Struct ModuleParams

pub struct ModuleParams {
    pub denom_creation_gas_consume: u64,
}

ModuleParams defines the parameters for the tokenfactory module.

On Denom Creation Costs

We’d like for fees to be paid by the user/signer of a ransaction, but in many casess, token creation is abstracted away behind a smart contract. Setting a nonzero denom_creation_fee would force each contract to handle collecting and paying a fees for denom (factory/{contract-addr}/{subdenom}) creation on behalf of the end user.

For IBC token transfers, it’s unclear who should pay the fee—the contract, the relayer, or the original sender?

“Charging fees will mess up composability, the same way Terra transfer tax caused all kinds of headaches for contract devs.” - @ethanfrey

Recommended Solution

Have the end user (signer) pay fees directly in the form of higher gas costs. This way, contracts won’t need to handle collecting or paying fees. And for IBC, the gas costs are already paid by the original sender and can be estimated by the relayer. It’s easier to tune gas costs to make spam prohibitively expensive since there are per-transaction and per-block gas limits.

See https://github.com/CosmWasm/token-factory/issues/11 for the initial discussion of the issue with @ethanfrey and @valardragon.

Fields

denom_creation_gas_consume: u64

Adds gas consumption to the execution of MsgCreateDenom as a method of spam prevention. Defaults to 10 NIBI.

Trait Implementations

impl Clone for ModuleParams

fn clone(&self) -> ModuleParams

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for ModuleParams

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for ModuleParams

fn default() -> Self

Returns the “default value” for a type.

impl Message for ModuleParams

fn encoded_len(&self) -> usize

Returns the encoded length of the message without a length delimiter.

fn clear(&mut self)

Clears the message, resetting all fields to their default.

fn encode<B>(&self, buf: &mut B) -> Result<(), EncodeError>

where B: BufMut, Self: Sized,

Encodes the message to a buffer.

fn encode_to_vec(&self) -> Vec<u8>

where Self: Sized,

Encodes the message to a newly allocated buffer.

fn encode_length_delimited<B>(&self, buf: &mut B) -> Result<(), EncodeError>

where B: BufMut, Self: Sized,

Encodes the message with a length-delimiter to a buffer.

fn encode_length_delimited_to_vec(&self) -> Vec<u8>

where Self: Sized,

Encodes the message with a length-delimiter to a newly allocated buffer.

fn decode<B>(buf: B) -> Result<Self, DecodeError>

where B: Buf, Self: Default,

Decodes an instance of the message from a buffer.

fn decode_length_delimited<B>(buf: B) -> Result<Self, DecodeError>

where B: Buf, Self: Default,

Decodes a length-delimited instance of the message from the buffer.

fn merge<B>(&mut self, buf: B) -> Result<(), DecodeError>

where B: Buf, Self: Sized,

Decodes an instance of the message from a buffer, and merges it into self.

fn merge_length_delimited<B>(&mut self, buf: B) -> Result<(), DecodeError>

where B: Buf, Self: Sized,

Decodes a length-delimited instance of the message from buffer, and merges it into self.

impl PartialEq for ModuleParams

fn eq(&self, other: &ModuleParams) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for ModuleParams