Added provide_token_metadata to client

Author: apaillier-ledger

client/src/ledger_app_clients/ethereum/client.py

@@ -231,3 +231,25 @@ def personal_sign(self, path: str, msg: bytes):
             with self._send(chunk):
                 pass
         return self._send(chunks[-1])
+
+    def provide_token_metadata(self,
+                               ticker: str,
+                               addr: bytes,
+                               decimals: int,
+                               chain_id: int,
+                               sig: Optional[bytes] = None):
+        if sig is None:
+            # Temporarily get a command with an empty signature to extract the payload and
+            # compute the signature on it
+            tmp = self._cmd_builder.provide_erc20_token_information(ticker,
+                                                                    addr,
+                                                                    decimals,
+                                                                    chain_id,
+                                                                    bytes())
+            # skip APDU header & empty sig
+            sig = sign_data(Key.CAL, tmp[6:])
+        return self._send(self._cmd_builder.provide_erc20_token_information(ticker,
+                                                                            addr,
+                                                                            decimals,
+                                                                            chain_id,
+                                                                            sig))

client/src/ledger_app_clients/ethereum/command_builder.py

@@ -13,6 +13,7 @@ class InsType(IntEnum):
     GET_PUBLIC_ADDR = 0x02
     SIGN = 0x04
     PERSONAL_SIGN = 0x08
+    PROVIDE_ERC20_TOKEN_INFORMATION = 0x0a
     PROVIDE_NFT_INFORMATION = 0x14
     SET_PLUGIN = 0x16
     EIP712_SEND_STRUCT_DEF = 0x1a
@@ -310,3 +311,21 @@ def personal_sign(self, path: str, msg: bytes):
             payload = payload[chunk_size:]
             p1 = P1Type.SIGN_SUBSQT_CHUNK
         return chunks
+
+    def provide_erc20_token_information(self,
+                                        ticker: str,
+                                        addr: bytes,
+                                        decimals: int,
+                                        chain_id: int,
+                                        sig: bytes) -> bytes:
+        payload = bytearray()
+        payload.append(len(ticker))
+        payload += ticker.encode()
+        payload += addr
+        payload += struct.pack(">I", decimals)
+        payload += struct.pack(">I", chain_id)
+        payload += sig
+        return self._serialize(InsType.PROVIDE_ERC20_TOKEN_INFORMATION,
+                               0x00,
+                               0x00,
+                               payload)