feat(insurance): add claims dispute resolution (#255)#411
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LaGodxy merged 2 commits intoMettaChain:mainfrom Apr 29, 2026
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Implement a three-step dispute resolution flow for rejected insurance claims: 1. raise_dispute – claimant disputes a rejected claim (one per claim) 2. vote_on_dispute – authorized assessors/admin cast votes 3. resolve_dispute – admin closes the dispute and applies the outcome; ClaimantWins re-approves the claim and executes payout, InsurerWins keeps the claim rejected. Changes: - types.rs: DisputeStatus (Open/Resolved/Dismissed), DisputeOutcome (ClaimantWins/InsurerWins), ClaimDispute struct - errors.rs: DisputeNotFound, DisputeAlreadyExists, DisputeNotOpen, AlreadyVoted, ClaimNotRejected - lib.rs: dispute storage fields, DisputeRaised/DisputeVoteCast/ DisputeResolved events, raise_dispute/vote_on_dispute/resolve_dispute messages, get_dispute/get_claim_dispute_id/get_dispute_count queries - tests.rs: 11 unit tests covering the full lifecycle Closes MettaChain#255
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Summary
Implements a three-step dispute resolution flow for rejected insurance claims, allowing claimants to challenge decisions through a voting process.
Flow
raise_dispute(claim_id, reason)— Only the original claimant may call this on aRejectedclaim. One dispute per claim. Sets claim status toDisputed.vote_on_dispute(dispute_id, in_favour_of_claimant)— Authorized assessors or admin cast votes. Each address may vote once per dispute.resolve_dispute(dispute_id, outcome)— Admin closes the dispute:ClaimantWins: claim re-approved, payout executed from poolInsurerWins: claim stays rejectedChanges
contracts/insurance/src/types.rsDisputeStatus:Open/Resolved/DismissedDisputeOutcome:ClaimantWins/InsurerWinsClaimDisputestruct: dispute_id, claim_id, claimant, reason, status, outcome, vote tallies, timestampscontracts/insurance/src/errors.rsDisputeNotFound,DisputeAlreadyExists,DisputeNotOpen,AlreadyVoted,ClaimNotRejectedcontracts/insurance/src/lib.rsdisputes,dispute_count,claim_dispute(claim→dispute mapping),dispute_voters(double-vote guard)DisputeRaised,DisputeVoteCast,DisputeResolvedraise_dispute,vote_on_dispute,resolve_dispute,get_dispute,get_claim_dispute_id,get_dispute_countcontracts/insurance/src/tests.rs11 unit tests covering: raise dispute (happy path, non-claimant, non-rejected claim, duplicate), vote (happy path, unauthorized, double-vote), resolve (claimant wins, insurer wins, unauthorized, already resolved).
Closes #255