ethers-rs/ethers-contract/ethers-contract-abigen/src/multi.rs

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//! Generate bindings for multiple `Abigen`
use crate::{util, Abigen, Context, ContractBindings, ContractFilter, ExpandedContract};
use eyre::Result;
use inflector::Inflector;
use proc_macro2::TokenStream;
use quote::quote;
use std::{
collections::{BTreeMap, BTreeSet, HashMap, HashSet},
fs,
io::Write,
path::{Path, PathBuf},
};
use toml::Value;
/// The default ethers dependency to generate.
const DEFAULT_ETHERS_DEP: &str = "ethers = { git = \"https://github.com/gakonst/ethers-rs\", default-features = false, features = [\"abigen\"] }";
/// Collects Abigen structs for a series of contracts, pending generation of
/// the contract bindings.
#[derive(Debug, Clone)]
pub struct MultiAbigen {
/// Abigen objects to be written
abigens: Vec<Abigen>,
}
impl std::ops::Deref for MultiAbigen {
type Target = Vec<Abigen>;
fn deref(&self) -> &Self::Target {
&self.abigens
}
}
impl From<Vec<Abigen>> for MultiAbigen {
fn from(abigens: Vec<Abigen>) -> Self {
Self { abigens }
}
}
impl std::iter::FromIterator<Abigen> for MultiAbigen {
fn from_iter<I: IntoIterator<Item = Abigen>>(iter: I) -> Self {
iter.into_iter().collect::<Vec<_>>().into()
}
}
impl MultiAbigen {
/// Create a new instance from a series (`contract name`, `abi_source`)
///
/// See `Abigen::new`
pub fn new<I, Name, Source>(abis: I) -> Result<Self>
where
I: IntoIterator<Item = (Name, Source)>,
Name: AsRef<str>,
Source: AsRef<str>,
{
let abis = abis
.into_iter()
.map(|(contract_name, abi_source)| Abigen::new(contract_name.as_ref(), abi_source))
.collect::<Result<Vec<_>>>()?;
Ok(Self::from_abigens(abis))
}
/// Create a new instance from a series of already resolved `Abigen`
pub fn from_abigens(abis: impl IntoIterator<Item = Abigen>) -> Self {
abis.into_iter().collect()
}
/// Reads all json files contained in the given `dir` and use the file name for the name of the
/// `ContractBindings`.
/// This is equivalent to calling `MultiAbigen::new` with all the json files and their filename.
///
/// # Example
///
/// ```text
/// abi
/// ├── ERC20.json
/// ├── Contract1.json
/// ├── Contract2.json
/// ...
/// ```
///
/// ```
/// # fn t() {
/// # use ethers_contract_abigen::MultiAbigen;
/// let gen = MultiAbigen::from_json_files("./abi").unwrap();
/// # }
/// ```
pub fn from_json_files(root: impl AsRef<Path>) -> Result<Self> {
util::json_files(root.as_ref()).into_iter().map(Abigen::from_file).collect()
}
/// See `apply_filter`
///
/// # Example
///
/// Only Select specific contracts
///
/// ```
/// use ethers_contract_abigen::{MultiAbigen, SelectContracts};
/// # fn t() {
/// let gen = MultiAbigen::from_json_files("./abi").unwrap().with_filter(
/// SelectContracts::default().add_name("MyContract").add_name("MyOtherContract"),
/// );
/// # }
/// ```
///
/// Exclude all contracts that end with test
///
/// ```
/// use ethers_contract_abigen::{ExcludeContracts, MultiAbigen};
/// # fn t() {
/// let gen = MultiAbigen::from_json_files("./abi").unwrap().with_filter(
/// ExcludeContracts::default().add_pattern(".*Test"),
/// );
/// # }
/// ```
#[must_use]
pub fn with_filter(mut self, filter: impl Into<ContractFilter>) -> Self {
self.apply_filter(&filter.into());
self
}
/// Removes all `Abigen` items that should not be included based on the given filter
pub fn apply_filter(&mut self, filter: &ContractFilter) {
self.abigens.retain(|abi| filter.is_match(&abi.contract_name))
}
/// Add another Abigen to the module or lib
pub fn push(&mut self, abigen: Abigen) {
self.abigens.push(abigen)
}
/// Build the contract bindings and prepare for writing
pub fn build(self) -> Result<MultiBindings> {
let rustfmt = self.abigens.iter().any(|gen| gen.rustfmt);
Ok(MultiBindings {
expansion: MultiExpansion::from_abigen(self.abigens)?.expand(),
rustfmt,
})
}
}
/// Represents a collection of [`Abigen::expand()`]
pub struct MultiExpansion {
// all expanded contracts collection from [`Abigen::expand()`]
contracts: Vec<(ExpandedContract, Context)>,
}
impl MultiExpansion {
/// Create a new instance that wraps the given `contracts`
pub fn new(contracts: Vec<(ExpandedContract, Context)>) -> Self {
Self { contracts }
}
/// Create a new instance by expanding all `Abigen` elements the given iterator yields
pub fn from_abigen(abigens: impl IntoIterator<Item = Abigen>) -> Result<Self> {
let contracts = abigens.into_iter().map(|abigen| abigen.expand()).collect::<Result<_>>()?;
Ok(Self::new(contracts))
}
/// Expands all contracts into a single `TokenStream`
///
/// This will deduplicate types into a separate `mod __shared_types` module, if any.
