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querier.go
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querier.go
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package keepers
import (
"fmt"
"github.com/cosmos/cosmos-sdk/codec"
sdk "github.com/cosmos/cosmos-sdk/types"
abci "github.com/tendermint/tendermint/abci/types"
"github.com/coinexchain/cet-sdk/modules/asset/internal/types"
)
// NewQuerier - creates a querier for asset REST endpoints
func NewQuerier(keeper Keeper) sdk.Querier {
return func(ctx sdk.Context, path []string, req abci.RequestQuery) ([]byte, sdk.Error) {
switch path[0] {
case types.QueryParameters:
return queryParameters(ctx, keeper)
case types.QueryToken:
return queryToken(ctx, req, keeper)
case types.QueryTokenList:
return queryAllTokenList(ctx, req, keeper)
case types.QueryWhitelist:
return queryWhitelist(ctx, req, keeper)
case types.QueryForbiddenAddr:
return queryForbiddenAddr(ctx, req, keeper)
case types.QueryReservedSymbols:
return queryReservedSymbols()
default:
return nil, sdk.ErrUnknownRequest("unknown asset query endpoint")
}
}
}
func queryParameters(ctx sdk.Context, k Keeper) ([]byte, sdk.Error) {
params := k.GetParams(ctx)
res, err := codec.MarshalJSONIndent(types.ModuleCdc, params)
if err != nil {
return nil, sdk.ErrInternal(sdk.AppendMsgToErr("could not marshal result to JSON", err.Error()))
}
return res, nil
}
func queryToken(ctx sdk.Context, req abci.RequestQuery, keeper TokenKeeper) ([]byte, sdk.Error) {
var params types.QueryTokenParams
if err := types.ModuleCdc.UnmarshalJSON(req.Data, ¶ms); err != nil {
return nil, sdk.ErrInternal(fmt.Sprintf("failed to parse params: %s", err))
}
token := keeper.GetToken(ctx, params.Symbol)
if token == nil {
return nil, types.ErrTokenNotFound(params.Symbol)
}
bz, err := codec.MarshalJSONIndent(types.ModuleCdc, token)
if err != nil {
return nil, sdk.ErrInternal(sdk.AppendMsgToErr("could not marshal result to JSON", err.Error()))
}
return bz, nil
}
func queryAllTokenList(ctx sdk.Context, req abci.RequestQuery, keeper TokenKeeper) ([]byte, sdk.Error) {
bz, err := codec.MarshalJSONIndent(types.ModuleCdc, keeper.GetAllTokens(ctx))
if err != nil {
return nil, sdk.ErrInternal(sdk.AppendMsgToErr("could not marshal result to JSON", err.Error()))
}
return bz, nil
}
func queryWhitelist(ctx sdk.Context, req abci.RequestQuery, keeper TokenKeeper) ([]byte, sdk.Error) {
var params types.QueryWhitelistParams
if err := types.ModuleCdc.UnmarshalJSON(req.Data, ¶ms); err != nil {
return nil, sdk.ErrInternal(fmt.Sprintf("failed to parse params: %s", err))
}
bz, err := codec.MarshalJSONIndent(types.ModuleCdc, keeper.GetWhitelist(ctx, params.Symbol))
if err != nil {
return nil, sdk.ErrInternal(sdk.AppendMsgToErr("could not marshal result to JSON", err.Error()))
}
return bz, nil
}
func queryForbiddenAddr(ctx sdk.Context, req abci.RequestQuery, keeper TokenKeeper) ([]byte, sdk.Error) {
var params types.QueryForbiddenAddrParams
if err := types.ModuleCdc.UnmarshalJSON(req.Data, ¶ms); err != nil {
return nil, sdk.ErrInternal(fmt.Sprintf("failed to parse params: %s", err))
}
bz, err := codec.MarshalJSONIndent(types.ModuleCdc, keeper.GetForbiddenAddresses(ctx, params.Symbol))
if err != nil {
return nil, sdk.ErrInternal(sdk.AppendMsgToErr("could not marshal result to JSON", err.Error()))
}
return bz, nil
}
func queryReservedSymbols() ([]byte, sdk.Error) {
reserved := types.GetReservedSymbols()
var s = ""
for _, symbol := range reserved {
s = s + symbol + ", "
}
res := "[" + s + "]"
bz, err := codec.MarshalJSONIndent(types.ModuleCdc, res)
if err != nil {
return nil, sdk.ErrInternal(sdk.AppendMsgToErr("could not marshal result to JSON", err.Error()))
}
return bz, nil
}