/
grpc_query.go
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/
grpc_query.go
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// Copyright 2022 Evmos Foundation
// This file is part of the Evmos Network packages.
//
// Evmos is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The Evmos packages are distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the Evmos packages. If not, see https://github.com/evmos/evmos/blob/main/LICENSE
package keeper
import (
"context"
"google.golang.org/grpc/codes"
"google.golang.org/grpc/status"
"github.com/cosmos/cosmos-sdk/store/prefix"
sdk "github.com/cosmos/cosmos-sdk/types"
"github.com/cosmos/cosmos-sdk/types/query"
evmostypes "github.com/settlus/chain/evmos/types"
"github.com/settlus/chain/evmos/x/erc20/types"
)
var _ types.QueryServer = Keeper{}
// TokenPairs returns all registered pairs
func (k Keeper) TokenPairs(c context.Context, req *types.QueryTokenPairsRequest) (*types.QueryTokenPairsResponse, error) {
if req == nil {
return nil, status.Error(codes.InvalidArgument, "empty request")
}
ctx := sdk.UnwrapSDKContext(c)
var pairs []types.TokenPair
store := prefix.NewStore(ctx.KVStore(k.storeKey), types.KeyPrefixTokenPair)
pageRes, err := query.Paginate(store, req.Pagination, func(_, value []byte) error {
var pair types.TokenPair
if err := k.cdc.Unmarshal(value, &pair); err != nil {
return err
}
pairs = append(pairs, pair)
return nil
})
if err != nil {
return nil, status.Error(codes.Internal, err.Error())
}
return &types.QueryTokenPairsResponse{
TokenPairs: pairs,
Pagination: pageRes,
}, nil
}
// TokenPair returns a given registered token pair
func (k Keeper) TokenPair(c context.Context, req *types.QueryTokenPairRequest) (*types.QueryTokenPairResponse, error) {
if req == nil {
return nil, status.Error(codes.InvalidArgument, "empty request")
}
ctx := sdk.UnwrapSDKContext(c)
// check if the token is a hex address, if not, check if it is a valid SDK
// denom
if err := evmostypes.ValidateAddress(req.Token); err != nil {
if err := sdk.ValidateDenom(req.Token); err != nil {
return nil, status.Errorf(
codes.InvalidArgument,
"invalid format for token %s, should be either hex ('0x...') cosmos denom", req.Token,
)
}
}
id := k.GetTokenPairID(ctx, req.Token)
if len(id) == 0 {
return nil, status.Errorf(codes.NotFound, "token pair with token '%s'", req.Token)
}
pair, found := k.GetTokenPair(ctx, id)
if !found {
return nil, status.Errorf(codes.NotFound, "token pair with token '%s'", req.Token)
}
return &types.QueryTokenPairResponse{TokenPair: pair}, nil
}
// Params returns the params of the erc20 module
func (k Keeper) Params(c context.Context, _ *types.QueryParamsRequest) (*types.QueryParamsResponse, error) {
ctx := sdk.UnwrapSDKContext(c)
params := k.GetParams(ctx)
return &types.QueryParamsResponse{Params: params}, nil
}