Crate uhash_core 

uhash-core

UniversalHash v4 — democratic proof-of-work hash engine.

Primary API

• hash — one-shot hash function
• UniversalHash — reusable hasher (avoids re-allocation)
• meets_difficulty / verify — proof verification
• build_input / challenge_input — challenge utilities

no_std Support

This crate supports no_std environments with the alloc crate:

[dependencies]
uhash-core = { version = "0.3", default-features = false }

Structs

UniversalHash

UniversalHash v4 hasher

Constants

AES_BLOCK_SIZE

AES block size

BLAKE3_SIZE

BLAKE3 output size

BLOCKS_PER_SCRATCHPAD

Number of blocks per scratchpad

BLOCK_SIZE

Block size in bytes for memory operations

CHAINS

Number of parallel computation chains

ROUNDS

Number of rounds per chain (spec: 12,288)

SCRATCHPAD_SIZE

Scratchpad size per chain in bytes (512 KB)

SHA256_SIZE

SHA-256 output size

TOTAL_MEMORY

Total memory footprint (2 MB)

VERSION

Algorithm version

Functions

build_input

Build PoW input bytes from a challenge header and nonce.

challenge_input

Build PoW input from a typed Challenge and nonce.

encode_difficulty

Encode a difficulty as leading zero bit count.

hash

Convenience function for single-shot hashing

meets_difficulty

Check if a hash meets the required difficulty (leading zero bits).

verify

Verify a proof: recompute hash and check difficulty.