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+### Changelog for internal API (ui-api)
+
+### 2.0.0
+
+* Modify how `call_info` on a transaction is conveyed. New format:
+
+```
+{
+  "jsonrpc": "2.0",
+  "id": 2,
+  "method": "ApproveTx",
+  "params": [
+    {
+      "transaction": {
+        "from": "0x82A2A876D39022B3019932D30Cd9c97ad5616813",
+        "to": "0x07a565b7ed7d7a678680a4c162885bedbb695fe0",
+        "gas": "0x333",
+        "gasPrice": "0x123",
+        "value": "0x10",
+        "nonce": "0x0",
+        "data": "0x4401a6e40000000000000000000000000000000000000000000000000000000000000012",
+        "input": null
+      },
+      "call_info": [
+        {
+          "type": "WARNING",
+          "message": "Invalid checksum on to-address"
+        },
+        {
+          "type": "WARNING",
+          "message": "Tx contains data, but provided ABI signature could not be matched: Did not match: test (0 matches)"
+        }
+      ],
+      "meta": {
+        "remote": "127.0.0.1:54286",
+        "local": "localhost:8550",
+        "scheme": "HTTP/1.1"
+      }
+    }
+  ]
+}
+```
+
+#### 1.2.0
+
+* Add `OnStartup` method, to provide the UI with information about what API version
+the signer uses (both internal and external) aswell as build-info and external api.
+
+Example call:
+```json
+{
+  "jsonrpc": "2.0",
+  "id": 1,
+  "method": "OnSignerStartup",
+  "params": [
+    {
+      "info": {
+        "extapi_http": "http://localhost:8550",
+        "extapi_ipc": null,
+        "extapi_version": "2.0.0",
+        "intapi_version": "1.2.0"
+      }
+    }
+  ]
+}
+```
+
+#### 1.1.0
+
+* Add `OnApproved` method
+
+#### 1.0.0
+
+Initial release.
+
+### Versioning
+
+The API uses [semantic versioning](https://semver.org/).
+
+TLDR; Given a version number MAJOR.MINOR.PATCH, increment the:
+
+* MAJOR version when you make incompatible API changes,
+* MINOR version when you add functionality in a backwards-compatible manner, and
+* PATCH version when you make backwards-compatible bug fixes.
+
+Additional labels for pre-release and build metadata are available as extensions to the MAJOR.MINOR.PATCH format.