diff --git a/l3/hello/go.mod b/l3/hello/go.mod
new file mode 100644
index 0000000..43680c0
--- /dev/null
+++ b/l3/hello/go.mod
@@ -0,0 +1,5 @@
+module hello
+
+go 1.20
+
+require github.com/nspcc-dev/neo-go/pkg/interop v0.0.0-20231027092558-8ed6d97085d3
diff --git a/l3/hello/go.sum b/l3/hello/go.sum
new file mode 100644
index 0000000..0e8d391
--- /dev/null
+++ b/l3/hello/go.sum
@@ -0,0 +1,2 @@
+github.com/nspcc-dev/neo-go/pkg/interop v0.0.0-20231027092558-8ed6d97085d3 h1:ybQcK5pTNAR+wQU3k4cGeOZN6OCiVcQkbgR3Zl6NFPU=
+github.com/nspcc-dev/neo-go/pkg/interop v0.0.0-20231027092558-8ed6d97085d3/go.mod h1:J/Mk6+nKeKSW4wygkZQFLQ6SkLOSGX5Ga0RuuuktEag=
diff --git a/l3/hello/hello.go b/l3/hello/hello.go
new file mode 100644
index 0000000..0ac6ed1
--- /dev/null
+++ b/l3/hello/hello.go
@@ -0,0 +1,9 @@
+package hello
+
+import (
+	"github.com/nspcc-dev/neo-go/pkg/interop/runtime"
+)
+
+func Main() {
+	runtime.Log("Hello, World!")
+}
diff --git a/l3/hello/hello.yml b/l3/hello/hello.yml
new file mode 100644
index 0000000..442d59c
--- /dev/null
+++ b/l3/hello/hello.yml
@@ -0,0 +1,4 @@
+name: "HelloWorld contract"
+sourceurl: https://git.frostfs.info/Web3N3/web3-course
+supportedstandards: []
+events: []
diff --git a/l3/protocol.privnet.yml b/l3/protocol.privnet.yml
new file mode 100644
index 0000000..6204984
--- /dev/null
+++ b/l3/protocol.privnet.yml
@@ -0,0 +1,54 @@
+ProtocolConfiguration:
+  Magic: 15405
+  MaxTraceableBlocks: 200000
+  TimePerBlock: 1s
+  MemPoolSize: 50000
+  StandbyCommittee:
+    - 02b3622bf4017bdfe317c58aed5f4c753f206b7db896046fa7d774bbc4bf7f8dc2
+  ValidatorsCount: 1
+  SeedList:
+    - 127.0.0.1:20333
+  VerifyTransactions: true
+  StateRootInHeader: true
+  P2PSigExtensions: true
+
+ApplicationConfiguration:
+  SkipBlockVerification: false
+  DBConfiguration:
+    Type: "boltdb"
+    BoltDBOptions:
+      FilePath: "/data/chain/morph.bolt"
+  P2P:
+    Addresses:
+      - ":20333"
+    DialTimeout: 3s
+    ProtoTickInterval: 2s
+    PingInterval: 30s
+    PingTimeout: 90s
+    MaxPeers: 10
+    AttemptConnPeers: 5
+    MinPeers: 0
+  Relay: true
+  RPC:
+    Addresses:
+      - ":30333"
+    Enabled: true
+    SessionEnabled: true
+    EnableCORSWorkaround: false
+    MaxGasInvoke: 100
+  P2PNotary:
+    Enabled: true
+    UnlockWallet:
+      Path: "/config/node-wallet.json"
+      Password: "one"
+  Prometheus:
+    Addresses:
+      - ":20001"
+    Enabled: true
+  Pprof:
+    Addresses:
+      - ":20011"
+    Enabled: false
+  UnlockWallet:
+    Path: "/config/node-wallet.json"
+    Password: "one"