April felt like a month of turning unfinished pieces into usable Explorer backend features. Some work started in March, especially the mosaic module and transaction schema, but April was where those pieces were reviewed, refactored, merged, and connected into actual REST endpoints.

The puller needed to process all transaction types from blocks, while the REST side needed clean endpoints for querying transactions by hash and listing transactions with filters. There were also plenty of rebases, review feedback, refactoring, and test updates along the way. Slowly, the NEM Explorer backend is becoming more complete. 🦾

Summary of Key Work

• Completed and merged the mosaic module.
• Completed transaction processing from blocks.
• Added /transaction/<hash> and /transactions list endpoint with multiple filters.
• Added unconfirmed transaction support in lightapi/python.
• Verified puller sync locally using NEM testnet.

Work

Mosaic module

• The mosaic module was already started in March, so April was mainly about review feedback, refactoring, and getting it merged.
• Refactored the mosaic, mosaic listing and rich list REST endpoints.
• Added more unit tests for the mosaic rich list to make sure the endpoint behaves correctly.
• With these PRs merged, the mosaic module is now completed.

Transaction Puller

• The main focus this month was completing the transaction puller.
• Added support for processing all transaction types from blocks in puller.
• Fixed a bug where sender_address was not converted correctly from sender public key.