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keeper.go
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/
keeper.go
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package keeper
import (
"encoding/hex"
"github.com/cometbft/cometbft/libs/log"
errorsmod "cosmossdk.io/errors"
"github.com/cosmos/cosmos-sdk/codec"
storetypes "github.com/cosmos/cosmos-sdk/store/types"
sdk "github.com/cosmos/cosmos-sdk/types"
"github.com/irisnet/irismod/modules/random/types"
)
// Keeper defines the random module Keeper
type Keeper struct {
cdc codec.Codec
storeKey storetypes.StoreKey
bankKeeper types.BankKeeper
serviceKeeper types.ServiceKeeper
}
// NewKeeper returns a new random keeper
func NewKeeper(
cdc codec.Codec,
key storetypes.StoreKey,
bankKeeper types.BankKeeper,
serviceKeeper types.ServiceKeeper,
) Keeper {
keeper := Keeper{
cdc: cdc,
storeKey: key,
bankKeeper: bankKeeper,
serviceKeeper: serviceKeeper,
}
_ = serviceKeeper.RegisterResponseCallback(types.ModuleName, keeper.HandlerResponse)
_ = serviceKeeper.RegisterStateCallback(types.ModuleName, keeper.HandlerStateChanged)
return keeper
}
// Logger returns a module-specific logger.
func (k Keeper) Logger(ctx sdk.Context) log.Logger {
return ctx.Logger().With("module", types.ModuleName)
}
// GetCdc returns the cdc
func (k Keeper) GetCdc() codec.BinaryCodec {
return k.cdc
}
// RequestRandom requests a random number
func (k Keeper) RequestRandom(
ctx sdk.Context, consumer sdk.AccAddress,
blockInterval uint64, oracle bool,
serviceFeeCap sdk.Coins,
) (types.Request, error) {
currentHeight := ctx.BlockHeight()
destHeight := currentHeight + int64(blockInterval)
// get tx hash
txHash := types.SHA256(ctx.TxBytes())
var request types.Request
if oracle {
// create paused request context
requestContextID, err := k.RequestService(ctx, consumer, serviceFeeCap)
if err != nil {
return request, err
}
// build request
request = types.NewRequest(
currentHeight,
consumer.String(),
hex.EncodeToString(txHash),
oracle,
serviceFeeCap,
requestContextID.String(),
)
} else {
// build request
request = types.NewRequest(currentHeight, consumer.String(), hex.EncodeToString(txHash), oracle, nil, "")
}
// generate the request id
reqID := types.GenerateRequestID(request)
// add to the queue
k.EnqueueRandomRequest(ctx, destHeight, reqID, request)
return request, nil
}
// SetRandom stores the random number
func (k Keeper) SetRandom(ctx sdk.Context, reqID []byte, random types.Random) {
store := ctx.KVStore(k.storeKey)
bz := k.cdc.MustMarshal(&random)
store.Set(types.KeyRandom(reqID), bz)
}
// EnqueueRandomRequest enqueues the random number request
func (k Keeper) EnqueueRandomRequest(
ctx sdk.Context,
height int64,
reqID []byte,
request types.Request,
) {
store := ctx.KVStore(k.storeKey)
bz := k.cdc.MustMarshal(&request)
store.Set(types.KeyRandomRequestQueue(height, reqID), bz)
}
// DequeueRandomRequest removes the random number request by the specified height and request id
func (k Keeper) DequeueRandomRequest(ctx sdk.Context, height int64, reqID []byte) {
store := ctx.KVStore(k.storeKey)
store.Delete(types.KeyRandomRequestQueue(height, reqID))
}
// SetOracleRandRequest stores the oracle random number request
func (k Keeper) SetOracleRandRequest(
ctx sdk.Context,
requestContextID []byte,
request types.Request,
) {
store := ctx.KVStore(k.storeKey)
bz := k.cdc.MustMarshal(&request)
store.Set(types.KeyOracleRandomRequest(requestContextID), bz)
}
// GetOracleRandRequest retrieves the oracle random number request by the specified request id
func (k Keeper) GetOracleRandRequest(
ctx sdk.Context,
requestContextID []byte,
) (types.Request, error) {
store := ctx.KVStore(k.storeKey)
bz := store.Get(types.KeyOracleRandomRequest(requestContextID))
if bz == nil {
return types.Request{}, errorsmod.Wrap(
types.ErrInvalidRequestContextID,
hex.EncodeToString(requestContextID),
)
}
var request types.Request
k.cdc.MustUnmarshal(bz, &request)
return request, nil
}
// DeleteOracleRandRequest deletes an oracle random number request
func (k Keeper) DeleteOracleRandRequest(ctx sdk.Context, requestContextID []byte) {
store := ctx.KVStore(k.storeKey)
store.Delete(types.KeyOracleRandomRequest(requestContextID))
}
// GetRandom retrieves the random number by the specified request id
func (k Keeper) GetRandom(ctx sdk.Context, reqID []byte) (types.Random, error) {
store := ctx.KVStore(k.storeKey)
bz := store.Get(types.KeyRandom(reqID))
if bz == nil {
return types.Random{}, errorsmod.Wrap(types.ErrInvalidReqID, hex.EncodeToString(reqID))
}
var random types.Random
k.cdc.MustUnmarshal(bz, &random)
return random, nil
}
// IterateRandoms iterates through all the random numbers
func (k Keeper) IterateRandoms(ctx sdk.Context, op func(r types.Random) (stop bool)) {
store := ctx.KVStore(k.storeKey)
iterator := sdk.KVStorePrefixIterator(store, types.RandomKey)
defer iterator.Close()
for ; iterator.Valid(); iterator.Next() {
var random types.Random
k.cdc.MustUnmarshal(iterator.Value(), &random)
if stop := op(random); stop {
break
}
}
}
// IterateRandomRequestQueueByHeight iterates through the random number request queue by the specified height
func (k Keeper) IterateRandomRequestQueueByHeight(ctx sdk.Context, height int64) sdk.Iterator {
store := ctx.KVStore(k.storeKey)
return sdk.KVStorePrefixIterator(store, types.KeyRandomRequestQueueSubspace(height))
}
// IterateRandomRequestQueue iterates through the random number request queue
func (k Keeper) IterateRandomRequestQueue(
ctx sdk.Context,
op func(h int64, reqID []byte, r types.Request) (stop bool),
) {
store := ctx.KVStore(k.storeKey)
iterator := sdk.KVStorePrefixIterator(store, types.RandomRequestQueueKey)
defer iterator.Close()
for ; iterator.Valid(); iterator.Next() {
height := sdk.BigEndianToUint64(iterator.Key()[1:9])
reqID := iterator.Key()[9:]
var request types.Request
k.cdc.MustUnmarshal(iterator.Value(), &request)
if stop := op(int64(height), reqID, request); stop {
break
}
}
}