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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,61 @@ | ||
| package ante | ||
|
|
||
| import ( | ||
| sdk "github.com/cosmos/cosmos-sdk/types" | ||
|
|
||
| "github.com/bandprotocol/bandchain/chain/x/oracle" | ||
| "github.com/bandprotocol/bandchain/chain/x/oracle/keeper" | ||
| ) | ||
|
|
||
| func checkValidReportMsg(ctx sdk.Context, oracleKeeper oracle.Keeper, msg sdk.Msg) bool { | ||
| rep, ok := msg.(oracle.MsgReportData) | ||
| if !ok { | ||
| return false | ||
| } | ||
| if !oracleKeeper.IsReporter(ctx, rep.Validator, rep.Reporter) { | ||
| return false | ||
| } | ||
| if rep.RequestID <= oracleKeeper.GetRequestLastExpired(ctx) { | ||
| return false | ||
| } | ||
|
|
||
| req, err := oracleKeeper.GetRequest(ctx, rep.RequestID) | ||
| if err != nil { | ||
| return false | ||
| } | ||
| if !keeper.ContainsVal(req.RequestedValidators, rep.Validator) { | ||
| return false | ||
| } | ||
| if len(rep.RawReports) != len(req.RawRequests) { | ||
| return false | ||
| } | ||
| for _, report := range rep.RawReports { | ||
| if !keeper.ContainsEID(req.RawRequests, report.ExternalID) { | ||
| return false | ||
| } | ||
| } | ||
| return true | ||
| } | ||
|
|
||
| // NewFeelessReportsAnteHandler returns a new ante handler that waives minimum gas price requirement | ||
| // if the incoming tx is a valid report transaction. | ||
| func NewFeelessReportsAnteHandler(ante sdk.AnteHandler, oracleKeeper oracle.Keeper) sdk.AnteHandler { | ||
| return func(ctx sdk.Context, tx sdk.Tx, simulate bool) (newCtx sdk.Context, err error) { | ||
| if ctx.IsCheckTx() && !simulate { | ||
| isValidReportTx := true | ||
| for _, msg := range tx.GetMsgs() { | ||
| if !checkValidReportMsg(ctx, oracleKeeper, msg) { | ||
| isValidReportTx = false | ||
| break | ||
| } | ||
| } | ||
| if isValidReportTx { | ||
| minGas := ctx.MinGasPrices() | ||
| newCtx, err := ante(ctx.WithMinGasPrices(sdk.DecCoins{}), tx, simulate) | ||
| // Set minimum gas price context and return context to caller. | ||
| return newCtx.WithMinGasPrices(minGas), err | ||
| } | ||
| } | ||
| return ante(ctx, tx, simulate) | ||
| } | ||
| } |
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