755 lines
23 KiB
Rust
755 lines
23 KiB
Rust
//! TODO
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use eyre::Result;
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use inflector::Inflector;
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use std::{collections::BTreeMap, fs, io::Write, path::Path};
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use crate::{util, Abigen, ContractBindings};
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/// Collects Abigen structs for a series of contracts, pending generation of
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/// the contract bindings.
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#[derive(Debug, Clone)]
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pub struct MultiAbigen {
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/// Abigen objects to be written
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abigens: Vec<Abigen>,
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}
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impl std::ops::Deref for MultiAbigen {
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type Target = Vec<Abigen>;
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fn deref(&self) -> &Self::Target {
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&self.abigens
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}
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}
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impl From<Vec<Abigen>> for MultiAbigen {
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fn from(abigens: Vec<Abigen>) -> Self {
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Self { abigens }
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}
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}
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impl std::iter::FromIterator<Abigen> for MultiAbigen {
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fn from_iter<I: IntoIterator<Item = Abigen>>(iter: I) -> Self {
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iter.into_iter().collect::<Vec<_>>().into()
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}
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}
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impl MultiAbigen {
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/// Create a new instance from a series (`contract name`, `abi_source`)
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///
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/// See `Abigen::new`
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pub fn new<I, Name, Source>(abis: I) -> Result<Self>
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where
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I: IntoIterator<Item = (Name, Source)>,
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Name: AsRef<str>,
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Source: AsRef<str>,
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{
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let abis = abis
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.into_iter()
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.map(|(contract_name, abi_source)| Abigen::new(contract_name.as_ref(), abi_source))
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.collect::<Result<Vec<_>>>()?;
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Ok(Self::from_abigens(abis))
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}
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/// Create a new instance from a series of already resolved `Abigen`
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pub fn from_abigens(abis: impl IntoIterator<Item = Abigen>) -> Self {
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abis.into_iter().collect()
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}
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/// Reads all json files contained in the given `dir` and use the file name for the name of the
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/// `ContractBindings`.
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/// This is equivalent to calling `MultiAbigen::new` with all the json files and their filename.
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///
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/// # Example
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///
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/// ```text
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/// abi
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/// ├── ERC20.json
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/// ├── Contract1.json
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/// ├── Contract2.json
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/// ...
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/// ```
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///
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/// ```no_run
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/// # use ethers_contract_abigen::MultiAbigen;
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/// let gen = MultiAbigen::from_json_files("./abi").unwrap();
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/// ```
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pub fn from_json_files(root: impl AsRef<Path>) -> Result<Self> {
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util::json_files(root.as_ref()).into_iter().map(Abigen::from_file).collect()
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}
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/// Add another Abigen to the module or lib
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pub fn push(&mut self, abigen: Abigen) {
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self.abigens.push(abigen)
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}
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/// Build the contract bindings and prepare for writing
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pub fn build(self) -> Result<MultiBindings> {
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let bindings = self
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.abigens
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.into_iter()
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.map(|v| v.generate())
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.collect::<Result<Vec<_>>>()?
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.into_iter()
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.map(|v| (v.name.clone(), v))
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.collect();
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Ok(MultiBindings { bindings })
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}
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}
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/// Output of the [`MultiAbigen`] build process. `MultiBindings` wraps a group
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/// of built contract bindings that have yet to be written to disk.
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///
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/// `MultiBindings` enables the user to
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/// 1. Write a collection of bindings to a rust module
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/// 2. Write a collection of bindings to a rust lib
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/// 3. Ensure that a collection of bindings matches an on-disk module or lib.
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///
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/// Generally we recommend writing the bindings to a module folder within your
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/// rust project. Users seeking to create "official" bindings for some project
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/// may instead write an entire library to publish via crates.io.
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///
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/// Rather than using `MultiAbigen` in a build script, we recommend committing
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/// the generated files, and replacing the build script with an integration
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/// test. To enable this, we have provided
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/// `MultiBindings::ensure_consistent_bindings` and
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/// `MultiBindings::ensure_consistent_crate`. These functions generate the
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/// expected module or library in memory, and check that the on-disk files
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/// match the expected files. We recommend running these inside CI.