pub fn expand_inplace(self) -> TokenStream {
self.expand().expand_inplace()
}
/// Expands all contracts into separated [`TokenStream`]s
///
/// If there was type deduplication, this returns a list of [`TokenStream`] containing the type
/// definitions of all shared types.
pub fn expand(self) -> MultiExpansionResult {
let mut expansions = self.contracts;
let mut shared_types = Vec::new();
// this keeps track of those contracts that need to be updated after a struct was
// extracted from the contract's module and moved to the shared module
let mut dirty_contracts = HashSet::new();
// merge all types if more than 1 contract
if expansions.len() > 1 {
// check for type conflicts across all contracts
let mut conflicts: HashMap<String, Vec<usize>> = HashMap::new();
for (idx, (_, ctx)) in expansions.iter().enumerate() {
for type_identifier in ctx.internal_structs().rust_type_names().keys() {
conflicts
.entry(type_identifier.clone())
.or_insert_with(|| Vec::with_capacity(1))
.push(idx);
}
}
// resolve type conflicts
for (id, contracts) in conflicts.iter().filter(|(_, c)| c.len() > 1) {
// extract the shared type once
shared_types.push(
expansions[contracts[0]]
.1
.struct_definition(id)
.expect("struct def succeeded previously"),
);
// remove the shared type from the contract's bindings
for contract in contracts.iter().copied() {
expansions[contract].1.remove_struct(id);
dirty_contracts.insert(contract);
}
}
// regenerate all struct definitions that were hit
for contract in dirty_contracts.iter().copied() {
let (expanded, ctx) = &mut expansions[contract];
expanded.abi_structs = ctx.abi_structs().expect("struct def succeeded previously");
}
}
MultiExpansionResult { root: None, contracts: expansions, dirty_contracts, shared_types }
}
}
/// Represents an intermediary result of [`MultiExpansion::expand()`]
pub struct MultiExpansionResult {
/// The root dir at which this should be executed.
///
/// This is used to check if there's an existing `Cargo.toml`, from which we can derive the
/// proper `ethers` dependencies.
root: Option<PathBuf>,
contracts: Vec<(ExpandedContract, Context)>,
/// contains the indices of contracts with structs that need to be updated
dirty_contracts: HashSet<usize>,
/// all type definitions of types that are shared by multiple contracts
shared_types: Vec<TokenStream>,
}
impl MultiExpansionResult {
/// Expands all contracts into a single [`TokenStream`]
pub fn expand_inplace(mut self) -> TokenStream {
let mut tokens = TokenStream::new();
let shared_types_module = quote! {__shared_types};
// the import path to the shared types
let shared_path = quote!(
pub use super::#shared_types_module::*;
);
self.add_shared_import_path(shared_path);
let Self { contracts, shared_types, .. } = self;
if !shared_types.is_empty() {
tokens.extend(quote! {
pub mod #shared_types_module {
#( #shared_types )*
}
});
}
tokens.extend(contracts.into_iter().map(|(exp, _)| exp.into_tokens()));
tokens
}
/// Sets the directory from which this type should expand from.
///
/// This is used to try to find the proper `ethers` dependency if the `root` is an existing
/// workspace. By default, the cwd is assumed to be the `root`.
pub fn set_root(&mut self, root: impl Into<PathBuf>) {
self.root = Some(root.into());
}
/// Sets the path to the shared types module according to the value of `single_file`
///
/// If `single_file` then it's expected that types will be written to `shared_types.rs`
fn set_shared_import_path(&mut self, single_file: bool) {
let shared_path = if single_file {
quote!(
pub use super::__shared_types::*;
)
} else {
quote!(
pub use super::super::shared_types::*;
)
};
self.add_shared_import_path(shared_path);
}
/// adds the `shared` import path to every `dirty` contract
fn add_shared_import_path(&mut self, shared: TokenStream) {
for contract in self.dirty_contracts.iter().copied() {
let (expanded, ..) = &mut self.contracts[contract];
expanded.imports.extend(shared.clone());
}
}
/// Converts this result into [`MultiBindingsInner`]
fn into_bindings(mut self, single_file: bool, rustfmt: bool) -> MultiBindingsInner {
self.set_shared_import_path(single_file);
let Self { contracts, shared_types, root, .. } = self;
let bindings = contracts
.into_iter()
.map(|(expanded, ctx)| ContractBindings {
tokens: expanded.into_tokens(),
rustfmt,
name: ctx.contract_name().to_string(),
})
.map(|v| (v.name.clone(), v))
.collect();
let shared_types = if !shared_types.is_empty() {
let shared_types = if single_file {
quote! {
pub mod __shared_types {
#( #shared_types )*
}
}
} else {
quote! {
#( #shared_types )*
}
};
Some(ContractBindings {
tokens: shared_types,
rustfmt,
name: "shared_types".to_string(),
})
} else {
None
};
MultiBindingsInner { root, bindings, shared_types }
}
}
/// Output of the [`MultiAbigen`] build process. `MultiBindings` wraps a group
/// of built contract bindings that have yet to be written to disk.
