Not hard issue, we need implement Sha256 double hashing. U can watch how it implemented in [rust](https://github.com/rust-bitcoin/rust-bitcoin/blob/0123f2894c66419f1ad561e9e7d98af66c4db9ab/hashes/src/sha256d.rs). Expecting from PR: * Do it in zig style (u can watch std.crypto.hash.sha2., or ripemd160 in this library). * Tests (u can take it from rust impl)
Not hard issue, we need implement Sha256 double hashing.
U can watch how it implemented in rust.
Expecting from PR: