[skip ci] Define interface

lib/bindings/src/breez_sdk_liquid.udl

@@ -336,6 +336,7 @@ dictionary Config {
     string? cache_dir;
     u64? zero_conf_max_amount_sat;
     sequence<ExternalInputParser>? external_input_parsers = null;
+    u32? onchain_fee_rate_leeway_sat_per_vbyte;
 };
 
 enum LiquidNetwork {
@@ -537,6 +538,20 @@ interface GetPaymentRequest {
     Lightning(string payment_hash);
 };
 
+dictionary FetchPaymentProposedFeesRequest {
+    string swap_id;
+};
+
+dictionary FetchPaymentProposedFeesResponse {
+    string swap_id;
+    u64 fees_sat;
+    u64 payer_amount_sat;
+};
+
+dictionary AcceptPaymentProposedFeesRequest {
+    FetchPaymentProposedFeesResponse response;
+};
+
 [Enum]
 interface PaymentDetails {
     Lightning(string swap_id, string description, string? preimage, string? bolt11, string? bolt12_offer, string? payment_hash, string? refund_tx_id, u64? refund_tx_amount_sat);
@@ -569,6 +584,7 @@ enum PaymentState {
     "TimedOut",
     "Refundable",
     "RefundPending",
+    "WaitingUserAction",
 };
 
 dictionary RefundableSwap {
@@ -615,6 +631,7 @@ interface SdkEvent {
     PaymentRefundPending(Payment details);
     PaymentSucceeded(Payment details);
     PaymentWaitingConfirmation(Payment details);
+    PaymentWaitingFeeAcceptance(Payment details);
     Synced();
 };
 
@@ -734,6 +751,12 @@ interface BindingLiquidSdk {
     [Throws=PaymentError]
     Payment? get_payment(GetPaymentRequest req);
 
+    [Throws=SdkError]
+    FetchPaymentProposedFeesResponse fetch_payment_proposed_fees(FetchPaymentProposedFeesRequest req);
+
+    [Throws=SdkError]
+    void accept_payment_proposed_fees(AcceptPaymentProposedFeesRequest req);
+
     [Throws=SdkError]
     sequence<RefundableSwap> list_refundables();