Contract Event Replay Index

[Luluameh]

Contract Event Replay Index
Background
If the off-chain indexer misses events (downtime, reorg), it needs a way to re-fetch historical events without re-scanning the entire chain.
Goal
Maintain an on-chain event log ring buffer (DataKey::EventLog(index)) storing the last 1000 event summaries in Temporary storage.
Acceptance Criteria

• Every state-change event writes a summary entry to the ring buffer.
• get_event_log(from_index, limit) read function returns paginated results.
• Ring buffer wraps around after 1000 entries.
• Buffer entries use Temporary storage to keep rent costs low.
  Key Files
  contracts/src/events.rs, contracts/src/lib.rs

[Abioladory123]

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[Heazzy500]

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Want me to clean these up into one stronger template you can reuse?

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[Pvsaint]

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