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grpc_query.go
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grpc_query.go
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package keeper
import (
"context"
"github.com/cosmos/cosmos-sdk/store/prefix"
sdk "github.com/cosmos/cosmos-sdk/types"
"github.com/cosmos/cosmos-sdk/types/query"
"google.golang.org/grpc/codes"
"google.golang.org/grpc/status"
"github.com/cosmicbet/ledger/x/wta/types"
)
var _ types.QueryServer = querier{}
// querier is used as Keeper will have duplicate methods if used directly, and gRPC names take precedence over keeper
type querier struct {
Keeper
}
// NewMsgServerImpl returns an implementation of the wta QueryServer interface
// for the provided Keeper.
func NewQuerierImpl(k Keeper) types.QueryServer {
return querier{Keeper: k}
}
// Tickets queries all tickets for the next draw
func (k querier) Tickets(ctx context.Context, req *types.QueryTicketsRequest) (*types.QueryTicketsResponse, error) {
if req == nil {
return nil, status.Error(codes.InvalidArgument, "empty request")
}
sdkCtx := sdk.UnwrapSDKContext(ctx)
store := sdkCtx.KVStore(k.storeKey)
ticketsStore := prefix.NewStore(store, types.TicketsStorePrefix)
var tickets []types.Ticket
pageRes, err := query.FilteredPaginate(ticketsStore, req.Pagination, func(_ []byte, value []byte, accumulate bool) (bool, error) {
ticket, err := types.UnmarshalTicket(k.cdc, value)
if err != nil {
return false, err
}
if accumulate {
tickets = append(tickets, ticket)
}
return true, nil
})
if err != nil {
return nil, status.Error(codes.Internal, err.Error())
}
return &types.QueryTicketsResponse{Tickets: tickets, Pagination: pageRes}, err
}
// NextDraw queries the details of the next draw
func (k querier) NextDraw(ctx context.Context, req *types.QueryNextDrawRequest) (*types.QueryNextDrawResponse, error) {
if req == nil {
return nil, status.Error(codes.InvalidArgument, "empty request")
}
sdkCtx := sdk.UnwrapSDKContext(ctx)
draw := k.GetCurrentDraw(sdkCtx)
return &types.QueryNextDrawResponse{Draw: draw}, nil
}
// PastDraws queries the details of the past draws
func (k querier) PastDraws(ctx context.Context, req *types.QueryPastDrawsRequest) (*types.QueryPastDrawsResponse, error) {
if req == nil {
return nil, status.Error(codes.InvalidArgument, "empty request")
}
sdkCtx := sdk.UnwrapSDKContext(ctx)
store := sdkCtx.KVStore(k.storeKey)
drawsStore := prefix.NewStore(store, types.HistoricalDrawStorePrefix)
var draws []types.HistoricalDrawData
pageRes, err := query.FilteredPaginate(drawsStore, req.Pagination, func(_ []byte, value []byte, accumulate bool) (bool, error) {
data, err := types.UnmarshalHistoricalDraw(k.cdc, value)
if err != nil {
return false, err
}
if accumulate {
draws = append(draws, data)
}
return true, nil
})
if err != nil {
return nil, status.Error(codes.Internal, err.Error())
}
return &types.QueryPastDrawsResponse{Draws: draws, Pagination: pageRes}, nil
}
// Params queries the currently stored parameters
func (k Keeper) Params(ctx context.Context, req *types.QueryParamsRequest) (*types.QueryParamsResponse, error) {
if req == nil {
return nil, status.Error(codes.InvalidArgument, "empty request")
}
sdkCtx := sdk.UnwrapSDKContext(ctx)
return &types.QueryParamsResponse{
DistributionParams: k.GetDistributionParams(sdkCtx),
DrawParams: k.GetDrawParams(sdkCtx),
TicketParams: k.GetTicketParams(sdkCtx),
}, nil
}