implemented backend wallets/ledger accounts listing

api/ledger/internal/service/ledger/list_accounts.go

@@ -0,0 +1,47 @@
+package ledger
+
+import (
+	"context"
+	"strings"
+
+	"github.com/tech/sendico/pkg/api/routers/gsresponse"
+	"github.com/tech/sendico/pkg/merrors"
+	ledgerv1 "github.com/tech/sendico/pkg/proto/ledger/v1"
+	"go.uber.org/zap"
+)
+
+func (s *Service) listAccountsResponder(_ context.Context, req *ledgerv1.ListAccountsRequest) gsresponse.Responder[ledgerv1.ListAccountsResponse] {
+	return func(ctx context.Context) (*ledgerv1.ListAccountsResponse, error) {
+		if s.storage == nil {
+			return nil, errStorageNotInitialized
+		}
+		if req == nil {
+			return nil, merrors.InvalidArgument("request is required")
+		}
+
+		orgRefStr := strings.TrimSpace(req.GetOrganizationRef())
+		if orgRefStr == "" {
+			return nil, merrors.InvalidArgument("organization_ref is required")
+		}
+		orgRef, err := parseObjectID(orgRefStr)
+		if err != nil {
+			return nil, err
+		}
+
+		// No pagination requested; return all accounts for the organization.
+		accounts, err := s.storage.Accounts().ListByOrganization(ctx, orgRef, 0, 0)
+		if err != nil {
+			s.logger.Warn("failed to list ledger accounts", zap.Error(err), zap.String("organizationRef", orgRef.Hex()))
+			return nil, err
+		}
+
+		resp := &ledgerv1.ListAccountsResponse{
+			Accounts: make([]*ledgerv1.LedgerAccount, 0, len(accounts)),
+		}
+		for _, acc := range accounts {
+			resp.Accounts = append(resp.Accounts, toProtoAccount(acc))
+		}
+
+		return resp, nil
+	}
+}

api/ledger/internal/service/ledger/service.go

@@ -81,6 +81,12 @@ func (s *Service) Register(router routers.GRPC) error {
 	})
 }
 
+// ListAccounts lists ledger accounts for an organization.
+func (s *Service) ListAccounts(ctx context.Context, req *ledgerv1.ListAccountsRequest) (*ledgerv1.ListAccountsResponse, error) {
+	responder := s.listAccountsResponder(ctx, req)
+	return responder(ctx)
+}
+
 // CreateAccount provisions a new ledger account scoped to an organization.
 func (s *Service) CreateAccount(ctx context.Context, req *ledgerv1.CreateAccountRequest) (*ledgerv1.CreateAccountResponse, error) {
 	responder := s.createAccountResponder(ctx, req)