0g-chain/x/pricefeed/handler.go

48 lines
1.2 KiB
Go
Raw Normal View History

2019-11-25 19:46:02 +00:00
package pricefeed
import (
sdk "github.com/cosmos/cosmos-sdk/types"
sdkerrors "github.com/cosmos/cosmos-sdk/types/errors"
2019-11-25 19:46:02 +00:00
)
// NewHandler handles all pricefeed type messages
func NewHandler(k Keeper) sdk.Handler {
return func(ctx sdk.Context, msg sdk.Msg) (*sdk.Result, error) {
2019-11-25 19:46:02 +00:00
switch msg := msg.(type) {
case MsgPostPrice:
return HandleMsgPostPrice(ctx, k, msg)
default:
return nil, sdkerrors.Wrapf(sdkerrors.ErrUnknownRequest, "unrecognized %s message type: %T", ModuleName, msg)
2019-11-25 19:46:02 +00:00
}
}
}
// price feed questions:
// do proposers need to post the round in the message? If not, how do we determine the round?
// HandleMsgPostPrice handles prices posted by oracles
func HandleMsgPostPrice(
ctx sdk.Context,
k Keeper,
msg MsgPostPrice) (*sdk.Result, error) {
2019-11-25 19:46:02 +00:00
_, err := k.GetOracle(ctx, msg.MarketID, msg.From)
2019-11-25 19:46:02 +00:00
if err != nil {
return nil, err
}
_, err = k.SetPrice(ctx, msg.From, msg.MarketID, msg.Price, msg.Expiry)
if err != nil {
return nil, err
2019-11-25 19:46:02 +00:00
}
ctx.EventManager().EmitEvent(
sdk.NewEvent(
sdk.EventTypeMessage,
sdk.NewAttribute(sdk.AttributeKeyModule, AttributeValueCategory),
sdk.NewAttribute(sdk.AttributeKeySender, msg.From.String()),
),
)
return &sdk.Result{Events: ctx.EventManager().Events()}, nil
2019-11-25 19:46:02 +00:00
}