doc(rpc): update rpc document for polyjuice tx from zero
@@ -1038,6 +1038,7 @@ Response
* params:
* `raw_l2tx`: [`SerializedRawL2Transaction`](#type-serializedmoleculeschema) - Serialized Raw L2 Transaction
* `block_number`(optional): [`Uint64`](#type-uint64) - block number, default is tip
+ * `registry_address`(optional): [`SerializedRegistryAddress`](#type-serializedregistryaddress) - Serialized registry address, **required for polyjuice tx from id zero**
* result: [`RunResult`](#type-runresult)
@@ -1156,10 +1157,13 @@ Response
### Method `gw_submit_l2transaction`
* params:
* `l2tx`: [`SerializedL2Transaction`](#type-serializdmoleculeschema) - L2 transaction
-* result: [`H256`](#type-h256)
+* result: [`H256`](#type-h256) `|` `null`
Submit layer2 transaction. This RPC may has rate limit.
+For polyjuice tx from id zero, this RPC returns `null` because its from id will be updated
+before package.
+
#### Examples
Request
