feat: payment processor

crates/cdk-payment-processor/src/proto/payment_processor.proto

@@ -0,0 +1,113 @@
+syntax = "proto3";
+
+package cdk_payment_processor;
+
+service CdkPaymentProcessor {  
+    rpc GetSettings(SettingsRequest) returns (SettingsResponse) {}
+    rpc CreatePayment(CreatePaymentRequest) returns (CreatePaymentResponse) {}
+    rpc GetPaymentQuote(PaymentQuoteRequest) returns (PaymentQuoteResponse) {}
+    rpc MakePayment(MakePaymentRequest) returns (MakePaymentResponse) {}
+    rpc CheckIncomingPayment(CheckIncomingPaymentRequest) returns (CheckIncomingPaymentResponse) {}
+    rpc CheckOutgoingPayment(CheckOutgoingPaymentRequest) returns (MakePaymentResponse) {}
+    rpc WaitIncomingPayment(WaitIncomingPaymentRequest) returns (stream WaitIncomingPaymentResponse) {}
+}
+
+message SettingsRequest {}
+
+message SettingsResponse {
+  string inner = 1;
+}
+
+message CreatePaymentRequest {
+  uint64 amount = 1;
+  string unit = 2;
+  string description = 3;
+  optional uint64 unix_expiry = 4;
+}
+
+message CreatePaymentResponse {
+  string request_lookup_id = 1;
+  string request = 2;
+  optional uint64 expiry = 3;
+}
+
+message Mpp {
+    uint64 amount = 1;
+}
+
+message MeltOptions {
+    oneof options {
+        Mpp mpp = 1;
+    }
+}
+
+message PaymentQuoteRequest {
+  string request = 1;
+  string unit = 2;
+  optional MeltOptions options = 3;
+}
+
+enum QuoteState {
+    UNPAID = 0;
+    PAID = 1;
+    PENDING = 2;
+    UNKNOWN = 3;
+    FAILED = 4;
+    ISSUED = 5;
+}
+
+
+message PaymentQuoteResponse {
+  string request_lookup_id = 1;
+  uint64 amount = 2;
+  uint64 fee = 3;
+  QuoteState state = 4;
+}
+
+message MeltQuote {
+    string id = 1;
+    string unit = 2;
+    uint64 amount = 3;
+    string request = 4;
+    uint64 fee_reserve = 5;
+    QuoteState state = 6;
+    uint64 expiry = 7;
+    optional string payment_preimage = 8;
+    string request_lookup_id = 9;
+    optional uint64 msat_to_pay = 10;
+}
+
+message MakePaymentRequest {
+  MeltQuote melt_quote = 1;
+  optional uint64 partial_amount = 2;
+  optional uint64 max_fee_amount = 3;
+}
+
+message MakePaymentResponse {
+  string payment_lookup_id = 1;
+  optional string payment_proof = 2;
+  QuoteState status = 3;
+  uint64 total_spent = 4;
+  string unit = 5;
+}
+
+message CheckIncomingPaymentRequest {
+  string request_lookup_id = 1;
+}
+
+message CheckIncomingPaymentResponse {
+  QuoteState status = 1;
+}
+
+message CheckOutgoingPaymentRequest {
+  string request_lookup_id = 1;
+}
+
+
+message WaitIncomingPaymentRequest {
+}
+
+
+message WaitIncomingPaymentResponse {
+  string lookup_id = 1;
+}