///
/// `MultiBindings` enables the user to
/// 1. Write a collection of bindings to a rust module
/// 2. Write a collection of bindings to a rust lib
/// 3. Ensure that a collection of bindings matches an on-disk module or lib.
///
/// Generally we recommend writing the bindings to a module folder within your
/// rust project. Users seeking to create "official" bindings for some project
/// may instead write an entire library to publish via crates.io.
///
/// Rather than using `MultiAbigen` in a build script, we recommend committing
/// the generated files, and replacing the build script with an integration
/// test. To enable this, we have provided
/// `MultiBindings::ensure_consistent_bindings` and
/// `MultiBindings::ensure_consistent_crate`. These functions generate the
/// expected module or library in memory, and check that the on-disk files
/// match the expected files. We recommend running these inside CI.
///
/// This has several advantages:
/// * No need for downstream users to compile the build script
/// * No need for downstream users to run the whole `abigen!` generation steps
/// * The generated code is more usable in an IDE
/// * CI will fail if the generated code is out of date (if `abigen!` or the contract's ABI itself
/// changed)
pub struct MultiBindings {
expansion: MultiExpansionResult,
rustfmt: bool,
}
impl MultiBindings {
/// Returns the number of contracts to generate bindings for.
pub fn len(&self) -> usize {
self.expansion.contracts.len()
}
/// Returns whether there are any bindings to be generated
pub fn is_empty(&self) -> bool {
self.expansion.contracts.is_empty()
}
fn into_inner(self, single_file: bool) -> MultiBindingsInner {
self.expansion.into_bindings(single_file, self.rustfmt)
}
/// Generates all the bindings and writes them to the given module
///
/// # Example
///
/// Read all json abi files from the `./abi` directory
/// ```text
/// abi
/// ├── ERC20.json
/// ├── Contract1.json
/// ├── Contract2.json
/// ...
/// ```
///
/// and write them to the `./src/contracts` location as
///
/// ```text
/// src/contracts
/// ├── mod.rs
/// ├── er20.rs
/// ├── contract1.rs
/// ├── contract2.rs
/// ...
/// ```
///
/// ```no_run
/// # use ethers_contract_abigen::MultiAbigen;
/// let gen = MultiAbigen::from_json_files("./abi").unwrap();
/// let bindings = gen.build().unwrap();
/// bindings.write_to_module("./src/contracts", false).unwrap();
/// ```
pub fn write_to_module(self, module: impl AsRef<Path>, single_file: bool) -> Result<()> {
self.into_inner(single_file).write_to_module(module, single_file)
}
/// Generates all the bindings and writes a library crate containing them
/// to the provided path
///
/// # Example
///
/// Read all json abi files from the `./abi` directory
/// ```text
/// abi
/// ├── ERC20.json
/// ├── Contract1.json
/// ├── Contract2.json
/// ├── Contract3/
/// ├── Contract3.json
/// ...
/// ```
///
/// and write them to the `./bindings` location as
///
/// ```text
/// bindings
/// ├── Cargo.toml
/// ├── src/
/// ├── lib.rs
/// ├── er20.rs
/// ├── contract1.rs
/// ├── contract2.rs
/// ...
/// ```
///
/// ```no_run
/// # use ethers_contract_abigen::MultiAbigen;
/// let gen = MultiAbigen::from_json_files("./abi").unwrap();
/// let bindings = gen.build().unwrap();
/// bindings.write_to_crate(
/// "my-crate", "0.0.5", "./bindings", false
/// ).unwrap();
/// ```
pub fn write_to_crate(
self,
name: impl AsRef<str>,
version: impl AsRef<str>,
lib: impl AsRef<Path>,
single_file: bool,
) -> Result<()> {
self.into_inner(single_file).write_to_crate(name, version, lib, single_file)
}
/// This ensures that the already generated bindings crate matches the
/// output of a fresh new run. Run this in a rust test, to get notified in
/// CI if the newly generated bindings deviate from the already generated
/// ones, and it's time to generate them again. This could happen if the
/// ABI of a contract or the output that `ethers` generates changed.
