Add Blockchain Event Listener Service

[SudiptaPaul-31]

Description

Develop a service that listens for Stellar blockchain events related to the application. Automatically synchronize ownership updates, transfers, and verification events with the platform database to ensure consistency between on-chain and off-chain states.

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Responsibilities

• Ownership Updates
  Detect and synchronize changes in snippet or contract ownership.

• Transfers
  Listen for asset or snippet transfer events and update backend records accordingly.

• Verification Events
  Capture wallet-based identity verification and permission assignment events.

• Real-Time Sync
  Ensure events are processed and reflected in the platform database with minimal latency.

• Error Handling & Retries
  Implement robust retry logic for failed event synchronizations.

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Acceptance Criteria

• ✅ Reliable event listening — Service consistently listens to Stellar blockchain events.
• ✅ Database synchronization — Ownership, transfer, and verification events are reflected in backend records.
• ✅ No duplication — Events are processed exactly once.
• ✅ Error resilience — Failed synchronizations are retried until successful.
• ✅ Audit trail maintained — All events are logged for transparency and debugging.

[Noor1-star]

@Noor1-star has applied to work on this issue as part of the Stellar Wave Program's 7th wave.

Hello, I've carefully examined the issue description and have a clear grasp of the requirements. I'm interested in working on it and committed to delivering quality results.

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