Collection of WASM utilities used in Parity and WASM contract development
Build tools for cargo
Easiest way to use is to install via
cargo install pwasm-utils-cli --bin wasm-build
Symbols pruning (wasm-prune)
cargo install pwasm-utils-cli --bin wasm-prune wasm-prune <input_wasm_binary.wasm> <output_wasm_binary.wasm>
This will optimize WASM symbols tree to leave only those elements that are used by contract
call function entry.
Gas counter (wasm-gas)
For development puposes, raw WASM contract can be injected with gas counters (the same way as it done by Parity runtime when running contracts)
cargo install pwasm-utils-cli --bin wasm-gas wasm-gas <input_wasm_binary.wasm> <output_wasm_binary.wasm>
Parity WASM runtime provides some library functions that can be commonly found in libc. WASM binary size can be reduced and performance may be improved if these functions are used. This utility scans for invocations of the following functions inside the WASM binary:
And then substitutes them with invocations of the imported ones. Should be run before
wasm-opt for better results.
cargo install pwasm-utils-cli --bin wasm-ext wasm-ext <input_wasm_binary.wasm> <output_wasm_binary.wasm>
All executables use corresponding api methods of the root crate and can be combined in other build tools.
wasm-utils is primarily distributed under the terms of both the MIT
license and the Apache License (Version 2.0), at your choice.
See LICENSE-APACHE, and LICENSE-MIT for details.
Unless you explicitly state otherwise, any contribution intentionally submitted
for inclusion in
wasm-utils by you, as defined in the Apache-2.0 license, shall be
dual licensed as above, without any additional terms or conditions.