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///
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/// This has several advantages:
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/// * No need for downstream users to compile the build script
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/// * No need for downstream users to run the whole `abigen!` generation steps
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/// * The generated code is more usable in an IDE
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/// * CI will fail if the generated code is out of date (if `abigen!` or the contract's ABI itself
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/// changed)
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pub struct MultiBindings {
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/// Abigen objects to be written
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bindings: BTreeMap<String, ContractBindings>,
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}
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// deref allows for inspection without modification
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impl std::ops::Deref for MultiBindings {
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type Target = BTreeMap<String, ContractBindings>;
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fn deref(&self) -> &Self::Target {
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&self.bindings
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}
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}
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impl MultiBindings {
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/// Generat the contents of the `Cargo.toml` file for a lib
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fn generate_cargo_toml(
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&self,
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name: impl AsRef<str>,
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version: impl AsRef<str>,
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) -> Result<Vec<u8>> {
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let mut toml = vec![];
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writeln!(toml, "[package]")?;
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writeln!(toml, r#"name = "{}""#, name.as_ref())?;
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writeln!(toml, r#"version = "{}""#, version.as_ref())?;
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writeln!(toml, r#"edition = "2021""#)?;
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writeln!(toml)?;
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writeln!(toml, "# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html")?;
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writeln!(toml)?;
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writeln!(toml, "[dependencies]")?;
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writeln!(
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toml,
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r#"ethers = {{ git = "https://github.com/gakonst/ethers-rs", default-features = false }}"#
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)?;
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Ok(toml)
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}
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/// Write the contents of `Cargo.toml` to disk
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fn write_cargo_toml(
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&self,
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lib: &Path,
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name: impl AsRef<str>,
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version: impl AsRef<str>,
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) -> Result<()> {
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let contents = self.generate_cargo_toml(name, version)?;
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let mut file = fs::OpenOptions::new()
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.read(true)
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.write(true)
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.create_new(true)
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.open(lib.join("Cargo.toml"))?;
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file.write_all(&contents)?;
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Ok(())
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}
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/// Generate the shared prefix of the `lib.rs` or `mod.rs`
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fn generate_prefix(
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&self,
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mut buf: impl Write,
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is_crate: bool,
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single_file: bool,
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) -> Result<()> {
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writeln!(buf, "#![allow(clippy::all)]")?;
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writeln!(
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buf,
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"//! This {} contains abigen! generated bindings for solidity contracts.",
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if is_crate { "lib" } else { "module" }
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)?;
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writeln!(buf, "//! This is autogenerated code.")?;
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writeln!(buf, "//! Do not manually edit these files.")?;
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writeln!(
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buf,
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"//! {} may be overwritten by the codegen system at any time.",
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if single_file && !is_crate { "This file" } else { "These files" }
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)?;
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Ok(())
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}
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/// Append module declarations to the `lib.rs` or `mod.rs`
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fn append_module_names(&self, mut buf: impl Write) -> Result<()> {
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// sorting here not necessary, as btreemap keys are ordered
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for module in self.bindings.keys().map(|name| format!("pub mod {};", name.to_snake_case()))
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{
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writeln!(buf, "{}", module)?;
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}
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Ok(())
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}
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/// Generate the contents of `lib.rs` or `mod.rs`
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fn generate_super_contents(&self, is_crate: bool, single_file: bool) -> Result<Vec<u8>> {
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let mut contents = vec![];
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self.generate_prefix(&mut contents, is_crate, single_file)?;
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if !single_file {
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self.append_module_names(&mut contents)?;
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} else {
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for binding in self.bindings.values() {
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binding.write(&mut contents)?;
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}
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}
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Ok(contents)
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}
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/// Write the `lib.rs` or `mod.rs` to disk
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fn write_super_file(&self, path: &Path, is_crate: bool, single_file: bool) -> Result<()> {
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let filename = if is_crate { "lib.rs" } else { "mod.rs" };
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let contents = self.generate_super_contents(is_crate, single_file)?;
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fs::write(path.join(filename), contents)?;
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Ok(())
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}
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/// Write all contract bindings to their respective files
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fn write_bindings(&self, path: &Path) -> Result<()> {
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for binding in self.bindings.values() {
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binding.write_module_in_dir(path)?;
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}
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Ok(())
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}
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/// Generates all the bindings and writes them to the given module
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///
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/// # Example
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///
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/// Read all json abi files from the `./abi` directory
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/// ```text
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/// abi
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/// ├── ERC20.json
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/// ├── Contract1.json
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/// ├── Contract2.json
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/// ...
