Update documentation

x/foundation/README.md

@@ -17,9 +17,9 @@ back these foundation-specific functionalities.
 ## Contents
 
 * [Concepts](#concepts)
-* [Parameters](#parameters)
 * [State](#state)
 * [Msg Service](#msg-service)
+    * [Msg/UpdateParams](#msgupdateparams)
     * [Msg/UpdateDecisionPolicy](#msgupdatedecisionpolicy)
     * [Msg/UpdateMembers](#msgupdatemembers)
     * [Msg/LeaveFoundation](#msgleavefoundation)
@@ -33,6 +33,7 @@ back these foundation-specific functionalities.
     * [Msg/FundTreasury](#msgfundtreasury)
     * [Msg/WithdrawFromTreasury](#msgwithdrawfromtreasury)
 * [Events](#events)
+    * [EventUpdateFoundationParams](#eventupdatefoundationparams)
     * [EventUpdateDecisionPolicy](#eventupdatedecisionpolicy)
     * [EventUpdateMembers](#eventupdatedmembers)
     * [EventLeaveFoundation](#eventleavefoundation)
@@ -269,15 +270,16 @@ The foundation can withdraw coins from the treasury. The recipient must have
 the corresponding authorization (`ReceiveFromTreasuryAuthorization`) prior to
 sending the message `Msg/WithdrawFromTreasury`.
 
-# Parameters
 
-## FoundationTax
+# State
 
-The value of `FoundationTax` is the foundation tax rate.
+## Params
 
-* FoundationTax: `sdk.Dec`
+### FoundationTax
 
-# State
+* Params: `0x00 -> PropocolBuffer(Params)`.
+
+The value of `FoundationTax` is the foundation tax rate.
 
 ## FoundationInfo
 
@@ -346,6 +348,17 @@ Authorization) tuple.
 
 # Msg Service
 
+## Msg/UpdateParams
+
+The `MsgUpdateParams` can be used to update the parameters of `foundation`.
+
++++ https://github.com/Finschia/finschia-sdk/blob/f682f758268c19dd93958abbbaf697f51e6991b3/proto/lbm/foundation/v1/tx.proto#L62-L71
+
+It's expected to fail if:
+
+* the authority is not the module's authority.
+* the parameters introduces any new foundation-specific features.
+
 ## Msg/UpdateDecisionPolicy
 
 The `MsgUpdateDecisionPolicy` can be used to update the decision policy.
@@ -511,6 +524,15 @@ The message handling should fail if:
 
 # Events
 
+## EventUpdateFoundationParams
+
+`EventUpdateFoundationParams` is an event emitted when the foundation
+parameters have been updated.
+
+| Attribute Key | Attribute Value |
+|---------------|-----------------|
+| params        | {params}        |
+
 ## EventUpdateDecisionPolicy
 
 `EventUpdateDecisionPolicy` is an event emitted when the decision policy have
@@ -986,6 +1008,25 @@ simd tx foundation --help
 you cannot broadcast the message directly. The use of those commands is to make
 it easier to generate the messages by end users.
 
+#### update-params
+
+The `update-params` command allows users to update the foundation's parameters.
+
+```bash
+simd tx foundation update-params [authority] [params-json] [flags]
+```
+
+Example:
+
+```bash
+simd tx foundation update-params link1... \
+    '{
+       "foundation_tax": "0.1"
+     }'
+```
+
+**Note:** The signer MUST be the module's authority.
+
 #### update-members
 
 The `update-members` command allows users to update the foundation's members.