change DefaultParams on the host to allow all messages ("*") (#2290)

* change DefaultParams on the host to allow all messages ("*")

Interchain Accounts are used by controller chains to execute transactions on the host chain. My suggestion is just as normal wallets are allowed to submit any transaction, by default, the host should allow all types of messages to be submitted using the ICAs. 

Allowing all messages by default makes more sense regarding the purpose of Interchain Accounts. 
Otherwise, it looks like this parameter should be configured to enable Interchain Accounts.

* correct formatting (gofumpt)

correct formatting (gofumpt)

* hold wildcard string in a constant

* add changelog

Co-authored-by: george <>
Co-authored-by: Carlos Rodriguez <carlos@interchain.io>
Co-authored-by: colin axnér <25233464+colin-axner@users.noreply.github.com>

CHANGELOG.md

@@ -96,6 +96,7 @@ Ref: https://keepachangelog.com/en/1.0.0/
 * (apps/27-interchain-accounts) [\#2157](https://github.com/cosmos/ibc-go/pull/2157) Adding `IsMiddlewareEnabled` functionality to enforce calls to ICS27 msg server to *not* route to the underlying application.
 * (apps/27-interchain-accounts) [\#2177](https://github.com/cosmos/ibc-go/pull/2177) Adding `IsMiddlewareEnabled` flag to interchain accounts `ActiveChannel` genesis type.
 * (apps/27-interchain-accounts) [\#2140](https://github.com/cosmos/ibc-go/pull/2140) Adding migration handler to ICS27 `controller` submodule to assert ownership of channel capabilities and set middleware enabled flag for existing channels. The ICS27 module consensus version has been bumped from 1 to 2.
+* (apps/27-interchain-accounts) [\#2290](https://github.com/cosmos/ibc-go/pull/2290) Changed `DefaultParams` function in `host` submodule to allow all messages by default. Defined a constant named `AllowAllHostMsgs` for `host` module to keep wildcard "*" string which allows all messages. 
 
 ### Features
 

modules/apps/27-interchain-accounts/host/types/keys.go

@@ -10,12 +10,15 @@ const (
 
  // StoreKey is the store key string for the interchain accounts host module
  StoreKey = SubModuleName
+
+ // AllowAllHostMsgs holds the string key that allows all message types on interchain accounts host module
+ AllowAllHostMsgs = "*"
 )
 
 // ContainsMsgType returns true if the sdk.Msg TypeURL is present in allowMsgs, otherwise false
 func ContainsMsgType(allowMsgs []string, msg sdk.Msg) bool {
  // check that wildcard * option for allowing all message types is the only string in the array, if so, return true
- if len(allowMsgs) == 1 && allowMsgs[0] == "*" {
+ if len(allowMsgs) == 1 && allowMsgs[0] == AllowAllHostMsgs {
  return true
  }
 

modules/apps/27-interchain-accounts/host/types/params.go

@@ -34,7 +34,7 @@ func NewParams(enableHost bool, allowMsgs []string) Params {
 
 // DefaultParams is the default parameter configuration for the host submodule
 func DefaultParams() Params {
- return NewParams(DefaultHostEnabled, nil)
+ return NewParams(DefaultHostEnabled, []string{AllowAllHostMsgs})
 }
 
 // Validate validates all host submodule parameters