MsgPrivilegedExecuteContract

MsgPrivilegedExecuteContract defines a method for executing a Cosmwasm contract from the exchange module with privileged capabilities.

type MsgPrivilegedExecuteContract struct {
    Sender string
    // funds defines the user's bank coins used to fund the execution (e.g. 100inj).
    Funds github_com_cosmos_cosmos_sdk_types.Coins
    // contract_address defines the contract address to execute
    ContractAddress string
    // data defines the call data used when executing the contract
    Data string
}

Fields description

• Sender describes the creator of this msg.
• Funds defines the user's bank coins used to fund the execution (e.g. 100inj).
• ContractAddress defines the contract address to execute.
• Data defines the call data used when executing the contract, see further details below.

Contract Interface

If you want to enable privileged actions on your contract, you must implement the following execute method:

InjectiveExec {
    origin: String,
    name: String,
    args: MyArgs,
}

• The origin field is the address of the user who sent the privileged action. You don't have to set this field yourself, it will be set by the exchange module.
• The name field is the name of the privileged action. You can define these to be whatever you want.
• The args field is the arguments of the privileged action. You can define these to be whatever you want.

A complete definition of the Data string in Golang is:

type ExecutionData struct {
    Origin string      `json:"origin"`
    Name   string      `json:"name"`
    MyArgs   interface{} `json:"args"`
}

A user can then call the privileged action by sending a MsgPrivilegedExecuteContract with the following data:

{
    sender: "inj...",
    funds: "1000000000000000000inj",
    contract_address: "inj...",
    data: {
        origin: "inj...",
        name: "my_privileged_action",
        args: {
            ...
        }
    }
}

Supported Privileged Actions

There are currently two supported privileged actions:

type PrivilegedAction struct {
    SyntheticTrade   *SyntheticTradeAction `json:"synthetic_trade"`
    PositionTransfer *PositionTransfer     `json:"position_transfer"`
}

These privileged actions must be set inside the Cosmwasm response data field, e.g.:

let privileged_action = PrivilegedAction {
    synthetic_trade: None,
    position_transfer: position_transfer_action,
};
response = response.set_data(to_binary(&privileged_action)?);

PositionTransfer

The position transfer allows a contract to transfer a derivative position from its own subaccount to a user's subaccount. The position may not be liquidable. Solely the receiver pays a taker trading fee deducted from his balances.

Currently only transfers from the contract's subaccount to a user's subaccount are supported.

type PositionTransfer struct {
    MarketID                common.Hash `json:"market_id"`
    SourceSubaccountID      common.Hash `json:"source_subaccount_id"`
    DestinationSubaccountID common.Hash `json:"destination_subaccount_id"`
    Quantity                sdk.Dec     `json:"quantity"`
}

SyntheticTrade

The synthetic trade allows a contract to execute a synthetic trade on behalf of a user for derivative markets. This is not touching the orderbook and is purely a synthetic trade. Taker trading fees still apply. The subaccount ids must be set to the contract's subaccount id and the user's subaccount id.

type SyntheticTradeAction struct {
    UserTrades     []*SyntheticTrade `json:"user_trades"`
    ContractTrades []*SyntheticTrade `json:"contract_trades"`
}

type SyntheticTrade struct {
    MarketID     common.Hash `json:"market_id"`
    SubaccountID common.Hash `json:"subaccount_id"`
    IsBuy        bool        `json:"is_buy"`
    Quantity     sdk.Dec     `json:"quantity"`
    Price        sdk.Dec     `json:"price"`
    Margin       sdk.Dec     `json:"margin"`
}