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abci.go
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abci.go
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package random
import (
"encoding/hex"
"fmt"
sdk "github.com/cosmos/cosmos-sdk/types"
"github.com/furynet/furymod/modules/random/keeper"
"github.com/furynet/furymod/modules/random/types"
)
// BeginBlocker handles block beginning logic for random
func BeginBlocker(ctx sdk.Context, k keeper.Keeper) {
currentTimestamp := ctx.BlockHeader().Time.Unix()
lastBlockHeight := ctx.BlockHeight() - 1
lastBlockHash := ctx.BlockHeader().LastBlockId.Hash
// get pending random number requests for lastBlockHeight
rqIterator := k.IterateRandomRequestQueueByHeight(ctx, lastBlockHeight)
defer rqIterator.Close()
handledNormalRandReqNum := 0
requestedOracleRandNum := 0
for ; rqIterator.Valid(); rqIterator.Next() {
var request types.Request
k.GetCdc().MustUnmarshal(rqIterator.Value(), &request)
consumer, _ := sdk.AccAddressFromBech32(request.Consumer)
serviceContextID, _ := hex.DecodeString(request.ServiceContextID)
if request.Oracle {
// get the request id
reqID := types.GenerateRequestID(request)
if err := k.StartRequestContext(ctx, serviceContextID, consumer); err == nil {
k.SetOracleRandRequest(ctx, serviceContextID, request)
requestedOracleRandNum++
ctx.EventManager().EmitEvent(
sdk.NewEvent(
types.EventTypeRequestService,
sdk.NewAttribute(types.AttributeKeyRequestID, hex.EncodeToString(reqID)),
sdk.NewAttribute(types.AttributeKeyRequestContextID, request.ServiceContextID),
),
)
} else {
ctx.Logger().Info(fmt.Sprintf("start service error : %s", err.Error()))
}
k.DequeueRandomRequest(ctx, lastBlockHeight, reqID)
} else {
// get the request id
reqID := types.GenerateRequestID(request)
// generate a random number
random := types.MakePRNG(lastBlockHash, currentTimestamp, consumer, nil, false).GetRand()
k.SetRandom(ctx, reqID, types.NewRandom(request.TxHash, lastBlockHeight, random.FloatString(types.RandPrec)))
// remove the request
k.DequeueRandomRequest(ctx, lastBlockHeight, reqID)
ctx.EventManager().EmitEvent(
sdk.NewEvent(
types.EventTypeGenerateRandom,
sdk.NewAttribute(types.AttributeKeyRequestID, hex.EncodeToString(reqID)),
sdk.NewAttribute(types.AttributeKeyRandom, random.String()),
),
)
handledNormalRandReqNum++
}
}
if handledNormalRandReqNum > 0 {
k.Logger(ctx).Info(fmt.Sprintf("%d random requests are handled", handledNormalRandReqNum))
}
}