Add reinsurance integration, oracle outlier detection, fix abstain-vote majority math

contracts/claims-processor/src/types.rs

@@ -56,8 +56,13 @@ pub struct Claim {
     /// For PartiallyPaid claims: payout ratio in basis points (0-10000).
     /// 10000 = full coverage; lower = proportional partial payment.
     pub partial_payout_bps: Option<u32>,
-    /// Installment payout configuration for large claims.
-    pub installments: Option<InstallmentSchedule>,
+    /// Installment payout configuration for large claims. `Vec` instead of
+    /// `Option<InstallmentSchedule>` because the soroban-sdk XDR (`ScVal`)
+    /// conversion generated for a contracttype struct does not support
+    /// `Option<CustomStruct>` fields — only `Vec<T>` round-trips a custom
+    /// struct through both the WASM `Val` path and the host-side `ScVal`
+    /// path used by test tooling. Empty = no installment schedule.
+    pub installments: Vec<InstallmentSchedule>,
     /// Whether the claimant's identity was verified (optional, for Sybil protection).
     pub identity_verified: bool,
     /// Type of identity verification performed (e.g., "kyc", "accreditation").
@@ -195,3 +200,177 @@ pub struct ContractUpgraded {
     pub old_version: u32,
     pub new_version: u32,
 }
+
+#[contracttype]
+#[derive(Clone, Debug, Eq, PartialEq)]
+pub struct GuardiansUpdated {
+    pub guardians: Vec<Address>,
+    pub threshold: u32,
+}
+
+#[contracttype]
+#[derive(Clone, Debug, Eq, PartialEq)]
+pub struct UpgradeApproved {
+    pub new_wasm_hash: BytesN<32>,
+    pub approver: Address,
+    pub approvals: u32,
+    pub threshold: u32,
+}
+
+/// A pending contract-upgrade action awaiting guardian approvals.
+#[contracttype]
+#[derive(Clone, Debug, Eq, PartialEq)]
+pub struct PendingUpgrade {
+    pub new_wasm_hash: BytesN<32>,
+    pub new_version: u32,
+    pub approvals: Vec<Address>,
+}
+
+/// A pending admin-transfer proposal awaiting guardian approvals.
+#[contracttype]
+#[derive(Clone, Debug, Eq, PartialEq)]
+pub struct PendingAdminChange {
+    pub new_admin: Address,
+    pub approvals: Vec<Address>,
+}
+
+#[contracttype]
+#[derive(Clone, Debug, Eq, PartialEq)]
+pub struct AdminUpdated {
+    pub new_admin: Address,
+}
+
+#[contracttype]
+#[derive(Clone, Debug, Eq, PartialEq)]
+pub struct CrossChainAttestation {
+    /// Which chain this observation came from.
+    pub chain_id: Symbol,
+    /// The registered attestor that submitted it.
+    pub attestor: Address,
+    /// The observed value, in the same fixed-point units as
+    /// `Policy.trigger_threshold`.
+    pub observed_value: i128,
+    /// Hash of the off-chain proof (light-client proof, relayer message,
+    /// oracle report) backing `observed_value`. Opaque to the contract —
+    /// kept for audit/dispute purposes, not verified on-chain.
+    pub proof_hash: BytesN<32>,
+    /// Unix timestamp of the observation.
+    pub timestamp: u64,
+}
+
+#[contracttype]
+#[derive(Clone, Debug, Eq, PartialEq)]
+pub struct CrossChainAttestorAdded {
+    pub chain_id: Symbol,
+    pub attestor: Address,
+}
+
+#[contracttype]
+#[derive(Clone, Debug, Eq, PartialEq)]
+pub struct CrossChainAttestorRemoved {
+    pub chain_id: Symbol,
+    pub attestor: Address,
+}
+
+#[contracttype]
+#[derive(Clone, Debug, Eq, PartialEq)]
+pub struct CrossChainAttestationSubmitted {
+    pub policy_id: u128,
+    pub chain_id: Symbol,
+    pub attestor: Address,
+    pub observed_value: i128,
+    pub timestamp: u64,
+}
+
+#[contracttype]
+#[derive(Clone, Debug, Eq, PartialEq)]
+pub struct InstallmentPayoutScheduled {
+    pub claim_id: u128,
+    pub policy_id: u128,
+    pub claimant: Address,
+    pub total_amount: i128,
+    pub num_installments: u32,
+    pub interval_seconds: u64,
+    pub first_installment_at: u64,
+}
+
+#[contracttype]
+#[derive(Clone, Debug, Eq, PartialEq)]
+pub struct InstallmentPaid {
+    pub claim_id: u128,
+    pub claimant: Address,
+    pub amount: i128,
+    pub paid_count: u32,
+    pub total_installments: u32,
+}
+
+/// Emitted when the payout delay configuration is updated.
+#[contracttype]
+#[derive(Clone, Debug, Eq, PartialEq)]
+pub struct PayoutDelayUpdated {
+    pub delay_seconds: u64,
+}
+
+/// Supported payout currencies for claim settlements.
+#[contracttype]
+#[derive(Clone, Debug, Eq, PartialEq)]
+pub enum PayoutCurrency {
+    /// Default USDC (7-decimal)
+    USDC,
+    /// Alternative stablecoin (address stored separately)
+    Custom(Address),
+}
+
+/// Multi-currency payout configuration for a claim.
+#[contracttype]
+#[derive(Clone, Debug, Eq, PartialEq)]
+pub struct PayoutOption {
+    /// Currency to pay out in.
+    pub currency: PayoutCurrency,
+    /// Exchange rate (basis points) relative to USDC. 10000 = 1:1 parity.
+    /// Used to convert USDC coverage amounts to equivalent other-currency amounts.
+    pub exchange_rate_bps: u32,
+    /// Whether this payout option is currently enabled.
+    pub enabled: bool,
+}
+
+/// Record of available payout currencies and their exchange rates.
+#[contracttype]
+#[derive(Clone, Debug, Eq, PartialEq)]
+pub struct PayoutCurrencyRegistry {
+    /// Address of the USDC token contract (default payout currency).
+    pub usdc_token: Address,
+    /// Optional alternative payout currencies with their exchange rates.
+    pub alt_currencies: Vec<Address>,
+    /// Exchange rates for alt currencies (index matches alt_currencies).
+    pub exchange_rates_bps: Vec<u32>,
+}
+
+/// Emitted when a new payout currency is registered.
+#[contracttype]
+#[derive(Clone, Debug, Eq, PartialEq)]
+pub struct PayoutCurrencyAdded {
+    pub token: Address,
+    pub exchange_rate_bps: u32,
+}
+
+/// Emitted when a payout currency's exchange rate is updated.
+#[contracttype]
+#[derive(Clone, Debug, Eq, PartialEq)]
+pub struct PayoutCurrencyRateUpdated {
+    pub token: Address,
+    pub old_rate_bps: u32,
+    pub new_rate_bps: u32,
+}
+
+/// Emitted when a claim is paid out in an alternate currency.
+#[contracttype]
+#[derive(Clone, Debug, Eq, PartialEq)]
+pub struct ClaimPaidInAlternativeCurrency {
+    pub claim_id: u128,
+    pub claimant: Address,
+    pub usdc_equivalent: i128,
+    pub token: Address,
+    pub actual_amount: i128,
+    pub exchange_rate_bps: u32,
+}