Based on https://www.shawntabrizi.com/substrate-js-utilities/ and https://github.com/hack-ink/subalfred, adds a simple hash command as an additional utility to the CLI. It is feature gated behind experimental for now. It supports all the hashers typically used by the SDK (blake2, keccack, sha2, twox), without taking on any new dependencies.

Installation

cargo install --path ./crates/pop-cli --locked --features experimental

Usage

There is a subcommand for each supported hasher, which expects the required length of the output along with input data in the form of a string, hex or path to a file to be hashed. The command structure is intended to be as simple as possible, whilst also allowing easier future extensibility. Whilst the commands could be combined with the output length (e.g. keccak-256), its the same amount of characters to type and providing the length separately makes it more natural in terms of how a hasher works imo. Possible values for length are included in --help.

Some of the commands also support an additional --concat option which can be used for storage key hashing.

pop hash blake2 256 ./runtime.wasm
pop hash twox 128 some_text
pop hash keccak 256 0x68656c6c6f

TODOs:

• potentially include the length, in bytes, with the output
• docs - a separate pr to add to pop-docs once approved
• tests

[sc-3512]