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 {
// TODO cleanup message validation and errors
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_, err := k.GetOracle(ctx, msg.AssetCode, msg.From)
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if err != nil {
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return ErrInvalidOracle(k.Codespace()).Result()
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}
k.SetPrice(ctx, msg.From, msg.AssetCode, msg.Price, msg.Expiry)
return sdk.Result{}
}