///
/// If this functions is run within a test during CI and fails, then it's
/// time to update all bindings.
///
/// # Returns
///
/// `Ok(())` if the freshly generated bindings match with the
/// existing bindings. Otherwise an `Err(_)` containing an `eyre::Report`
/// with more information.
///
/// # Example
///
/// Check that the generated files are up to date
///
/// ```no_run
/// # use ethers_contract_abigen::MultiAbigen;
/// #[test]
/// fn generated_bindings_are_fresh() {
/// let project_root = std::path::Path::new(&env!("CARGO_MANIFEST_DIR"));
/// let abi_dir = project_root.join("abi");
/// let gen = MultiAbigen::from_json_files(&abi_dir).unwrap();
/// let bindings = gen.build().unwrap();
/// bindings.ensure_consistent_crate(
/// "my-crate", "0.0.1", project_root.join("src/contracts"), false, true
/// ).expect("inconsistent bindings");
/// }
/// ```
pub fn ensure_consistent_crate(
self,
name: impl AsRef<str>,
version: impl AsRef<str>,
crate_path: impl AsRef<Path>,
single_file: bool,
check_cargo_toml: bool,
) -> Result<()> {
self.into_inner(single_file).ensure_consistent_crate(
name,
version,
crate_path,
single_file,
check_cargo_toml,
)
}
/// This ensures that the already generated bindings module matches the
/// output of a fresh new run. Run this in a rust test, to get notified in
/// CI if the newly generated bindings deviate from the already generated
/// ones, and it's time to generate them again. This could happen if the
/// ABI of a contract or the output that `ethers` generates changed.
///
/// If this functions is run within a test during CI and fails, then it's
/// time to update all bindings.
///
/// # Returns
///
/// `Ok(())` if the freshly generated bindings match with the
/// existing bindings. Otherwise an `Err(_)` containing an `eyre::Report`
/// with more information.
///
/// # Example
///
/// Check that the generated files are up to date
///
/// ```no_run
/// # use ethers_contract_abigen::MultiAbigen;
/// #[test]
/// fn generated_bindings_are_fresh() {
/// let project_root = std::path::Path::new(&env!("CARGO_MANIFEST_DIR"));
/// let abi_dir = project_root.join("abi");
/// let gen = MultiAbigen::from_json_files(&abi_dir).unwrap();
/// let bindings = gen.build().unwrap();
/// bindings.ensure_consistent_module(
/// project_root.join("src/contracts"), false
/// ).expect("inconsistent bindings");
/// }
/// ```
pub fn ensure_consistent_module(
self,
module: impl AsRef<Path>,
single_file: bool,
) -> Result<()> {
self.into_inner(single_file).ensure_consistent_module(module, single_file)
}
}
struct MultiBindingsInner {
/// The root dir at which this should be executed.
///
/// This is used to check if there's an existing `Cargo.toml`, from which we can derive the
/// proper `ethers` dependencies.
root: Option<PathBuf>,
/// Abigen objects to be written
bindings: BTreeMap<String, ContractBindings>,
/// contains the content of the shared types if any
shared_types: Option<ContractBindings>,
}
// deref allows for inspection without modification
impl std::ops::Deref for MultiBindingsInner {
type Target = BTreeMap<String, ContractBindings>;
fn deref(&self) -> &Self::Target {
&self.bindings
}
}
impl MultiBindingsInner {
/// Generate the contents of the `Cargo.toml` file for a lib
fn generate_cargo_toml(
&self,
name: impl AsRef<str>,
version: impl AsRef<str>,
crate_version: String,
) -> Result<Vec<u8>> {
let mut toml = vec![];
writeln!(toml, "[package]")?;
writeln!(toml, r#"name = "{}""#, name.as_ref())?;
writeln!(toml, r#"version = "{}""#, version.as_ref())?;
writeln!(toml, r#"edition = "2021""#)?;
writeln!(toml)?;
writeln!(toml, "# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html")?;
writeln!(toml)?;
writeln!(toml, "[dependencies]")?;
writeln!(toml, r#"{}"#, crate_version)?;
Ok(toml)
}
/// Returns the ethers crate version to use.
///
/// If we fail to detect a matching `ethers` dependency, this returns the [`DEFAULT_ETHERS_DEP`]
/// version.
fn crate_version(&self) -> String {
self.try_find_crate_version().unwrap_or_else(|_| DEFAULT_ETHERS_DEP.to_string())
}
/// parses the active Cargo.toml to get what version of ethers we are using.
