47 lines
1.3 KiB
Go
47 lines
1.3 KiB
Go
package keeper
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import (
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"fmt"
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abci "github.com/tendermint/tendermint/abci/types"
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"github.com/cosmos/cosmos-sdk/codec"
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sdk "github.com/cosmos/cosmos-sdk/types"
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"github.com/cosmos/cosmos-sdk/x/bank/internal/types"
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)
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const (
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// query balance path
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QueryBalance = "balances"
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)
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// NewQuerier returns a new sdk.Keeper instance.
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func NewQuerier(k Keeper) sdk.Querier {
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return func(ctx sdk.Context, path []string, req abci.RequestQuery) ([]byte, sdk.Error) {
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switch path[0] {
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case QueryBalance:
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return queryBalance(ctx, req, k)
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default:
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return nil, sdk.ErrUnknownRequest("unknown bank query endpoint")
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}
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}
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}
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// queryBalance fetch an account's balance for the supplied height.
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// Height and account address are passed as first and second path components respectively.
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func queryBalance(ctx sdk.Context, req abci.RequestQuery, k Keeper) ([]byte, sdk.Error) {
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var params types.QueryBalanceParams
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if err := types.ModuleCdc.UnmarshalJSON(req.Data, ¶ms); err != nil {
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return nil, sdk.ErrInternal(fmt.Sprintf("failed to parse params: %s", err))
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}
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bz, err := codec.MarshalJSONIndent(types.ModuleCdc, k.GetCoins(ctx, params.Address))
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if err != nil {
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return nil, sdk.ErrInternal(sdk.AppendMsgToErr("could not marshal result to JSON", err.Error()))
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}
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return bz, nil
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}
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