Add Hydra micropayments (gateway↔end user)

.github/workflows/ci.yaml

@@ -240,6 +240,23 @@ jobs:
         run: |
           nix run -L .#internal.x86_64-linux.hydra-platform-gateway-test
 
+  hydra_bridge_gateway_tests:
+    name: Hydra micropayments tests between Bridge↔Gateway
+    runs-on: [self-hosted, Linux, X64, nixos]
+    needs: check_flake_lock
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v5
+
+      - name: Run Hydra Tests
+        timeout-minutes: 45
+        env:
+          CARDANO_NODE_SOCKET_PATH: /run/cardano-node/node_preview.socket
+          BLOCKFROST_PROJECT_ID: ${{ secrets.BLOCKFROST_TESTS_PROJECT_ID }}
+          SUBMIT_MNEMONIC: ${{ secrets.BLOCKFROST_TESTS_SUBMIT_MNEMONIC }}
+        run: |
+          nix run -L .#internal.x86_64-linux.hydra-bridge-gateway-test
+
   coverage:
     name: Coverage
     runs-on: ubuntu-latest
@@ -256,7 +273,7 @@ jobs:
 
       - name: Check coverage
         timeout-minutes: 10
-        run: cargo tarpaulin --workspace --all --lib --features tarpaulin --fail-under 9
+        run: cargo tarpaulin --workspace --all --lib --features tarpaulin --fail-under 8
 
   oci_build:
     name: OCI Build (${{ matrix.arch }})

Cargo.toml

@@ -13,6 +13,7 @@ members = [
   "crates/node",
   "crates/data_node",
   "crates/gateway",
+  "crates/sdk_bridge",
   "crates/integration_tests",
 ]
 default-members = ["crates/platform"]

crates/gateway/Cargo.toml

@@ -39,6 +39,7 @@ rand.workspace = true
 base64.workspace = true
 uuid.workspace = true
 hyper.workspace = true
+tower.workspace = true
 machine-uid.workspace = true
 blake3.workspace = true
 getrandom.workspace = true

crates/gateway/config/development.toml

@@ -17,3 +17,12 @@ commit_ada = 3.0
 lovelace_per_request = 100_000
 requests_per_microtransaction = 10
 microtransactions_per_fanout = 2
+
+[hydra_bridge]
+max_concurrent_hydra_nodes = 2
+cardano_signing_key = "./hydra-config/preview/_our-keys/payment/payment.sk"
+node_socket_path = "/run/cardano-node/node.socket"
+commit_ada = 4.0
+lovelace_per_request = 100_000
+requests_per_microtransaction = 10
+microtransactions_per_fanout = 3

crates/gateway/src/config.rs

@@ -66,6 +66,7 @@ pub struct ConfigInput {
     pub database: DbInput,
     pub blockfrost: BlockfrostInput,
     pub hydra_platform: Option<HydraConfig>,
+    pub hydra_bridge: Option<HydraConfig>,
 }
 
 #[derive(Debug, Deserialize, Clone)]
@@ -74,6 +75,7 @@ pub struct Config {
     pub database: Db,
     pub blockfrost: Blockfrost,
     pub hydra_platform: Option<HydraConfig>,
+    pub hydra_bridge: Option<HydraConfig>,
 }
 
 #[derive(Debug, Deserialize, Clone)]
@@ -145,6 +147,7 @@ pub fn load_config(path: PathBuf) -> Config {
             nft_asset: toml_config.blockfrost.nft_asset,
         },
         hydra_platform: toml_config.hydra_platform,
+        hydra_bridge: toml_config.hydra_bridge,
     };
 
     override_with_env(config)
@@ -196,5 +199,6 @@ fn override_with_env(config: Config) -> Config {
             nft_asset,
         },
         hydra_platform: config.hydra_platform,
+        hydra_bridge: config.hydra_bridge,
     }
 }