add sequence diagram to readme

README.md

@@ -1,4 +1,5 @@
 [![Github Actions][gha-badge]][gha] [![Hardhat][hardhat-badge]][hardhat] [![License: MIT][license-badge]][license]
+
 # Enclave
 
 [gha]: https://github.com/gnosisguild/enclave/actions
@@ -10,10 +11,66 @@
 
 This is the monorepo for Enclave, an open-source protocol for Encrypted Execution Environments (E3).
 
+## Architecture
+
+Enclave employs a modular architecture involving numerous actors and participants. The sequence diagram below offers a high-level overview of the protocol, but necessarily omits most detail.
+
+```mermaid
+sequenceDiagram
+    actor Token Holders
+    actor Requester
+    actor Data Providers
+    participant Enclave
+    participant Ciphernode Registry
+    participant Ciphernodes
+    participant Computation Module
+    participant Execution Module
+
+    loop Each token holder that wants to register a ciphernode
+        Token Holders ->> Ciphernode Registry: Stake tokens to register ciphernodes
+    end
+
+    loop Each computation request
+        Requester ->> Enclave: Request computation
+        activate Enclave
+            Enclave ->> Ciphernode Registry: Select Committee
+            activate Ciphernode Registry
+                Ciphernode Registry -->> Ciphernodes: Key Setup
+                activate Ciphernodes
+                    Ciphernodes -->> Ciphernode Registry: Publish shared key
+                deactivate Ciphernodes
+                Ciphernode Registry -->> Enclave: Publish Committee
+            deactivate Ciphernode Registry
+
+            loop Each input provider
+                Data Providers ->> Enclave: Publish inputs
+                Enclave ->> Computation Module: Validate inputs
+                activate Computation Module
+                    Computation Module -->> Enclave: 👌
+                deactivate Computation Module
+            end
+
+            Enclave ->> Execution Module: Request execution
+            activate Execution Module
+            Execution Module -->> Enclave: Publish ciphertext output
+            deactivate Execution Module
+
+            Enclave -->> Ciphernodes: Request plaintext output
+            activate Ciphernodes
+                Ciphernodes ->> Enclave: Publish plaintext output
+            deactivate Ciphernodes
+
+            Requester -->> Enclave: Get plaintext
+            Enclave -->> Requester: Returns plaintext
+        deactivate Enclave
+    end
+
+```
+
 ## Security and Liability
 
 This repo is provided WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 
 ## License
 
-This repo created under the [LGPL-3.0+ license](LICENSE).
+This repo created under the [LGPL-3.0+ license](LICENSE).