///
/// Fails if the existing `Cargo.toml` does not contain a valid ethers dependency
fn try_find_crate_version(&self) -> Result<String> {
let cargo_toml =
if let Some(root) = self.root.clone() { root } else { std::env::current_dir()? }
.join("Cargo.toml");
if !cargo_toml.exists() {
return Ok(DEFAULT_ETHERS_DEP.to_string())
}
let data = fs::read_to_string(cargo_toml)?;
let toml = data.parse::<Value>()?;
let ethers = toml
.get("dependencies")
.and_then(|v| v.get("ethers").or_else(|| v.get("ethers-contract")))
.ok_or_else(|| eyre::eyre!("couldn't find ethers or ethers-contract dependency"))?;
if let Some(rev) = ethers.get("rev") {
Ok(format!("ethers = {{ git = \"https://github.com/gakonst/ethers-rs\", rev = {}, default-features = false, features = [\"abigen\"] }}", rev))
} else if let Some(version) = ethers.get("version") {
Ok(format!(
"ethers = {{ version = {}, default-features = false, features = [\"abigen\"] }}",
version
))
} else {
Ok(DEFAULT_ETHERS_DEP.to_string())
}
}
/// Write the contents of `Cargo.toml` to disk
fn write_cargo_toml(
&self,
lib: &Path,
name: impl AsRef<str>,
version: impl AsRef<str>,
) -> Result<()> {
let crate_version = self.crate_version();
let contents = self.generate_cargo_toml(name, version, crate_version)?;
let mut file = fs::OpenOptions::new()
.read(true)
.write(true)
.create_new(true)
.open(lib.join("Cargo.toml"))?;
file.write_all(&contents)?;
Ok(())
}
/// Append module declarations to the `lib.rs` or `mod.rs`
fn append_module_names(&self, mut buf: impl Write) -> Result<()> {
let mut mod_names: BTreeSet<_> =
self.bindings.keys().map(|name| util::safe_module_name(name)).collect();
if let Some(ref shared) = self.shared_types {
mod_names.insert(shared.name.to_snake_case());
}
for module in mod_names.into_iter().map(|name| format!("pub mod {name};")) {
writeln!(buf, "{module}")?;
}
Ok(())
}
/// Generate the contents of `lib.rs` or `mod.rs`
fn generate_super_contents(&self, is_crate: bool, single_file: bool) -> Result<Vec<u8>> {
let mut contents = vec![];
generate_prefix(&mut contents, is_crate, single_file)?;
if single_file {
if let Some(ref shared) = self.shared_types {
shared.write(&mut contents)?;
}
for binding in self.bindings.values() {
binding.write(&mut contents)?;
}
} else {
self.append_module_names(&mut contents)?;
}
Ok(contents)
}
/// Write the `lib.rs` or `mod.rs` to disk
fn write_super_file(&self, path: &Path, is_crate: bool, single_file: bool) -> Result<()> {
let filename = if is_crate { "lib.rs" } else { "mod.rs" };
let contents = self.generate_super_contents(is_crate, single_file)?;
fs::write(path.join(filename), contents)?;
Ok(())
}
/// Write all contract bindings to their respective files
fn write_bindings(&self, path: &Path) -> Result<()> {
if let Some(ref shared) = self.shared_types {
shared.write_module_in_dir(path)?;
}
for binding in self.bindings.values() {
binding.write_module_in_dir(path)?;
}
Ok(())
}
fn write_to_module(self, module: impl AsRef<Path>, single_file: bool) -> Result<()> {
let module = module.as_ref();
fs::create_dir_all(module)?;
self.write_super_file(module, false, single_file)?;
if !single_file {
self.write_bindings(module)?;
}
Ok(())
}
fn write_to_crate(
self,
name: impl AsRef<str>,
version: impl AsRef<str>,
lib: impl AsRef<Path>,
single_file: bool,
) -> Result<()> {
let lib = lib.as_ref();
let src = lib.join("src");
fs::create_dir_all(&src)?;
self.write_cargo_toml(lib, name, version)?;
self.write_super_file(&src, true, single_file)?;
if !single_file {
self.write_bindings(&src)?;
}
Ok(())
}
/// Ensures the contents of the bindings directory are correct
///
/// Does this by first generating the `lib.rs` or `mod.rs`, then the
/// contents of each binding file in turn.
