0g-chain/x/auction/keeper/querier.go
Kevin Davis 15a7dc610e
[R4R] feat: Fetch auctions from historical state (#649)
* feat: query old blocks for auctions

* fix: add next auction id to querier

* fix: set boolean when found

* fix: use correct query route and params

* apply suggestions from review comments
2020-09-16 14:58:11 -04:00

137 lines
4.0 KiB
Go

package keeper
import (
abci "github.com/tendermint/tendermint/abci/types"
"github.com/cosmos/cosmos-sdk/client"
"github.com/cosmos/cosmos-sdk/codec"
sdk "github.com/cosmos/cosmos-sdk/types"
sdkerrors "github.com/cosmos/cosmos-sdk/types/errors"
"github.com/kava-labs/kava/x/auction/types"
)
// NewQuerier is the module level router for state queries
func NewQuerier(keeper Keeper) sdk.Querier {
return func(ctx sdk.Context, path []string, req abci.RequestQuery) (res []byte, err error) {
switch path[0] {
case types.QueryGetAuction:
return queryAuction(ctx, req, keeper)
case types.QueryGetAuctions:
return queryAuctions(ctx, req, keeper)
case types.QueryGetParams:
return queryGetParams(ctx, req, keeper)
case types.QueryNextAuctionID:
return queryNextAuctionID(ctx, req, keeper)
default:
return nil, sdkerrors.Wrapf(sdkerrors.ErrUnknownRequest, "unknown %s query endpoint", types.ModuleName)
}
}
}
func queryAuction(ctx sdk.Context, req abci.RequestQuery, keeper Keeper) ([]byte, error) {
// Decode request
var requestParams types.QueryAuctionParams
err := types.ModuleCdc.UnmarshalJSON(req.Data, &requestParams)
if err != nil {
return nil, sdkerrors.Wrap(sdkerrors.ErrJSONUnmarshal, err.Error())
}
// Lookup auction
auction, found := keeper.GetAuction(ctx, requestParams.AuctionID)
if !found {
return nil, sdkerrors.Wrapf(types.ErrAuctionNotFound, "%d", requestParams.AuctionID)
}
// Encode results
bz, err := codec.MarshalJSONIndent(keeper.cdc, auction)
if err != nil {
return nil, sdkerrors.Wrap(sdkerrors.ErrJSONMarshal, err.Error())
}
return bz, nil
}
func queryAuctions(ctx sdk.Context, req abci.RequestQuery, keeper Keeper) ([]byte, error) {
var params types.QueryAllAuctionParams
err := types.ModuleCdc.UnmarshalJSON(req.Data, &params)
if err != nil {
return nil, sdkerrors.Wrap(sdkerrors.ErrJSONUnmarshal, err.Error())
}
unfilteredAuctions := keeper.GetAllAuctions(ctx)
auctions := filterAuctions(ctx, unfilteredAuctions, params)
if auctions == nil {
auctions = types.Auctions{}
}
bz, err := codec.MarshalJSONIndent(keeper.cdc, auctions)
if err != nil {
return nil, sdkerrors.Wrap(sdkerrors.ErrJSONMarshal, err.Error())
}
return bz, nil
}
// query params in the auction store
func queryGetParams(ctx sdk.Context, req abci.RequestQuery, keeper Keeper) ([]byte, error) {
// Get params
params := keeper.GetParams(ctx)
// Encode results
bz, err := codec.MarshalJSONIndent(keeper.cdc, params)
if err != nil {
return nil, sdkerrors.Wrap(sdkerrors.ErrJSONMarshal, err.Error())
}
return bz, nil
}
// filterAuctions retrieves auctions filtered by a given set of params.
// If no filters are provided, all auctions will be returned in paginated form.
func filterAuctions(ctx sdk.Context, auctions types.Auctions, params types.QueryAllAuctionParams) types.Auctions {
filteredAuctions := make(types.Auctions, 0, len(auctions))
for _, auc := range auctions {
matchType, matchDenom, matchPhase := true, true, true
// match auction type (if supplied)
if len(params.Type) > 0 {
matchType = auc.GetType() == params.Type
}
// match auction denom (if supplied)
if len(params.Denom) > 0 {
matchDenom = auc.GetBid().Denom == params.Denom || auc.GetLot().Denom == params.Denom
}
// match auction phase (if supplied)
if len(params.Phase) > 0 {
matchPhase = auc.GetPhase() == params.Phase
}
if matchType && matchDenom && matchPhase {
filteredAuctions = append(filteredAuctions, auc)
}
}
start, end := client.Paginate(len(filteredAuctions), params.Page, params.Limit, 100)
if start < 0 || end < 0 {
filteredAuctions = types.Auctions{}
} else {
filteredAuctions = filteredAuctions[start:end]
}
return filteredAuctions
}
func queryNextAuctionID(ctx sdk.Context, req abci.RequestQuery, keeper Keeper) ([]byte, error) {
nextAuctionID, _ := keeper.GetNextAuctionID(ctx)
bz, err := types.ModuleCdc.MarshalJSON(nextAuctionID)
if err != nil {
return nil, sdkerrors.Wrap(sdkerrors.ErrJSONUnmarshal, err.Error())
}
return bz, nil
}