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The IBC transfer application module contains the following parameters:
NameTypeDefault Value
SendEnabledbooltrue
ReceiveEnabledbooltrue
The IBC transfer module stores its parameters under its StoreKey

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

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

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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

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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 {}