u8))];
|
||||
let tokens = vec![Token::Tuple(tokens1), Token::Tuple(tokens2)];
|
||||
let data: (([u8; 4], bool), (bool, u8)) = Detokenize::from_tokens(tokens).unwrap();
|
||||
assert_eq!((data.0).0[0], 1);
|
||||
assert_eq!((data.0).0[1], 2);
|
||||
assert_eq!((data.0).0[2], 3);
|
||||
assert_eq!((data.0).0[3], 4);
|
||||
assert_eq!((data.0).1, true);
|
||||
assert_eq!((data.1).0, false);
|
||||
assert_eq!((data.1).1, 13u8);
|
||||
|
||||
// error if no tokens in the vector
|
||||
let tokens = vec![];
|
||||
let data: Result<U256, InvalidOutputType> = Detokenize::from_tokens(tokens);
|
||||
assert!(data.is_err());
|
||||
}
|
||||
}
|
||||
|
|
|
|||
Loading…
Reference in New Issue