├── rust-toolchain ├── .gitignore ├── .editorconfig ├── demo ├── build.sh ├── Cargo.toml └── src │ └── demo.rs ├── src ├── logger.rs ├── crypto.rs ├── types.rs ├── lib.rs └── panic.rs ├── alloc ├── src │ └── lib.rs ├── README.md └── Cargo.toml ├── libc ├── README.md ├── Cargo.toml └── src │ └── lib.rs ├── LICENSE-MIT ├── Cargo.toml ├── README.md ├── .travis.yml └── LICENSE-APACHE /rust-toolchain: -------------------------------------------------------------------------------- 1 | nightly-2019-03-05 2 | -------------------------------------------------------------------------------- /.gitignore: -------------------------------------------------------------------------------- 1 | /target/ 2 | **/*.rs.bk 3 | Cargo.lock 4 | **/target 5 | **/.DS_Store -------------------------------------------------------------------------------- /.editorconfig: -------------------------------------------------------------------------------- 1 | root = true 2 | [*] 3 | indent_style=tab 4 | indent_size=tab 5 | tab_width=4 6 | end_of_line=lf 7 | charset=utf-8 8 | trim_trailing_whitespace=true 9 | max_line_length=120 10 | insert_final_newline=true 11 | 12 | -------------------------------------------------------------------------------- /demo/build.sh: -------------------------------------------------------------------------------- 1 | #!/bin/sh 2 | 3 | set -e 4 | 5 | # Requires wasm-build util, see https://github.com/paritytech/wasm-utils to install 6 | 7 | cargo build --release --verbose --target wasm32-unknown-unknown 8 | wasm-build --target wasm32-unknown-unknown ./target wasm_demo 9 | -------------------------------------------------------------------------------- /src/logger.rs: -------------------------------------------------------------------------------- 1 | //! Logger extensions for pwasm-std 2 | mod external { 3 | extern { 4 | pub fn debug(str_ptr: *const u8, str_len: u32); 5 | } 6 | } 7 | 8 | /// Log debug message to the runtime 9 | pub fn debug(msg: &str) { 10 | unsafe { external::debug(msg.as_ptr(), msg.len() as u32); } 11 | } 12 | -------------------------------------------------------------------------------- /demo/Cargo.toml: -------------------------------------------------------------------------------- 1 | [package] 2 | name = "wasm-demo" 3 | version = "0.0.0" 4 | authors = ["NikVolf "] 5 | 6 | [dependencies] 7 | pwasm-std = { path = "../" } 8 | 9 | [lib] 10 | path = "src/demo.rs" 11 | crate-type = ["cdylib"] 12 | 13 | [profile.release] 14 | panic = "abort" 15 | lto = true 16 | -------------------------------------------------------------------------------- /demo/src/demo.rs: -------------------------------------------------------------------------------- 1 | #![no_std] 2 | 3 | #[macro_use] extern crate pwasm_std; 4 | 5 | #[no_mangle] 6 | pub fn call() { 7 | pwasm_std::logger::debug("Returing hash of 'something'"); 8 | let hash = pwasm_std::keccak("something"); 9 | 10 | pwasm_std::logger::debug(&format!("{:?