Add BankMsg::Burn to CosmosMsg

[ethanfrey]

A dev wanted to add this as a custom callback, but I think this would be better to add directly to Bank.

#[derive(Serialize, Deserialize, Clone, Debug, PartialEq, JsonSchema)]
#[serde(rename_all = "snake_case")]
pub enum BankMsg {
    Send {
        to_address: HumanAddr,
        amount: Vec<Coin>,
    },
    Burn {
        amount: Vec<Coin>,
    },
}

[webmaster128]

Where is this implemented in the SDK? The bank module does not seem to have a message type like this: https://github.com/cosmos/cosmos-sdk/blob/v0.42.1/proto/cosmos/bank/v1beta1/tx.proto#L10-L17

[ethanfrey]

No there is no such message. There is also no sdk message equivalent to IbcMsg::SendPacket (we need to call the keepers directly).

However, this has been requested before and the functionality is exposed on the bank keeper: https://docs.cosmos.network/master/modules/bank/02_keepers.html#basekeeper