fn ensure_consistent_bindings(
self,
dir: impl AsRef<Path>,
is_crate: bool,
single_file: bool,
) -> Result<()> {
let dir = dir.as_ref();
let super_name = if is_crate { "lib.rs" } else { "mod.rs" };
let super_contents = self.generate_super_contents(is_crate, single_file)?;
check_file_in_dir(dir, super_name, &super_contents)?;
// If it is single file, we skip checking anything but the super
// contents
if !single_file {
for binding in self.bindings.values() {
check_binding_in_dir(dir, binding)?;
}
}
Ok(())
}
fn ensure_consistent_crate(
self,
name: impl AsRef<str>,
version: impl AsRef<str>,
crate_path: impl AsRef<Path>,
single_file: bool,
check_cargo_toml: bool,
) -> Result<()> {
let crate_path = crate_path.as_ref();
if check_cargo_toml {
// additionally check the contents of the cargo
let crate_version = self.crate_version();
let cargo_contents = self.generate_cargo_toml(name, version, crate_version)?;
check_file_in_dir(crate_path, "Cargo.toml", &cargo_contents)?;
}
self.ensure_consistent_bindings(crate_path.join("src"), true, single_file)?;
Ok(())
}
fn ensure_consistent_module(self, module: impl AsRef<Path>, single_file: bool) -> Result<()> {
self.ensure_consistent_bindings(module, false, single_file)?;
Ok(())
}
}
/// Generate the shared prefix of the `lib.rs` or `mod.rs`
fn generate_prefix(mut buf: impl Write, is_crate: bool, single_file: bool) -> Result<()> {
writeln!(buf, "#![allow(clippy::all)]")?;
writeln!(
buf,
"//! This {} contains abigen! generated bindings for solidity contracts.",
if is_crate { "lib" } else { "module" }
)?;
writeln!(buf, "//! This is autogenerated code.")?;
writeln!(buf, "//! Do not manually edit these files.")?;
writeln!(
buf,
"//! {} may be overwritten by the codegen system at any time.",
if single_file && !is_crate { "This file" } else { "These files" }
)?;
Ok(())
}
fn check_file_in_dir(dir: &Path, file_name: &str, expected_contents: &[u8]) -> Result<()> {
eyre::ensure!(dir.is_dir(), "Not a directory: {}", dir.display());
let file_path = dir.join(file_name);
eyre::ensure!(file_path.is_file(), "Not a file: {}", file_path.display());
let contents = fs::read(&file_path).expect("Unable to read file");
eyre::ensure!(contents == expected_contents, format!("The contents of `{}` do not match the expected output of the newest `ethers::Abigen` version.\
This indicates that the existing bindings are outdated and need to be generated again.", file_path.display()));
Ok(())
}
fn check_binding_in_dir(dir: &Path, binding: &ContractBindings) -> Result<()> {
let name = binding.module_filename();
let contents = binding.to_vec();
check_file_in_dir(dir, &name, &contents)?;
Ok(())
}
#[cfg(test)]
mod tests {
use super::*;
use crate::{ExcludeContracts, SelectContracts};
use ethers_solc::project_util::TempProject;
use std::{env, panic, path::PathBuf};
struct Context {
multi_gen: MultiAbigen,
mod_root: PathBuf,
}
fn run_test<T>(test: T)
where
T: FnOnce(&Context) + panic::UnwindSafe,
{
let crate_root = std::path::Path::new(&env!("CARGO_MANIFEST_DIR")).to_owned();
let console = Abigen::new(
"Console",
crate_root.join("../tests/solidity-contracts/console.json").display().to_string(),
)
.unwrap();
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));
result.unwrap()
}
#[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_find_ethers_dep() {
run_test(|context| {
let Context { multi_gen, mod_root } = context;
let single_file = true;
let mut inner = multi_gen.clone().build().unwrap().into_inner(single_file);
inner.root = Some(PathBuf::from("this does not exist"));
inner.write_to_module(mod_root, single_file).unwrap();
})
}
#[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, true)
.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, true)
.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, true)
.is_err();
// ensure inconsistent bindings are detected
assert!(result, "Inconsistent bindings wrongly approved");
})
}
#[test]
fn can_detect_inconsistent_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, true)
.is_err();
// ensure inconsistent bindings are detected
assert!(result, "Inconsistent bindings wrongly approved");
})
}
#[test]
fn does_not_generate_shared_types_if_empty() {
let gen = Abigen::new(
"Greeter",
r#"[
struct Inner {bool a;}
greet1() (uint256)
greet2(Inner inner) (string)
]"#,
)
.unwrap();
let tokens = MultiExpansion::new(vec![gen.expand().unwrap()]).expand_inplace().to_string();