}", hash.as_bytes())); 11 | } 12 | -------------------------------------------------------------------------------- /alloc/src/lib.rs: -------------------------------------------------------------------------------- 1 | #![warn(missing_docs)] 2 | #![cfg_attr(feature = "strict", deny(warnings))] 3 | #![no_std] 4 | #![crate_type = "rlib"] 5 | #![feature(allocator_api)] 6 | 7 | //! Custom allocator crate for wasm 8 | 9 | extern crate wee_alloc; 10 | 11 | #[global_allocator] 12 | static ALLOC: wee_alloc::WeeAlloc = wee_alloc::WeeAlloc::INIT; 13 | -------------------------------------------------------------------------------- /alloc/README.md: -------------------------------------------------------------------------------- 1 | # pwasm-alloc 2 | 3 | Parity WASM contracts standard library allocator 4 | 5 | [Documentation](https://paritytech.github.io/pwasm-std/pwasm_alloc/) 6 | 7 | # License 8 | 9 | `pwasm_alloc` is primarily distributed under the terms of both the MIT 10 | license and the Apache License (Version 2.0), at your choice. 11 | 12 | See LICENSE-APACHE, and LICENSE-MIT for details. 13 | -------------------------------------------------------------------------------- /libc/README.md: -------------------------------------------------------------------------------- 1 | # pwasm-libc 2 | 3 | Parity WASM contracts standard library libc bindings 4 | 5 | [Documentation](https://paritytech.github.io/pwasm-std/pwasm_libc/) 6 | 7 | # License 8 | 9 | `pwasm-libc` is primarily distributed under the terms of both the MIT 10 | license and the Apache License (Version 2.0), at your choice. 11 | 12 | See LICENSE-APACHE, and LICENSE-MIT for details. 13 | -------------------------------------------------------------------------------- /alloc/Cargo.toml: -------------------------------------------------------------------------------- 1 | [package] 2 | name = "pwasm-alloc" 3 | version = "0.4.1" 4 | authors = ["Nikolay Volf "] 5 | license = "MIT/Apache-2.0" 6 | readme = "README.md" 7 | repository = "https://github.com/paritytech/pwasm-std" 8 | homepage = "https://github.com/paritytech/pwasm-std" 9 | documentation = "https://paritytech.github.io/pwasm-std/pwasm_std/" 10 | description = "Parity WebAssembly standard library internal allocator" 11 | keywords = ["wasm", "parity", "webassembly", "blockchain"] 12 | categories = ["no-std", "embedded"] 13 | 14 | [dependencies] 15 | wee_alloc = "0.4" 16 | 17 | [features] 18 | strict = [] 19 | -------------------------------------------------------------------------------- /libc/Cargo.toml: -------------------------------------------------------------------------------- 1 | [package] 2 | name = "pwasm-libc" 3 | version = "0.2.1" 4 | authors = ["Sergey Pepyakin "] 5 | license = "MIT/Apache-2.0" 6 | readme = "README.md" 7 | repository = "https://github.com/paritytech/pwasm-std" 8 | homepage = "https://github.com/paritytech/pwasm-std" 9 | documentation = "https://paritytech.github.io/pwasm-std/pwasm_std/" 10 | description = "Parity WebAssembly standard library libc bindings" 11 | keywords = ["wasm", "parity", "webassembly", "blockchain"] 12 | categories = ["no-std", "embedded"] 13 | 14 | [dependencies] 15 | cfg-if = "0.1" 16 | 17 | [features] 18 | strict = [] 19 | ext_memops = [] 20 | -------------------------------------------------------------------------------- /src/crypto.rs: -------------------------------------------------------------------------------- 1 | use tiny_keccak::Keccak; 2 | use types::H256; 3 | 4 | /// Compute keccak hash. 5 | /// 6 | /// # Examples 7 | /// 8 | /// ```rust 9 | /// use pwasm_std::{keccak, types}; 10 | /// 11 | /// let hash = keccak("hello world".as_bytes()); 12 | /// 13 | /// let expected = types::H256::from([ 14 | /// 71, 23, 50, 133, 168, 215, 52, 30, 15 | /// 94, 151, 47, 198, 119, 40, 99, 132, 16 | /// 248, 2, 248, 239, 66, 165, 236, 95, 17 | /// 3, 187, 250, 37, 76, 176, 31, 173 18 | /// ]); 19 | /// 20 | /// assert_eq!