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

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package pricefeed
import (
"fmt"
sdk "github.com/cosmos/cosmos-sdk/types"
)
// NewHandler handles all pricefeed type messages
func NewHandler(k Keeper) sdk.Handler {
return func(ctx sdk.Context, msg sdk.Msg) sdk.Result {
switch msg := msg.(type) {
case MsgPostPrice:
return HandleMsgPostPrice(ctx, k, msg)
default:
errMsg := fmt.Sprintf("unrecognized pricefeed message type: %T", msg)
return sdk.ErrUnknownRequest(errMsg).Result()
}
}
}
// 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 {
_, err := k.GetOracle(ctx, msg.MarketID, msg.From)
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if err != nil {
return err.Result()
}
_, err = k.SetPrice(ctx, msg.From, msg.MarketID, msg.Price, msg.Expiry)
if err != nil {
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return err.Result()
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}
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()}
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}