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/// ```
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///
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/// and write them to the `./src/contracts` location as
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///
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/// ```text
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/// src/contracts
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/// ├── mod.rs
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/// ├── er20.rs
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/// ├── contract1.rs
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/// ├── contract2.rs
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/// ...
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/// ```
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///
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/// ```no_run
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/// # use ethers_contract_abigen::MultiAbigen;
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/// let gen = MultiAbigen::from_json_files("./abi").unwrap();
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/// let bindings = gen.build().unwrap();
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/// bindings.write_to_module("./src/contracts", false).unwrap();
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/// ```
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pub fn write_to_module(self, module: impl AsRef<Path>, single_file: bool) -> Result<()> {
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let module = module.as_ref();
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fs::create_dir_all(module)?;
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self.write_super_file(module, false, single_file)?;
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if !single_file {
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self.write_bindings(module)?;
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}
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Ok(())
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}
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/// Generates all the bindings and writes a library crate containing them
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/// to the provided path
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///
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/// # Example
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///
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/// Read all json abi files from the `./abi` directory
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/// ```text
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/// abi
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/// ├── ERC20.json
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/// ├── Contract1.json
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/// ├── Contract2.json
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/// ├── Contract3/
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/// ├── Contract3.json
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/// ...
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/// ```
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///
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/// and write them to the `./bindings` location as
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///
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/// ```text
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/// bindings
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/// ├── Cargo.toml
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/// ├── src/
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/// ├── lib.rs
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/// ├── er20.rs
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/// ├── contract1.rs
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/// ├── contract2.rs
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/// ...
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/// ```
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///
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/// ```no_run
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/// # use ethers_contract_abigen::MultiAbigen;
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/// let gen = MultiAbigen::from_json_files("./abi").unwrap();
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/// let bindings = gen.build().unwrap();
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/// bindings.write_to_crate(
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/// "my-crate", "0.0.5", "./bindings", false
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/// ).unwrap();
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/// ```
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pub fn write_to_crate(
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self,
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name: impl AsRef<str>,
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version: impl AsRef<str>,
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lib: impl AsRef<Path>,
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single_file: bool,
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) -> Result<()> {
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let lib = lib.as_ref();
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let src = lib.join("src");
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fs::create_dir_all(&src)?;
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self.write_cargo_toml(lib, name, version)?;
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self.write_super_file(&src, true, single_file)?;
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if !single_file {
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self.write_bindings(&src)?;
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}
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Ok(())
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}
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/// Ensures the contents of the bindings directory are correct
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///
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/// Does this by first generating the `lib.rs` or `mod.rs`, then the
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/// contents of each binding file in turn.
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fn ensure_consistent_bindings(
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self,
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dir: impl AsRef<Path>,
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is_crate: bool,
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single_file: bool,
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) -> Result<()> {
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let dir = dir.as_ref();
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let super_name = if is_crate { "lib.rs" } else { "mod.rs" };
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let super_contents = self.generate_super_contents(is_crate, single_file)?;
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check_file_in_dir(dir, super_name, &super_contents)?;
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// If it is single file, we skip checking anything but the super
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// contents
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if !single_file {
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for binding in self.bindings.values() {
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check_binding_in_dir(dir, binding)?;
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}
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}
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Ok(())
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}
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/// This ensures that the already generated bindings crate matches the
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/// output of a fresh new run. Run this in a rust test, to get notified in
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/// CI if the newly generated bindings deviate from the already generated
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/// ones, and it's time to generate them again. This could happen if the
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/// ABI of a contract or the output that `ethers` generates changed.
