mukan-ibc/docs/versioned_docs/version-v10.1.x/02-apps/01-transfer/07-params.md

title	sidebar_label	sidebar_position	slug
Params	Params	7	/apps/transfer/ics20-v1/params

Parameters

The IBC transfer application module contains the following parameters:

Name	Type	Default Value
SendEnabled	bool	true
ReceiveEnabled	bool	true

The IBC transfer module stores its parameters under its StoreKey

SendEnabled

The SendEnabled parameter controls send cross-chain transfer capabilities for all fungible tokens.

To prevent a single token from being transferred from the chain, set the SendEnabled parameter to true and then, depending on the Cosmos SDK version, do one of the following:

• For Cosmos SDK v0.46.x or earlier, set the bank module's SendEnabled parameter for the denomination to false.
• For Cosmos SDK versions above v0.46.x, set the bank module's SendEnabled entry for the denomination to false using MsgSetSendEnabled as a governance proposal.

:::warning Doing so will prevent the token from being transferred between any accounts in the blockchain. :::

ReceiveEnabled

The transfers enabled parameter controls receive cross-chain transfer capabilities for all fungible tokens.

To prevent a single token from being transferred to the chain, set the ReceiveEnabled parameter to true and then, depending on the Cosmos SDK version, do one of the following:

• For Cosmos SDK v0.46.x or earlier, set the bank module's SendEnabled parameter for the denomination to false.
• For Cosmos SDK versions above v0.46.x, set the bank module's SendEnabled entry for the denomination to false using MsgSetSendEnabled as a governance proposal.

:::warning Doing so will prevent the token from being transferred between any accounts in the blockchain. :::

Queries

Current parameter values can be queried via a query message.

// proto/ibc/applications/transfer/v1/query.proto

// QueryParamsRequest is the request type for the Query/Params RPC method.
message QueryParamsRequest {}

// QueryParamsResponse is the response type for the Query/Params RPC method.
message QueryParamsResponse {
  // params defines the parameters of the module.
  Params params = 1;
}

To execute the query in simd, you use the following command:

simd query ibc-transfer params

Changing Parameters

To change the parameter values, you must make a governance proposal that executes the MsgUpdateParams message.

// proto/ibc/applications/transfer/v1/tx.proto

// MsgUpdateParams is the Msg/UpdateParams request type.
message MsgUpdateParams {
  // signer address (it may be the address that controls the module, which defaults to x/gov unless overwritten).
  string signer = 1;

  // params defines the transfer parameters to update.
  //
  // NOTE: All parameters must be supplied.
  Params params = 2 [(gogoproto.nullable) = false];
}

// MsgUpdateParamsResponse defines the response structure for executing a
// MsgUpdateParams message.
message MsgUpdateParamsResponse {}