(hash, expected); 21 | /// ``` 22 | pub fn keccak(input: T) -> H256 23 | where 24 | T: AsRef<[u8]> 25 | { 26 | let mut keccak = Keccak::new_keccak256(); 27 | let mut res = H256::zero(); 28 | keccak.update(input.as_ref()); 29 | keccak.finalize(res.as_bytes_mut()); 30 | res 31 | } 32 | -------------------------------------------------------------------------------- /LICENSE-MIT: -------------------------------------------------------------------------------- 1 | Copyright (c) 2017 Nikolay Volf 2 | 3 | Permission is hereby granted, free of charge, to any 4 | person obtaining a copy of this software and associated 5 | documentation files (the "Software"), to deal in the 6 | Software without restriction, including without 7 | limitation the rights to use, copy, modify, merge, 8 | publish, distribute, sublicense, and/or sell copies of 9 | the Software, and to permit persons to whom the Software 10 | is furnished to do so, subject to the following 11 | conditions: 12 | 13 | The above copyright notice and this permission notice 14 | shall be included in all copies or substantial portions 15 | of the Software. 16 | 17 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF 18 | ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED 19 | TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A 20 | PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT 21 | SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY 22 | CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION 23 | OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR 24 | IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 25 | DEALINGS IN THE SOFTWARE. 26 | -------------------------------------------------------------------------------- /Cargo.toml: -------------------------------------------------------------------------------- 1 | [package] 2 | name = "pwasm-std" 3 | version = "0.13.1" 4 | authors = ["Nikolay Volf ", "Sergey Shulepov "] 5 | license = "MIT/Apache-2.0" 6 | readme = "README.md" 7 | repository = "https://github.com/paritytech/pwasm-std" 8 | homepage = "https://github.com/paritytech/pwasm-std" 9 | documentation = "https://paritytech.github.io/pwasm-std/pwasm_std/" 10 | description = "Parity WebAssembly standard library for contract development" 11 | keywords = ["wasm", "parity", "webassembly", "blockchain"] 12 | categories = ["no-std", "embedded"] 13 | exclude = [ "demo/*" ] 14 | 15 | [dependencies] 16 | fixed-hash = { version = "0.3.0", default-features = false } 17 | uint = { version = "0.5.0", default-features = false } 18 | byteorder = { version = "1", default-features = false } 19 | pwasm-alloc = { path = "alloc", version = "0.4" } 20 | pwasm-libc = { path = "libc", version = "0.2" } 21 | tiny-keccak = "1" 22 | 23 | [features] 24 | default = ["uint/common"] 25 | std = ["fixed-hash/std", "uint/std", "byteorder/std"] 26 | strict = ["pwasm-libc/strict", "pwasm-alloc/strict"] 27 | test = ["std", "strict"] 28 | panic_with_msg = [] 29 | -------------------------------------------------------------------------------- /src/types.rs: -------------------------------------------------------------------------------- 1 | //! Provides primitive fixed size hash types. 2 | 3 | // Constructed via `fixed_hash` crate macro. 4 | 5 | pub use uint::U256; 6 | 7 | construct_fixed_hash!{ 8 | /// A 160 bits (20 bytes) hash type. 9 | /// 10 | /// # Note 11 | /// 12 | /// Can be interchanged with `Address` 13 | pub struct H160(20); 14 | } 15 | 16 | construct_fixed_hash!