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///
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/// If this functions is run within a test during CI and fails, then it's
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/// time to update all bindings.
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///
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/// # Returns
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///
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/// `Ok(())` if the freshly generated bindings match with the
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/// existing bindings. Otherwise an `Err(_)` containing an `eyre::Report`
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/// with more information.
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///
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/// # Example
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///
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/// Check that the generated files are up to date
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///
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/// ```no_run
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/// # use ethers_contract_abigen::MultiAbigen;
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/// #[test]
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/// fn generated_bindings_are_fresh() {
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/// let project_root = std::path::Path::new(&env!("CARGO_MANIFEST_DIR"));
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/// let abi_dir = project_root.join("abi");
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/// let gen = MultiAbigen::from_json_files(&abi_dir).unwrap();
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/// let bindings = gen.build().unwrap();
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/// bindings.ensure_consistent_crate(
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/// "my-crate", "0.0.1", project_root.join("src/contracts"), false
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/// ).expect("inconsistent bindings");
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/// }
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/// ```
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pub fn ensure_consistent_crate(
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self,
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name: impl AsRef<str>,
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version: impl AsRef<str>,
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crate_path: impl AsRef<Path>,
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single_file: bool,
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) -> Result<()> {
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let crate_path = crate_path.as_ref();
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// additionally check the contents of the cargo
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let cargo_contents = self.generate_cargo_toml(name, version)?;
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check_file_in_dir(crate_path, "Cargo.toml", &cargo_contents)?;
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self.ensure_consistent_bindings(crate_path.join("src"), true, single_file)?;
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Ok(())
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}
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/// This ensures that the already generated bindings module matches the
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/// output of a fresh new run. Run this in a rust test, to get notified in
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/// CI if the newly generated bindings deviate from the already generated
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/// ones, and it's time to generate them again. This could happen if the
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/// ABI of a contract or the output that `ethers` generates changed.
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///
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/// If this functions is run within a test during CI and fails, then it's
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/// time to update all bindings.
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///
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/// # Returns
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///
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/// `Ok(())` if the freshly generated bindings match with the
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/// existing bindings. Otherwise an `Err(_)` containing an `eyre::Report`
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/// with more information.
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///
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/// # Example
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///
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/// Check that the generated files are up to date
