Blend Protocol integration: loan_repaid events on testnet

[Cbiux]

Summary

Integrate Blend Protocol repayments on testnet as loan_repaid credit events — detect genuine Repay operations on-chain and report to ZCore.

Blend is contract-first (no REST webhooks). Same adapter pattern as #17.

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Scope (v1)

1. Document testnet pool + asset IDs
2. Script to parse Blend Repay txs from Horizon/Soroban RPC
3. Map to ZCore POST /api/events/report with eventType: "loan_repaid"

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ZCore payload

{
  "apiKey": "<blend_platform_key>",
  "eventType": "loan_repaid",
  "walletAddress": "G<BORROWER>",
  "amount": 500,
  "currency": "USDC",
  "txHash": "...",
  "timestamp": "2026-06-20T12:00:00.000Z"
}

Score: EVENT_WEIGHTS.loan_repaid in Server/src/constants/scoring.constants.ts (max 80 pts/event).

Verification: Server/src/services/stellar.service.ts → verifyTransaction(txHash).

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Deliverables

Path	Action
Docs/integrations/blend-protocol.md	Create — pool IDs, Repay op detection, examples
scripts/integrations/blend-repay-indexer.ts	Optional — scan recent txs, filter Repay

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Acceptance criteria

• One testnet Repay tx successfully ingested (score updates)
• Non-Repay tx rejected by verification
• Integration doc with testnet contract addresses
• Platform registered with admin dashboard
• Depends on Provision production MySQL and configure DATABASE_URL on Vercel #15 for prod

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References

• Blend integrations: https://docs.blend.capital/tech-docs/integrations/integrate-pool.md