feat: RFQ exclusivity, Dutch auctions, gasless intents, anti-spam deposits - #441
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james2177 merged 2 commits intoSep 30, 2026
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… anti-spam deposits - Issue stellar-vortex-protocol#360: Add exclusive_solver and exclusivity_deadline fields to IntentRecord and enforce via check_exclusivity() in accept flows - Issue stellar-vortex-protocol#359: Implement Dutch-auction decay via start_dst_amount and decay_start/end fields, with current_min_dst() calculating real-time minimum output - Issue stellar-vortex-protocol#361: Add submit_intent_signed() for ed25519-verified gasless submissions using per-public-key nonce tracking to prevent replay attacks - Issue stellar-vortex-protocol#362: Add configurable submission_deposit to ProtocolConfig with refund logic on fill/cancel and keeper rewards on expiry via new DataKey::IntentDeposit Add new error codes 36–41 covering exclusivity violations, invalid decay configs, signature verification failures, and deposit-related issues. Introduce new DataKeys for managing deposits and consumed nonces. Helper functions for TTL management and deposit collection/refund. Closes stellar-vortex-protocol#360 Closes stellar-vortex-protocol#361 Closes stellar-vortex-protocol#359 Closes stellar-vortex-protocol#362
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…-361-362 # Conflicts: # intent_settlement/src/lib.rs
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Summary
Implementation of four high-priority RFQ features:
submit_intent_signed) #361: Gasless intents via ed25519-signed payloadssubmit_intent#362: Refundable anti-spam deposit on intent submissionChanges
Struct Extensions
IntentRecord: Added exclusive_solver, exclusivity_deadline, start_dst_amount, decay_start, decay_end, submission_nonce, user_public_key fieldsProtocolConfig: Added submission_deposit_token and submission_deposit_amount fieldsNew Functions
submit_intent_signed(): ed25519-verified gasless submission with per-public-key nonce trackingcurrent_min_dst(): Real-time Dutch auction price calculatorcheck_exclusivity(): Verify solver authorization during acceptcollect_deposit()/refund_deposit(): Deposit lifecycle managementError Codes
Added 6 new error codes (36-41) for:
Storage
New DataKey variants for deposit escrow and nonce tracking:
Closes #360
Closes #359
Closes #361
Closes #362