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///
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/// ```no_run
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/// # use ethers_contract_abigen::MultiAbigen;
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/// #[test]
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/// fn generated_bindings_are_fresh() {
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/// let project_root = std::path::Path::new(&env!("CARGO_MANIFEST_DIR"));
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/// let abi_dir = project_root.join("abi");
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/// let gen = MultiAbigen::from_json_files(&abi_dir).unwrap();
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/// let bindings = gen.build().unwrap();
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/// bindings.ensure_consistent_module(
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/// project_root.join("src/contracts"), false
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/// ).expect("inconsistent bindings");
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/// }
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/// ```
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pub fn ensure_consistent_module(
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self,
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module: impl AsRef<Path>,
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single_file: bool,
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) -> Result<()> {
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self.ensure_consistent_bindings(module, false, single_file)?;
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Ok(())
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}
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}
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fn check_file_in_dir(dir: &Path, file_name: &str, expected_contents: &[u8]) -> Result<()> {
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eyre::ensure!(dir.is_dir(), "Not a directory: {}", dir.display());
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let file_path = dir.join(file_name);
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eyre::ensure!(file_path.is_file(), "Not a file: {}", file_path.display());
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let contents = fs::read(file_path).expect("Unable to read file");
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eyre::ensure!(contents == expected_contents, "file contents do not match");
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Ok(())
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}
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fn check_binding_in_dir(dir: &Path, binding: &ContractBindings) -> Result<()> {
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let name = binding.module_filename();
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let contents = binding.to_vec();
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check_file_in_dir(dir, &name, &contents)?;
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Ok(())
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}
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#[cfg(test)]
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mod tests {
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use super::*;
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use std::{panic, path::PathBuf};
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struct Context {
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multi_gen: MultiAbigen,
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mod_root: PathBuf,
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}
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fn run_test<T>(test: T)
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where
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T: FnOnce(&Context) -> () + panic::UnwindSafe,
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{
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let crate_root = std::path::Path::new(&env!("CARGO_MANIFEST_DIR")).to_owned();
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let console = Abigen::new(
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"Console",
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crate_root.join("../tests/solidity-contracts/console.json").display().to_string(),
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)
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.unwrap();
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|
let simple_storage = Abigen::new(
|
|
"SimpleStorage",
|
|
crate_root
|
|
.join("../tests/solidity-contracts/simplestorage_abi.json")
|
|
.display()
|
|
.to_string(),
|
|
)
|
|
.unwrap();
|
|
|
|
let human_readable = Abigen::new(
|
|
"HrContract",
|
|
r#"[
|
|
struct Foo { uint256 x; }
|
|
function foo(Foo memory x)
|
|
function bar(uint256 x, uint256 y, address addr)
|
|
yeet(uint256,uint256,address)
|
|
]"#,
|
|
)
|
|
.unwrap();
|
|
|
|
