Address PR review feedback: spelling fixes, test coverage, and non-consuming TryInto

[Copilot]

Addresses review feedback from PR #32 to improve code quality and API ergonomics.

Spelling corrections:

• Fixed typos in comments: retured → returned, therfore → therefore, retieve → retrieve

API improvement:

• Changed TryInto<EthAddress> to implement for &Address instead of Address, preventing ownership transfer:

// Before: consumed the address
let eth_addr: EthAddress = cosmos_addr.try_into()?;  // cosmos_addr moved

// After: borrows the address
let eth_addr: EthAddress = (&cosmos_addr).try_into()?;  // cosmos_addr still usable

Test coverage:

• Added test_get_txhash to verify SHA256 hash computation
• Added test_trait_conversions for TryInto<EthAddress> and From<EthAddress> roundtrip
• Added test_re_prefix to validate prefix changes preserve underlying bytes

---

✨ Let Copilot coding agent set things up for you — coding agent works faster and does higher quality work when set up for your repo.

[Copilot]

Just as a heads up, I was blocked by some firewall rules while working on your feedback. Expand below for details.

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• gravitychain.io
  • Triggering command: /home/REDACTED/work/deep_space/deep_space/target/debug/deps/deep_space-f3ba4be92f2b6ea4 /home/REDACTED/work/deep_space/deep_space/target/debug/deps/deep_space-f3ba4be92f2b6ea4 -I depend/secp256k1/ -I depend/secp256k1/include -I depend/secp256k1/src -Wall -Wextra -Wno-unused-function -Wno-unused-parameter -DSECP256K1_API= ebug�� 7924265c4/out/fce6141bfa9bf74c-precomputed_ecmult.o -8f1e3becb5539c4-mtune=generic te-591f8e5905d6c-march=x86-64 c_macro2-5dfff39cc code_ident-4fec1-O0 lib/rustlib/x86_-ffunction-sections lib/rustlib/x86_-fdata-sections (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)