git.delta.rocks / unique-network / refs/commits / ae73107d235e

1// Copyright 2019-2022 Unique Network (Gibraltar) Ltd.2// This file is part of Unique Network.34// Unique Network is free software: you can redistribute it and/or modify5// it under the terms of the GNU General Public License as published by6// the Free Software Foundation, either version 3 of the License, or7// (at your option) any later version.89// Unique Network is distributed in the hope that it will be useful,10// but WITHOUT ANY WARRANTY; without even the implied warranty of11// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the12// GNU General Public License for more details.1314// You should have received a copy of the GNU General Public License15// along with Unique Network. If not, see <http://www.gnu.org/licenses/>.1617#![doc = include_str!("../README.md")]18#![deny(missing_docs)]19#![cfg_attr(not(feature = "std"), no_std)]20#[cfg(not(feature = "std"))]21extern crate alloc;2223use abi::{AbiRead, AbiReader, AbiWriter};24pub use evm_coder_procedural::{event_topic, fn_selector};25pub mod abi;26pub use events::{ToLog, ToTopic};27use execution::DispatchInfo;28pub mod execution;2930/// Derives call enum implementing [`crate::Callable`], [`crate::Weighted`]31/// and [`crate::Call`] from impl block.32///33/// ## Macro syntax34///35/// `#[solidity_interface(name, is, inline_is, events)]`36/// - *name* - used in generated code, and for Call enum name37/// - *is* - used to provide inheritance in Solidity38/// - *inline_is* - same as `is`, but ERC165::SupportsInterface will work differently: For `is` SupportsInterface(A) will return true39///   if A is one of the interfaces the contract is inherited from (e.g. B is created as `is(A)`). If B is created as `inline_is(A)`40///   SupportsInterface(A) will internally create a new interface that combines all methods of A and B, so SupportsInterface(A) will return41///   false.42///43/// `#[weight(value)]`44/// Can be added to every method of impl block, used for deriving [`crate::Weighted`], which45/// is used by substrate bridge.46/// - *value*: expression, which evaluates to weight required to call this method.47/// This expression can use call arguments to calculate non-constant execution time.48/// This expression should evaluate faster than actual execution does, and may provide worse case49/// than one is called.50///51/// `#[solidity_interface(rename_selector)]`52/// - *rename_selector* - by default, selector name will be generated by transforming method name53/// from snake_case to camelCase. Use this option, if other naming convention is required.54/// I.e: method `token_uri` will be automatically renamed to `tokenUri` in selector, but name55/// required by ERC721 standard is `tokenURI`, thus we need to specify `rename_selector = "tokenURI"`56/// explicitly.57///58/// Both contract and contract methods may have doccomments, which will end up in a generated59/// solidity interface file, thus you should use [solidity syntax](https://docs.soliditylang.org/en/latest/natspec-format.html) for writing documentation in this macro60///61/// ## Example62///63/// ```ignore64/// struct SuperContract;65/// struct InlineContract;66/// struct Contract;67///68/// #[derive(ToLog)]69/// enum ContractEvents {70///     Event(#[indexed] uint32),71/// }72///73/// /// @dev This contract provides function to multiply two numbers74/// #[solidity_interface(name = MyContract, is(SuperContract), inline_is(InlineContract))]75/// impl Contract {76///     /// Multiply two numbers77///     /// @param a First number78///     /// @param b Second number79///     /// @return uint32 Product of two passed numbers80///     /// @dev This function returns error in case of overflow81///     #[weight(200 + a + b)]82///     #[solidity_interface(rename_selector = "mul")]83///     fn mul(&mut self, a: uint32, b: uint32) -> Result<uint32> {84///         Ok(a.checked_mul(b).ok_or("overflow")?)85///     }86/// }87/// ```88pub use evm_coder_procedural::solidity_interface;89/// See [`solidity_interface`]90pub use evm_coder_procedural::solidity;91/// See [`solidity_interface`]92pub use evm_coder_procedural::weight;9394/// Derives [`ToLog`] for enum95///96/// Selectors will be derived from variant names, there is currently no way to have custom naming97/// for them98///99/// `#[indexed]`100/// Marks this field as indexed, so it will appear in [`ethereum::Log`] topics instead of data101pub use evm_coder_procedural::ToLog;102103// Api of those modules shouldn't be consumed directly, it is only exported for usage in proc macros104#[doc(hidden)]105pub mod events;106#[doc(hidden)]107pub mod solidity;108109/// Solidity type definitions (aliases from solidity name to rust type)110/// To be used in [`solidity_interface`] definitions, to make sure there is no111/// type conflict between Rust code and generated definitions112pub mod types {113	#![allow(non_camel_case_types, missing_docs)]114115	#[cfg(not(feature = "std"))]116	use alloc::{vec::Vec};117	use primitive_types::{U256, H160, H256};118119	pub type address = H160;120121	pub type uint8 = u8;122	pub type uint16 = u16;123	pub type uint32 = u32;124	pub type uint64 = u64;125	pub type uint128 = u128;126	pub type uint256 = U256;127128	pub type bytes4 = [u8; 4];129130	pub type topic = H256;131132	#[cfg(not(feature = "std"))]133	pub type string = ::alloc::string::String;134	#[cfg(feature = "std")]135	pub type string = ::std::string::String;136	pub type bytes = Vec<u8>;137138	/// Solidity doesn't have `void` type, however we have special implementation139	/// for empty tuple return type140	pub type void = ();141142	//#region Special types143	/// Makes function payable144	pub type value = U256;145	/// Makes function caller-sensitive146	pub type caller = address;147	//#endregion148149	/// Ethereum typed call message, similar to solidity150	/// `msg` object.151	pub struct Msg<C> {152		pub call: C,153		/// Address of user, which called this contract.154		pub caller: H160,155		/// Payment amount to contract.156		/// Contract should reject payment, if target call is not payable,157		/// and there is no `receiver()` function defined.158		pub value: U256,159	}160}161162/// Parseable EVM call, this trait should be implemented with [`solidity_interface`] macro163pub trait Call: Sized {164	/// Parse call buffer into typed call enum165	fn parse(selector: types::bytes4, input: &mut AbiReader) -> execution::Result<Option<Self>>;166}167168/// Intended to be used as `#[weight]` output type169/// Should be same between evm-coder and substrate to avoid confusion170///171/// Isn't same thing as gas, some mapping is required between those types172pub type Weight = frame_support::weights::Weight;173174/// In substrate, we have benchmarking, which allows175/// us to not rely on gas metering, but instead predict amount of gas to execute call176pub trait Weighted: Call {177	/// Predict weight of this call178	fn weight(&self) -> DispatchInfo;179}180181/// Type callable with ethereum message, may be implemented by [`solidity_interface`] macro182/// on interface implementation, or for externally-owned real EVM contract183pub trait Callable<C: Call> {184	/// Call contract using specified call data185	fn call(&mut self, call: types::Msg<C>) -> execution::ResultWithPostInfo<AbiWriter>;186}187188/// Implementation of ERC165 is implicitly generated for all interfaces in [`solidity_interface`],189/// this structure holds parsed data for ERC165Call subvariant190///191/// Note: no [`Callable`] implementation is provided, call implementation is inlined into every192/// implementing contract193///194/// See <https://eips.ethereum.org/EIPS/eip-165>195#[derive(Debug)]196pub enum ERC165Call {197	/// ERC165 provides single method, which returns true, if contract198	/// implements specified interface199	SupportsInterface {200		/// Requested interface201		interface_id: types::bytes4,202	},203}204205impl ERC165Call {206	/// ERC165 selector is provided by standard207	pub const INTERFACE_ID: types::bytes4 = u32::to_be_bytes(0x01ffc9a7);208}209210impl Call for ERC165Call {211	fn parse(selector: types::bytes4, input: &mut AbiReader) -> execution::Result<Option<Self>> {212		if selector != Self::INTERFACE_ID {213			return Ok(None);214		}215		Ok(Some(Self::SupportsInterface {216			interface_id: input.abi_read()?,217		}))218	}219}220221/// Generate "tests", which will generate solidity code on execution and print it to stdout222/// Script at .maintain/scripts/generate_api.sh can split this output from test runtime223///224/// This macro receives type usage as second argument, but you can use anything as generics,225/// because no bounds are implied226#[macro_export]227macro_rules! generate_stubgen {228	($name:ident, $decl:ty, $is_impl:literal) => {229		#[test]230		#[ignore]231		fn $name() {232			use evm_coder::solidity::TypeCollector;233			let mut out = TypeCollector::new();234			<$decl>::generate_solidity_interface(&mut out, $is_impl);235			println!("=== SNIP START ===");236			println!("// SPDX-License-Identifier: OTHER");237			println!("// This code is automatically generated");238			println!();239			println!("pragma solidity >=0.8.0 <0.9.0;");240			println!();241			for b in out.finish() {242				println!("{}", b);243			}244			println!("=== SNIP END ===");245		}246	};247}248249#[cfg(test)]250mod tests {251	use super::*;252253	#[test]254	fn function_selector_generation() {255		assert_eq!(fn_selector!(transfer(address, uint256)), 0xa9059cbb);256	}257258	#[test]259	fn event_topic_generation() {260		assert_eq!(261			hex::encode(&event_topic!(Transfer(address, address, uint256))[..]),262			"ddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef",263		);264	}265}