let multi_gen = MultiAbigen::from_abigens([console, simple_storage, human_readable]);
|
|
|
|
let mod_root = tempfile::tempdir().unwrap().path().join("contracts");
|
|
let context = Context { multi_gen, mod_root };
|
|
|
|
let result = panic::catch_unwind(|| test(&context));
|
|
|
|
assert!(result.is_ok())
|
|
}
|
|
|
|
#[test]
|
|
fn can_generate_multi_file_module() {
|
|
run_test(|context| {
|
|
let Context { multi_gen, mod_root } = context;
|
|
|
|
let single_file = false;
|
|
|
|
multi_gen.clone().build().unwrap().write_to_module(&mod_root, single_file).unwrap();
|
|
multi_gen
|
|
.clone()
|
|
.build()
|
|
.unwrap()
|
|
.ensure_consistent_module(&mod_root, single_file)
|
|
.expect("Inconsistent bindings");
|
|
})
|
|
}
|
|
|
|
#[test]
|
|
fn can_generate_single_file_module() {
|
|
run_test(|context| {
|
|
let Context { multi_gen, mod_root } = context;
|
|
|
|
let single_file = true;
|
|
|
|
multi_gen.clone().build().unwrap().write_to_module(&mod_root, single_file).unwrap();
|
|
multi_gen
|
|
.clone()
|
|
.build()
|
|
.unwrap()
|
|
.ensure_consistent_module(&mod_root, single_file)
|
|
.expect("Inconsistent bindings");
|
|
})
|
|
}
|
|
|
|
#[test]
|
|
fn can_generate_multi_file_crate() {
|
|
run_test(|context| {
|
|
let Context { multi_gen, mod_root } = context;
|
|
|
|
let single_file = false;
|
|
let name = "a-name";
|
|
let version = "290.3782.3";
|
|
|
|
multi_gen
|
|
.clone()
|
|
.build()
|
|
.unwrap()
|
|
.write_to_crate(name, version, &mod_root, single_file)
|
|
.unwrap();
|
|
multi_gen
|
|
.clone()
|
|
.build()
|
|
.unwrap()
|
|
.ensure_consistent_crate(name, version, &mod_root, single_file)
|
|
.expect("Inconsistent bindings");
|
|
})
|
|
}
|
|
|
|
#[test]
|
|
fn can_generate_single_file_crate() {
|
|
run_test(|context| {
|
|
let Context { multi_gen, mod_root } = context;
|
|
|
|
let single_file = true;
|
|
let name = "a-name";
|
|
let version = "290.3782.3";
|
|
|
|
multi_gen
|
|
.clone()
|
|
.build()
|
|
.unwrap()
|
|
.write_to_crate(name, version, &mod_root, single_file)
|
|
.unwrap();
|
|
multi_gen
|
|
.clone()
|
|
.build()
|
|
.unwrap()
|
|
.ensure_consistent_crate(name, version, &mod_root, single_file)
|
|
.expect("Inconsistent bindings");
|
|
})
|
|
}
|
|
|
|
#[test]
|
|
fn can_detect_incosistent_multi_file_module() {
|
|
run_test(|context| {
|
|
let Context { multi_gen, mod_root } = context;
|
|
|
|
let single_file = false;
|
|
|
|
multi_gen.clone().build().unwrap().write_to_module(&mod_root, single_file).unwrap();
|
|
|
|
let mut cloned = multi_gen.clone();
|
|
cloned.push(
|
|
Abigen::new(
|
|
"AdditionalContract",
|
|
r#"[
|
|
getValue() (uint256)
|
|
]"#,
|
|
)
|
|
.unwrap(),
|
|
);
|
|
|
|
let result =
|
|
cloned.build().unwrap().ensure_consistent_module(&mod_root, single_file).is_err();
|
|
|
|
// ensure inconsistent bindings are detected
|
|
assert!(result, "Inconsistent bindings wrongly approved");
|
|
})
|
|
}
|
|
|
|
#[test]
|
|
fn can_detect_incosistent_single_file_module() {
|
|
run_test(|context| {
|
|
let Context { multi_gen, mod_root } = context;
|
|
|
|
let single_file = true;
|
|
|
|
multi_gen.clone().build().unwrap().write_to_module(&mod_root, single_file).unwrap();
|
|
|
|
let mut cloned = multi_gen.clone();
|
|
cloned.push(
|
|
Abigen::new(
|
|
"AdditionalContract",
|
|
r#"[
|
|
getValue() (uint256)
|
|
]"#,
|
|
)
|
|
.unwrap(),
|
|
);
|
|
|
|
let result =
|
|
cloned.build().unwrap().ensure_consistent_module(&mod_root, single_file).is_err();
|
|
|
|
// ensure inconsistent bindings are detected
|
|
assert!(result, "Inconsistent bindings wrongly approved");
|
|
})
|
|
}
|
|
|
|
#[test]
|
|
fn can_detect_incosistent_multi_file_crate() {
|
|
run_test(|context| {
|
|
let Context { multi_gen, mod_root } = context;
|
|
|
|
let single_file = false;
|
|
let name = "a-name";
|
|
let version = "290.3782.3";
|
|
|
|
multi_gen
|
|
.clone()
|
|
.build()
|
|
.unwrap()
|
|
.write_to_crate(name, version, &mod_root, single_file)
|
|
.unwrap();
|
|
|
|
let mut cloned = multi_gen.clone();
|
|
cloned.push(
|
|
Abigen::new(
|
|
"AdditionalContract",
|
|
r#"[
|
|
getValue() (uint256)
|
|
]"#,
|
|
)
|
|
.unwrap(),
|
|
);
|
|
|
|
let result = cloned
|
|
.build()
|
|
.unwrap()
|
|
.ensure_consistent_crate(name, version, &mod_root, single_file)
|
|
.is_err();
|
|
|
|
// ensure inconsistent bindings are detected
|
|
assert!(result, "Inconsistent bindings wrongly approved");
|
|
})
|
|
}
|
|
|
|
#[test]
|
|
fn can_detect_incosistent_single_file_crate() {
|
|
run_test(|context| {
|
|
let Context { multi_gen, mod_root } = context;
|
|
|
|
let single_file = true;
|
|
let name = "a-name";
|
|
let version = "290.3782.3";
|
|
|
|
multi_gen
|
|
.clone()
|
|
.build()
|
|
.unwrap()
|
|
.write_to_crate(name, version, &mod_root, single_file)
|
|
.unwrap();
|
|
|
|
let mut cloned = multi_gen.clone();
|
|
cloned.push(
|
|
Abigen::new(
|
|
"AdditionalContract",
|
|
r#"[
|
|
getValue() (uint256)
|
|
]"#,
|
|
)
|
|
.unwrap(),
|
|
);
|
|
|
|
let result = cloned
|
|
.build()
|
|
.unwrap()
|
|
.ensure_consistent_crate(name, version, &mod_root, single_file)
|
|
.is_err();
|
|
|
|
// ensure inconsistent bindings are detected
|
|
assert!(result, "Inconsistent bindings wrongly approved");
|
|
})
|
|
}
|
|
}
|