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codec.go
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codec.go
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package store
import (
"fmt"
"github.com/cosmos/cosmos-sdk/client/context"
"github.com/bnb-chain/node/wire"
)
// queryOrderBook queries the store for the serialized order book for a given pair.
func queryOrderBook(_ *wire.Codec, ctx context.CLIContext, pair string, levels int) (*[]byte, error) {
path := fmt.Sprintf("dex/orderbook/%s/%d", pair, levels)
bz, err := ctx.Query(path, nil)
if err != nil {
return nil, err
}
return &bz, nil
}
// decodeOrderBook decodes the order book to a set of OrderBookLevel structs
func decodeOrderBook(cdc *wire.Codec, bz *[]byte) (*OrderBook, error) {
var ob OrderBook
err := cdc.UnmarshalBinaryLengthPrefixed(*bz, &ob)
if err != nil {
return nil, err
}
return &ob, nil
}
// GetOrderBook decodes the order book from the serialized store
func GetOrderBook(cdc *wire.Codec, ctx context.CLIContext, pair string, levels int) (*OrderBook, error) {
bz, err := queryOrderBook(cdc, ctx, pair, levels)
if err != nil {
return nil, err
}
if bz == nil {
return nil, nil
}
book, err := decodeOrderBook(cdc, bz)
return book, err
}
func queryOpenOrders(cdc *wire.Codec, ctx context.CLIContext, pair string, addr string) (*[]byte, error) {
path := fmt.Sprintf("dex/openorders/%s/%s", pair, addr)
if bz, err := ctx.Query(path, nil); err != nil {
return nil, err
} else {
return &bz, nil
}
}
func DecodeOpenOrders(cdc *wire.Codec, bz *[]byte) ([]OpenOrder, error) {
openOrders := make([]OpenOrder, 0)
if err := cdc.UnmarshalBinaryLengthPrefixed(*bz, &openOrders); err != nil {
return nil, err
} else {
return openOrders, nil
}
}
func GetOpenOrders(cdc *wire.Codec, ctx context.CLIContext, pair string, addr string) ([]OpenOrder, error) {
if bz, err := queryOpenOrders(cdc, ctx, pair, addr); err != nil {
return nil, err
} else if bz == nil {
return []OpenOrder{}, nil
} else {
openOrders, err := DecodeOpenOrders(cdc, bz)
return openOrders, err
}
}