Add Ethereum transaction ID handling utility

[Copilot]

Implements a Python module for validating, normalizing, formatting, and extracting Ethereum transaction IDs (32-byte hex hashes).

Changes

• transaction_id.py — Core logic:

  • is_valid_transaction_id — validates 0x + 64 hex chars format
  • normalize_transaction_id — adds missing 0x prefix, lowercases
  • format_transaction_id — full or shortened (0xabcdef...123456) display
  • parse_transaction_ids — extracts all unique valid IDs from arbitrary text

• test_transaction_id.py — 26 unit tests covering validation, normalization, deduplication, case folding, and edge cases

• README.md — Documents the utility with usage examples

• .gitignore — Standard Python exclusions (__pycache__, *.pyc, etc.)

Example

from transaction_id import is_valid_transaction_id, format_transaction_id, parse_transaction_ids

tx = "0xDEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEF"

is_valid_transaction_id(tx)          # True
format_transaction_id(tx, short=True)  # "0xdeadbe...adbeef"

text = "sent via 0xabc123...def456 and 0xfeed00...cafe11"
parse_transaction_ids(text)          # [normalized list of unique IDs found]

[Copilot]

Pull request overview

Adds a small Python utility module for working with Ethereum transaction IDs (tx hashes), plus tests and documentation.

Changes:

• Introduces transaction_id.py with validation, normalization, formatting, and extraction helpers (plus a CLI demo entrypoint).
• Adds test_transaction_id.py unit tests for core behaviors (validation/normalization/formatting/parsing).
• Documents usage in README.md and adds a Python-focused .gitignore.

Reviewed changes

Copilot reviewed 3 out of 4 changed files in this pull request and generated 6 comments.

File	Description
transaction_id.py	Implements tx hash validate/normalize/format/parse helpers and a CLI demo.
test_transaction_id.py	Adds unittest coverage for the helper functions.
README.md	Documents the new utility and provides usage examples.
.gitignore	Adds standard Python/venv/IDE/OS ignore patterns.

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[Copilot]

The parsing example uses placeholders like "tx1=0x... tx2=0x...", but parse_transaction_ids only extracts full 32-byte transaction hashes (no ellipses/short forms). Update the example to include full-length IDs or clarify the supported input formats.

Suggested change

	parse_transaction_ids("tx1=0x... tx2=0x...")
	parse_transaction_ids(
	"tx1=0xabc123def456abc123def456abc123def456abc123def456abc123def456abc1 "
	"tx2=0xdef456abc123def456abc123def456abc123def456abc123def456abc123def4"
	)

[Copilot]

Consider adding a test that parse_transaction_ids extracts IDs with an uppercase 0X prefix (and normalizes them), plus a boundary case where a valid 66-char ID is immediately followed by another hex character (to avoid greedy-match failures). This will lock in the intended extraction behavior.

[Copilot]

open(file_path, 'r') relies on the platform default encoding. Specify an explicit encoding (e.g., UTF-8) for consistent behavior across environments.

Suggested change

	with open(file_path, 'r') as f:
	with open(file_path, 'r', encoding='utf-8') as f:

[Darliewithrow]

Cloned Darliewithrow/documentation and checked out branch copilot/check-previous-step-changes

[Darliewithrow]

from transaction_id import is_valid_transaction_id, format_transaction_id, parse_transaction_ids

tx = "0xDEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEF"

is_valid_transaction_id(tx) # True
format_transaction_id(tx, short=True) # "0xdeadbe...adbeef"

text = "sent via 0xabc123...def456 and 0xfeed00...cafe11"
parse_transaction_ids(text) # [normalized list of unique IDs found]