{ 17 | /// A 256-bits (32 bytes) hash type. 18 | pub struct H256(32); 19 | } 20 | 21 | // Auto-impl `From` conversions between `H256` and `H160`. 22 | impl_fixed_hash_conversions!(H256, H160); 23 | 24 | /// Represents an address in ethereum context. 25 | /// 26 | /// # Note 27 | /// 28 | /// Addresses have 160 bytes length. 29 | pub type Address = H160; 30 | 31 | impl From for H256 { 32 | fn from(uint: U256) -> H256 { 33 | let mut hash = H256::zero(); 34 | uint.to_big_endian(hash.as_bytes_mut()); 35 | hash 36 | } 37 | } 38 | 39 | impl<'a> From<&'a U256> for H256 { 40 | fn from(uint: &'a U256) -> H256 { 41 | let mut hash: H256 = H256::zero(); 42 | uint.to_big_endian(hash.as_bytes_mut()); 43 | hash 44 | } 45 | } 46 | 47 | impl From for U256 { 48 | fn from(hash: H256) -> U256 { 49 | U256::from(hash.as_bytes()) 50 | } 51 | } 52 | 53 | impl<'a> From<&'a H256> for U256 { 54 | fn from(hash: &'a H256) -> U256 { 55 | U256::from(hash.as_bytes()) 56 | } 57 | } 58 | -------------------------------------------------------------------------------- /libc/src/lib.rs: -------------------------------------------------------------------------------- 1 | #![warn(missing_docs)] 2 | #![cfg_attr(feature = "strict", deny(warnings))] 3 | #![no_std] 4 | 5 | //! libc crate 6 | 7 | #[macro_use] 8 | extern crate cfg_if; 9 | 10 | cfg_if! { 11 | if #[cfg(feature="ext_memops")] { 12 | extern "C" { 13 | fn ext_memcmp(cx: *const u8, ct: *const u8, n: usize) -> i32; 14 | fn ext_memcpy(dest: *mut u8, src: *const u8, n: usize) -> *mut u8; 15 | fn ext_memmove(dest: *mut u8, src: *const u8, n: usize) -> *mut u8; 16 | fn ext_memset(dest: *mut u8, c: i32, n: usize) -> *mut u8; 17 | } 18 | 19 | // Declaring these function here prevents Emscripten from including it's own verisons 20 | // into final binary. 21 | 22 | /// memcmp extern 23 | #[no_mangle] 24 | pub unsafe extern "C" fn memcmp(cx: *const u8, ct: *const u8, n: usize) -> i32 { 25 | ext_memcmp(cx, ct, n) 26 | } 27 | 28 | /// memcpy extern 29 | #[no_mangle] 30 | pub unsafe extern "C" fn memcpy(dest: *mut u8, src: *const u8, n: usize) -> *mut u8 { 31 | ext_memcpy(dest, src, n) 32 | } 33 | 34 | /// memmove extern 35 | #[no_mangle] 36 | pub unsafe extern "C" fn memmove(dest: *mut u8, src: *const u8, n: usize) -> *mut u8 { 37 | ext_memmove(dest, src, n) 38 | } 39 | 40 | /// memset extern 41 | #[no_mangle] 42 | pub unsafe extern "C" fn memset(dest: *mut u8, c: i32, n: usize) -> *mut u8 { 43 | ext_memset(dest, c, n) 44 | } 45 | } 46 | } 47 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # pwasm-std 2 | 3 | Parity WASM contracts standard library for Rust 4 | 5 | [![Build Status](https://travis-ci.org/paritytech/pwasm-std.svg?branch=master)](https://travis-ci.org/paritytech/pwasm-std) 6 | 7 | [Documentation](https://paritytech.github.io/pwasm-std/pwasm_std/) 8 | 9 | `pwasm-std` is a limited subset of the Rust standard library, along with a custom allocator which delegates the allocation to the runtime-defined externs. 10 | 11 | ## Use 12 | 13 | Just add a dependency 14 | ```toml 15 | [dependencies] 16 | pwasm-std = "0.13" 17 | ``` 18 | 19 | Test `pwasm-std` with 20 | 21 | ``` 22 | cargo test --features=test 23 | ``` 24 | 25 | The crate is supposed to be used on nightly Rust only, until the custom allocator api stablizes in Rust. 26 | 27 | ## no_std 28 | 29 | `pwasm-std` is itself compiled with no_std and expected to be used within no_std-crates/binaries, since it defines `lang_item`-s on it's own, which will conflict with standard library. 