implemented backend wallets/ledger accounts listing

api/server/internal/server/walletapiimp/service.go

@@ -0,0 +1,115 @@
+package walletapiimp
+
+import (
+	"context"
+	"fmt"
+	"os"
+	"strings"
+	"time"
+
+	chaingatewayclient "github.com/tech/sendico/chain/gateway/client"
+	api "github.com/tech/sendico/pkg/api/http"
+	"github.com/tech/sendico/pkg/auth"
+	"github.com/tech/sendico/pkg/merrors"
+	"github.com/tech/sendico/pkg/mlogger"
+	"github.com/tech/sendico/pkg/mservice"
+	gatewayv1 "github.com/tech/sendico/pkg/proto/chain/gateway/v1"
+	eapi "github.com/tech/sendico/server/interface/api"
+	mutil "github.com/tech/sendico/server/internal/mutil/param"
+	"go.mongodb.org/mongo-driver/bson/primitive"
+	"go.uber.org/zap"
+)
+
+type WalletAPI struct {
+	logger                mlogger.Logger
+	chainGateway          chainWalletClient
+	enf                   auth.Enforcer
+	oph                   mutil.ParamHelper
+	wph                   mutil.ParamHelper
+	walletsPermissionRef  primitive.ObjectID
+	balancesPermissionRef primitive.ObjectID
+}
+
+type chainWalletClient interface {
+	ListManagedWallets(ctx context.Context, req *gatewayv1.ListManagedWalletsRequest) (*gatewayv1.ListManagedWalletsResponse, error)
+	GetWalletBalance(ctx context.Context, req *gatewayv1.GetWalletBalanceRequest) (*gatewayv1.GetWalletBalanceResponse, error)
+	Close() error
+}
+
+func (a *WalletAPI) Name() mservice.Type { return mservice.ChainWallets }
+
+func (a *WalletAPI) Finish(ctx context.Context) error {
+	if a.chainGateway != nil {
+		if err := a.chainGateway.Close(); err != nil {
+			a.logger.Warn("Failed to close chain gateway client", zap.Error(err))
+		}
+	}
+	return nil
+}
+
+func CreateAPI(apiCtx eapi.API) (*WalletAPI, error) {
+	p := &WalletAPI{
+		logger: apiCtx.Logger().Named(mservice.Wallets),
+		enf:    apiCtx.Permissions().Enforcer(),
+		oph:    mutil.CreatePH(mservice.Organizations),
+		wph:    mutil.CreatePH(mservice.Wallets),
+	}
+
+	walletsPolicy, err := apiCtx.Permissions().GetPolicyDescription(context.Background(), mservice.ChainWallets)
+	if err != nil {
+		p.logger.Warn("Failed to fetch chain wallets permission policy description", zap.Error(err))
+		return nil, err
+	}
+	p.walletsPermissionRef = walletsPolicy.ID
+
+	balancesPolicy, err := apiCtx.Permissions().GetPolicyDescription(context.Background(), mservice.ChainWalletBalances)
+	if err != nil {
+		p.logger.Warn("Failed to fetch chain wallet balances permission policy description", zap.Error(err))
+		return nil, err
+	}
+	p.balancesPermissionRef = balancesPolicy.ID
+
+	cfg := apiCtx.Config()
+	if cfg == nil {
+		p.logger.Error("Failed to fetch service configuration")
+		return nil, merrors.InvalidArgument("No configuration provided")
+	}
+	if err := p.initChainGateway(cfg.ChainGateway); err != nil {
+		p.logger.Error("Failed to initialize chain gateway client", zap.Error(err))
+		return nil, err
+	}
+
+	apiCtx.Register().AccountHandler(p.Name(), p.oph.AddRef("/"), api.Get, p.listWallets)
+	apiCtx.Register().AccountHandler(p.Name(), p.wph.AddRef(p.oph.AddRef("/"))+"/balance", api.Get, p.getWalletBalance)
+
+	return p, nil
+}
+
+func (a *WalletAPI) initChainGateway(cfg *eapi.ChainGatewayConfig) error {
+	if cfg == nil {
+		return merrors.InvalidArgument("chain gateway configuration is not provided")
+	}
+
+	cfg.Address = strings.TrimSpace(cfg.Address)
+	if cfg.Address == "" {
+		cfg.Address = strings.TrimSpace(os.Getenv(cfg.AddressEnv))
+	}
+	if cfg.Address == "" {
+		return merrors.InvalidArgument(fmt.Sprintf("chain gateway address is not specified and address env %s is empty", cfg.AddressEnv))
+	}
+
+	clientCfg := chaingatewayclient.Config{
+		Address:     cfg.Address,
+		DialTimeout: time.Duration(cfg.DialTimeoutSeconds) * time.Second,
+		CallTimeout: time.Duration(cfg.CallTimeoutSeconds) * time.Second,
+		Insecure:    cfg.Insecure,
+	}
+
+	client, err := chaingatewayclient.New(context.Background(), clientCfg)
+	if err != nil {
+		return err
+	}
+
+	a.chainGateway = client
+	return nil
+}