assert!(!tokens.contains("mod __shared_types"));
}
#[test]
fn can_filter_abigen() {
let abi = Abigen::new(
"MyGreeter",
r#"[
greet() (string)
]"#,
)
.unwrap();
let mut gen = MultiAbigen::from_abigens(vec![abi]).with_filter(ContractFilter::All);
assert_eq!(gen.abigens.len(), 1);
gen.apply_filter(&SelectContracts::default().add_name("MyGreeter").into());
assert_eq!(gen.abigens.len(), 1);
gen.apply_filter(&ExcludeContracts::default().add_name("MyGreeter2").into());
assert_eq!(gen.abigens.len(), 1);
let filtered = gen.clone().with_filter(SelectContracts::default().add_name("MyGreeter2"));
assert!(filtered.abigens.is_empty());
let filtered = gen.clone().with_filter(ExcludeContracts::default().add_name("MyGreeter"));
assert!(filtered.abigens.is_empty());
let filtered =
gen.clone().with_filter(SelectContracts::default().add_pattern("MyGreeter2"));
assert!(filtered.abigens.is_empty());
let filtered =
gen.clone().with_filter(ExcludeContracts::default().add_pattern("MyGreeter"));
assert!(filtered.abigens.is_empty());
gen.push(
Abigen::new(
"MyGreeterTest",
r#"[
greet() (string)
]"#,
)
.unwrap(),
);
let filtered = gen.clone().with_filter(SelectContracts::default().add_pattern(".*Test"));
assert_eq!(filtered.abigens.len(), 1);
assert_eq!(filtered.abigens[0].contract_name, "MyGreeterTest");
let filtered = gen.clone().with_filter(ExcludeContracts::default().add_pattern(".*Test"));
assert_eq!(filtered.abigens.len(), 1);
assert_eq!(filtered.abigens[0].contract_name, "MyGreeter");
}
#[test]
fn can_deduplicate_types() {
let tmp = TempProject::dapptools().unwrap();
tmp.add_source(
"Greeter",
r#"
// SPDX-License-Identifier: MIT
pragma solidity >=0.8.0;
struct Inner {
bool a;
}
struct Stuff {
Inner inner;
}
contract Greeter1 {
function greet(Stuff calldata stuff) public pure returns (Stuff memory) {
return stuff;
}
}
contract Greeter2 {
function greet(Stuff calldata stuff) public pure returns (Stuff memory) {
return stuff;
}
}
"#,
)
.unwrap();
let _ = tmp.compile().unwrap();
let gen = MultiAbigen::from_json_files(tmp.artifacts_path()).unwrap();
let bindings = gen.build().unwrap();
let single_file_dir = tmp.root().join("single_bindings");
bindings.write_to_module(&single_file_dir, true).unwrap();
let single_file_mod = single_file_dir.join("mod.rs");
assert!(single_file_mod.exists());
let content = fs::read_to_string(&single_file_mod).unwrap();
assert!(content.contains("mod __shared_types"));
assert!(content.contains("pub struct Inner"));
assert!(content.contains("pub struct Stuff"));
// multiple files
let gen = MultiAbigen::from_json_files(tmp.artifacts_path()).unwrap();
let bindings = gen.build().unwrap();
let multi_file_dir = tmp.root().join("multi_bindings");
bindings.write_to_module(&multi_file_dir, false).unwrap();
let multi_file_mod = multi_file_dir.join("mod.rs");
assert!(multi_file_mod.exists());
let content = fs::read_to_string(&multi_file_mod).unwrap();
assert!(content.contains("pub mod shared_types"));
let greeter1 = multi_file_dir.join("greeter_1.rs");
assert!(greeter1.exists());
let content = fs::read_to_string(&greeter1).unwrap();
assert!(!content.contains("pub struct Inner"));
assert!(!content.contains("pub struct Stuff"));
let greeter2 = multi_file_dir.join("greeter_2.rs");
assert!(greeter2.exists());
let content = fs::read_to_string(&greeter2).unwrap();
assert!(!content.contains("pub struct Inner"));
assert!(!content.contains("pub struct Stuff"));
let shared_types = multi_file_dir.join("shared_types.rs");
assert!(shared_types.exists());
let content = fs::read_to_string(&shared_types).unwrap();
assert!(content.contains("pub struct Inner"));
assert!(content.contains("pub struct Stuff"));
}
#[test]
fn can_sanitize_reserved_words() {
let tmp = TempProject::dapptools().unwrap();
tmp.add_source(
"ReservedWords",
r#"
// SPDX-License-Identifier: MIT
pragma solidity >=0.8.0;
contract Mod {
function greet() public pure returns (uint256) {
return 1;
}
}
// from a gnosis contract
contract Enum {
enum Operation {Call, DelegateCall}
}
"#,
)
.unwrap();
let _ = tmp.compile().unwrap();
let gen = MultiAbigen::from_json_files(tmp.artifacts_path()).unwrap();
let bindings = gen.build().unwrap();
let single_file_dir = tmp.root().join("single_bindings");
bindings.write_to_module(&single_file_dir, true).unwrap();
let single_file_mod = single_file_dir.join("mod.rs");
