eos - 无法理解这些功能的使用

Question

我正在阅读一份智能合约，并遇到了这些功能。我无法理解它。有人可以解释这些功能的作用吗？

uECC_decompress()
rhash_keccak_256_init()
rhash_keccak_update()
rhash_keccak_final()

Answer 1

It sounds like you must have been reading either the eosio.unregd or eosio.lost contracts.

• uECC_decompress: Decompress a compressed public key
• rhash_keccak_256_init(), rhash_keccak_update(), rhash_keccak_final(): initialize, add data to, and compute a Keccak256 hash.

EDIT: Neither of these are a part of CDT. They are external libraries pulled into the project. Check the ecc folder in both to see the implementations.