30 | 31 | But for test scenarios it can be compiled with feature "std" and auxiliary crate "pwasm-test" to support testing of contracts' internal logic. 32 | 33 | # License 34 | 35 | `pwasm-std` is primarily distributed under the terms of both the MIT 36 | license and the Apache License (Version 2.0), at your choice. 37 | 38 | See LICENSE-APACHE, and LICENSE-MIT for details. 39 | 40 | ### Contribution 41 | 42 | Unless you explicitly state otherwise, any contribution intentionally submitted 43 | for inclusion in pwasm-std by you, as defined in the Apache-2.0 license, shall be 44 | dual licensed as above, without any additional terms or conditions. 45 | -------------------------------------------------------------------------------- /.travis.yml: -------------------------------------------------------------------------------- 1 | language: rust 2 | rust: 3 | - nightly 4 | install: 5 | - rustup target add wasm32-unknown-unknown 6 | - cargo install --git https://github.com/paritytech/wasm-utils --bin wasm-build 7 | script: 8 | - cargo test --features test 9 | - cargo check --target wasm32-unknown-unknown --verbose --features strict 10 | - cargo check --target wasm32-unknown-unknown --verbose --features strict,panic_with_msg 11 | - cargo check --verbose --features strict,std,panic_with_msg 12 | - cd demo && ./build.sh 13 | - cd .. 14 | after_success: | 15 | [ $TRAVIS_BRANCH = master ] && 16 | [ $TRAVIS_PULL_REQUEST = false ] && 17 | cargo doc --all --no-deps && 18 | echo '' > target/doc/index.html && 19 | pip install --user ghp-import && 20 | /home/travis/.local/bin/ghp-import -n target/doc && 21 | git push -fq https://${TOKEN}@github.com/${TRAVIS_REPO_SLUG}.git gh-pages 22 | env: 23 | global: 24 | - secure: 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 25 | -------------------------------------------------------------------------------- /src/lib.rs: -------------------------------------------------------------------------------- 1 | //! Standard library for parity wasm programs 2 | 3 | #![cfg_attr(not(feature = "std"), no_std)] 4 | #![cfg_attr(feature = "strict", deny(warnings))] 5 | #![feature(lang_items)] 6 | #![feature(link_args)] 7 | #![feature(alloc)] 8 | #![feature(core_intrinsics)] 9 | #![feature(panic_info_message)] 10 | 11 | #![warn(missing_docs)] 12 | 13 | #[cfg(feature = "std")] 14 | extern crate core; 15 | 16 | #[cfg(not(feature = "std"))] 17 | extern crate pwasm_alloc; 18 | 19 | #[cfg(not(feature = "std"))] 20 | extern crate pwasm_libc; 21 | 22 | #[allow(unused)] 23 | #[macro_use] 24 | extern crate alloc; 25 | pub use alloc::{vec, format}; 26 | 27 | extern crate byteorder; 28 | 29 | #[macro_use] 30 | extern crate fixed_hash; 31 | 32 | extern crate uint; 33 | 34 | extern crate tiny_keccak; 35 | 36 | use byteorder::{LittleEndian, ByteOrder}; 37 | 38 | pub use alloc::boxed::Box; 39 | pub use alloc::string::String; 40 | pub use alloc::str; 41 | pub use alloc::vec::Vec; 42 | 43 | pub mod types; 44 | 45 | // Safe wrapper around debug logging 46 | pub mod logger; 47 | 48 | // Crypto functions 49 | mod crypto; 50 | 51 | mod panic; 52 | 53 | #[no_mangle] 54 | #[cfg(not(feature = "std"))] 55 | pub use panic::panic_fmt; 56 | 57 | #[no_mangle] 58 | #[cfg(not(feature = "std"))] 59 | pub use panic::oom; 