feat(insurance): integrate external insurance providers (#250)#412
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LaGodxy merged 2 commits intoMettaChain:mainfrom Apr 29, 2026
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Implement on-chain registry and hybrid coverage request flow for connecting PropChain policies to traditional insurance companies. Changes: - types.rs: CoverageRequestStatus (Pending/Confirmed/Declined/Cancelled), ExternalProvider (id, name, api_endpoint, supported_coverage_types, is_active), ExternalCoverageRequest (request + provider response fields) - errors.rs: ProviderNotFound, ProviderInactive, CoverageRequestNotFound, CoverageRequestNotPending, UnsupportedCoverageType - lib.rs: storage fields, ProviderRegistered/CoverageRequested/ CoverageResponseRecorded events, and messages: register_external_provider, deactivate_external_provider, request_external_coverage, record_coverage_response, cancel_coverage_request, get_external_provider, get_coverage_request, get_policy_coverage_requests, get_provider_count - tests.rs: 13 unit tests covering registration, deactivation, request creation, response recording (confirm/decline), cancellation, and all error paths Closes MettaChain#250
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Summary
Implements an on-chain registry and hybrid coverage request flow that connects PropChain policies to traditional (off-chain) insurance companies.
Design
Because smart contracts cannot make outbound HTTP calls, the integration uses a relayer pattern:
record_coverage_responseThis keeps the contract trustless (only authorized oracles/admin can record responses) while enabling real-world API connectivity.
Changes
contracts/insurance/src/types.rsCoverageRequestStatus:Pending/Confirmed/Declined/CancelledExternalProvider: id, name, api_endpoint, supported_coverage_types, is_active, registered_atExternalCoverageRequest: request details + provider quote, reference, and response timestampcontracts/insurance/src/errors.rsProviderNotFound,ProviderInactive,CoverageRequestNotFound,CoverageRequestNotPending,UnsupportedCoverageTypecontracts/insurance/src/lib.rsStorage, events, and messages:
register_external_providerdeactivate_external_providerrequest_external_coveragerecord_coverage_responsecancel_coverage_requestget_external_providerget_coverage_requestget_policy_coverage_requestsget_provider_countcontracts/insurance/src/tests.rs13 unit tests covering: registration (happy path, unauthorized), deactivation, coverage requests (happy path, non-policyholder, inactive provider, unsupported type), response recording (confirmed, declined, unauthorized, duplicate), cancellation (happy path, non-requester), and authorized oracle recording.
Closes #250