mirror of
https://github.com/0glabs/0g-chain.git
synced 2024-12-25 15:55:18 +00:00
84 lines
2.7 KiB
Go
84 lines
2.7 KiB
Go
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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/kava-labs/kava/x/cdp/types"
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)
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func NewQuerier(keeper Keeper) sdk.Querier {
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return func(ctx sdk.Context, path []string, req abci.RequestQuery) (res []byte, err sdk.Error) {
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switch path[0] {
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case types.QueryGetCdps:
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return queryGetCdps(ctx, req, keeper)
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case types.QueryGetParams:
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return queryGetParams(ctx, req, keeper)
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default:
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return nil, sdk.ErrUnknownRequest("unknown cdp query endpoint")
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}
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}
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}
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// queryGetCdps fetches CDPs, optionally filtering by any of the query params (in QueryCdpsParams).
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// While CDPs do not have an ID, this method can be used to get one CDP by specifying the collateral and owner.
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func queryGetCdps(ctx sdk.Context, req abci.RequestQuery, keeper Keeper) ([]byte, sdk.Error) {
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// Decode request
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var requestParams types.QueryCdpsParams
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err := keeper.cdc.UnmarshalJSON(req.Data, &requestParams)
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if 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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// Get CDPs
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var cdps types.CDPs
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if len(requestParams.Owner) != 0 {
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if len(requestParams.CollateralDenom) != 0 {
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// owner and collateral specified - get a single CDP
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cdp, found := keeper.GetCDP(ctx, requestParams.Owner, requestParams.CollateralDenom)
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if !found {
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cdp = types.CDP{Owner: requestParams.Owner, CollateralDenom: requestParams.CollateralDenom, CollateralAmount: sdk.ZeroInt(), Debt: sdk.ZeroInt()}
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}
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cdps = types.CDPs{cdp}
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} else {
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// owner, but no collateral specified - get all CDPs for one address
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return nil, sdk.ErrInternal("getting all CDPs belonging to one owner not implemented")
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}
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} else {
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// owner not specified -- get all CDPs or all CDPs of one collateral type, optionally filtered by price
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var errSdk sdk.Error // := doesn't work here
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cdps, errSdk = keeper.GetCDPs(ctx, requestParams.CollateralDenom, requestParams.UnderCollateralizedAt)
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if errSdk != nil {
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return nil, errSdk
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}
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}
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// Encode results
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bz, err := codec.MarshalJSONIndent(keeper.cdc, cdps)
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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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// queryGetParams fetches the cdp module parameters
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// TODO does this need to exist? Can you use cliCtx.QueryStore instead?
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func queryGetParams(ctx sdk.Context, req abci.RequestQuery, keeper Keeper) ([]byte, sdk.Error) {
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// Get params
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params := keeper.GetParams(ctx)
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// Encode results
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bz, err := codec.MarshalJSONIndent(keeper.cdc, params)
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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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