60 | 61 | pub use crypto::keccak; 62 | 63 | /// Read u32 using native endianness 64 | pub fn read_u32(slc: &[u8]) -> u32 { 65 | LittleEndian::read_u32(slc) 66 | } 67 | 68 | /// Write u32 using native endianness 69 | pub fn write_u32(dst: &mut [u8], val: u32) { 70 | LittleEndian::write_u32(dst, val) 71 | } 72 | 73 | /// Write ptr using native endianness 74 | pub fn write_ptr(dst: &mut [u8], ptr: *mut u8) { 75 | // todo: consider: add assert that arch is 32bit 76 | write_u32(dst, ptr as usize as u32); 77 | } 78 | 79 | /// Read u64 using native endianness 80 | pub fn read_u64(slc: &[u8]) -> u64 { 81 | LittleEndian::read_u64(slc) 82 | } 83 | 84 | /// Write u64 using native endianness 85 | pub fn write_u64(dst: &mut [u8], val: u64) { 86 | LittleEndian::write_u64(dst, val) 87 | } 88 | -------------------------------------------------------------------------------- /src/panic.rs: -------------------------------------------------------------------------------- 1 | #![cfg(not(feature = "std"))] 2 | 3 | extern "C" { 4 | fn panic(payload_ptr: *const u8, payload_len: u32) -> !; 5 | } 6 | 7 | /// Overrides the default panic_fmt 8 | #[cfg(not(feature = "panic_with_msg"))] 9 | #[no_mangle] 10 | #[panic_handler] 11 | pub fn panic_fmt(_info: &crate::core::panic::PanicInfo) -> ! { 12 | unsafe { 13 | panic(crate::core::ptr::null(), 0u32); 14 | } 15 | } 16 | 17 | /// Overrides the default panic_fmt 18 | #[cfg(feature = "panic_with_msg")] 19 | #[no_mangle] 20 | #[panic_handler] 21 | pub fn panic_fmt(info: &crate::core::panic::PanicInfo) -> ! { 22 | use crate::Vec; 23 | use byteorder::{LittleEndian, ByteOrder}; 24 | 25 | struct Sink { 26 | buf: Vec, 27 | pos: usize 28 | } 29 | 30 | impl Sink { 31 | #[inline(always)] 32 | fn new(capacity: usize) -> Sink { 33 | let mut buf = Vec::with_capacity(capacity); 34 | buf.resize(capacity, 0); 35 | Sink { 36 | buf: buf, 37 | pos: 0, 38 | } 39 | } 40 | 41 | #[inline(always)] 42 | fn reserve(&mut self, len: usize) -> &mut [u8] { 43 | let dst = &mut self.buf[self.pos..self.pos+len]; 44 | self.pos += len; 45 | dst 46 | } 47 | 48 | #[inline(always)] 49 | fn write_u32(&mut self, val: u32) { 50 | LittleEndian::write_u32(self.reserve(4), val); 51 | } 52 | 53 | #[inline(always)] 54 | fn write_str(&mut self, bytes: &[u8]) { 55 | self.write_u32(bytes.len() as u32); 56 | self.reserve(bytes.len()).copy_from_slice(bytes) 57 | } 58 | } 59 | 60 | impl crate::core::ops::Deref for Sink { 61 | type Target = [u8]; 62 | fn deref(&self) -> &[u8] { 63 | &self.buf 64 | } 65 | } 66 | 67 | let msg = if let Some(fmt) = info.message() { 68 | format!("{}", fmt) 69 | } else { 70 | Default::default() 71 | }; 72 | let (file, line, col) = if let Some(loc) = info.location() { 73 | (loc.file(), loc.line(), loc.column()) 74 | } else { 75 | ("", 0, 0) 76 | }; 77 | 78 | let mut sink = Sink::new( 79 | 4 + msg.as_bytes().len() + // len + [msg] 80 | 4 + file.as_bytes().len() + // len + [file] 81 | 4 + // line 82 | 4 // col 83 | ); 84 | sink.write_str(msg.as_bytes()); 85 | sink.write_str(file.as_bytes()); 86 | sink.write_u32(line); 87 | sink.write_u32(col); 88 | 89 | unsafe { 90 | panic(sink.as_ptr(), sink.len() as u32) 91 | } 92 | } 93 | 94 | #[lang = "eh_personality"] 95 | extern "C" fn eh_personality() {} 96 | 97 | /// Overrides the default oom 98 | #[lang = "oom"] 99 | #[no_mangle] 100 | pub extern fn oom(_: crate::core::alloc::Layout) -> ! 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