assert!(single_file_mod.exists());
let content = fs::read_to_string(&single_file_mod).unwrap();
assert!(content.contains("pub mod mod_ {"));
assert!(content.contains("pub mod enum_ {"));
// multiple files
let gen = MultiAbigen::from_json_files(tmp.artifacts_path()).unwrap();
let bindings = gen.build().unwrap();
let multi_file_dir = tmp.root().join("multi_bindings");
bindings.write_to_module(&multi_file_dir, false).unwrap();
let multi_file_mod = multi_file_dir.join("mod.rs");
assert!(multi_file_mod.exists());
let content = fs::read_to_string(&multi_file_mod).unwrap();
assert!(content.contains("pub mod enum_;"));
assert!(content.contains("pub mod mod_;"));
let enum_ = multi_file_dir.join("enum_.rs");
assert!(enum_.exists());
let content = fs::read_to_string(&enum_).unwrap();
assert!(content.contains("pub mod enum_ {"));
let mod_ = multi_file_dir.join("mod_.rs");
assert!(mod_.exists());
let content = fs::read_to_string(&mod_).unwrap();
assert!(content.contains("pub mod mod_ {"));
}
#[test]
fn parse_ethers_crate() {
// gotta bunch these all together as we are overwriting env vars
run_test(|context| {
let Context { multi_gen, mod_root } = context;
let tmp = TempProject::dapptools().unwrap();
tmp.add_source(
"Cargo.toml",
r#"
[package]
name = "ethers-contract"
version = "1.0.0"
edition = "2018"
rust-version = "1.64"
authors = ["Georgios Konstantopoulos <me@gakonst.com>"]
license = "MIT OR Apache-2.0"
description = "Smart contract bindings for the ethers-rs crate"
homepage = "https://docs.rs/ethers"
repository = "https://github.com/gakonst/ethers-rs"
keywords = ["ethereum", "web3", "celo", "ethers"]
[dependencies]
ethers-providers = { version = "^1.0.0", path = "../ethers-providers", default-features = false }
"#,
)
.unwrap();
let _ = tmp.compile().unwrap();
env::set_var("CARGO_MANIFEST_DIR", tmp.root());
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, true)
.expect("Inconsistent bindings");
});
run_test(|context| {
let Context { multi_gen, mod_root } = context;
let tmp = TempProject::dapptools().unwrap();
tmp.add_source(
"Cargo.toml",
r#"
[package]
name = "ethers-contract"
version = "1.0.0"
edition = "2018"
rust-version = "1.64"
authors = ["Georgios Konstantopoulos <me@gakonst.com>"]
license = "MIT OR Apache-2.0"
description = "Smart contract bindings for the ethers-rs crate"
homepage = "https://docs.rs/ethers"
repository = "https://github.com/gakonst/ethers-rs"
keywords = ["ethereum", "web3", "celo", "ethers"]
[dependencies]
ethers-contracts = "0.4.0"
"#,
)
.unwrap();
let _ = tmp.compile().unwrap();
env::set_var("CARGO_MANIFEST_DIR", tmp.root());
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, true)
.expect("Inconsistent bindings");
});
run_test(|context| {
let Context { multi_gen, mod_root } = context;
let tmp = TempProject::dapptools().unwrap();
tmp.add_source(
"Cargo.toml",
r#"
[package]
name = "ethers-contract"
version = "1.0.0"
edition = "2018"
rust-version = "1.64"
authors = ["Georgios Konstantopoulos <me@gakonst.com>"]
license = "MIT OR Apache-2.0"
description = "Smart contract bindings for the ethers-rs crate"
homepage = "https://docs.rs/ethers"
repository = "https://github.com/gakonst/ethers-rs"
keywords = ["ethereum", "web3", "celo", "ethers"]
[dependencies]
ethers = {git="https://github.com/gakonst/ethers-rs", rev = "fd8ebf5",features = ["ws", "rustls", "ipc"] }
"#,
)
.unwrap();
let _ = tmp.compile().unwrap();
env::set_var("CARGO_MANIFEST_DIR", tmp.root());
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, true)
.expect("Inconsistent bindings");
});
run_test(|context| {
let Context { multi_gen, mod_root } = context;
let tmp = TempProject::dapptools().unwrap();
tmp.add_source(
"Cargo.toml",
r#"
[package]
name = "ethers-contract"
version = "1.0.0"
edition = "2018"
rust-version = "1.64"
authors = ["Georgios Konstantopoulos <me@gakonst.com>"]
license = "MIT OR Apache-2.0"
description = "Smart contract bindings for the ethers-rs crate"
homepage = "https://docs.rs/ethers"
repository = "https://github.com/gakonst/ethers-rs"
keywords = ["ethereum", "web3", "celo", "ethers"]
[dependencies]
ethers = {git="https://github.com/gakonst/ethers-rs" ,features = ["ws", "rustls", "ipc"] }
"#,
)
.unwrap();
let _ = tmp.compile().unwrap();
env::set_var("CARGO_MANIFEST_DIR", tmp.root());
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, true)
.expect("Inconsistent bindings");
});
}
}