ledger settlement account autocreation

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

@@ -3,8 +3,10 @@ package ledger
 import (
 	"context"
 	"errors"
+	"fmt"
 	"strings"
 
+	"github.com/tech/sendico/ledger/storage"
 	"github.com/tech/sendico/ledger/storage/model"
 	"github.com/tech/sendico/pkg/api/routers/gsresponse"
 	"github.com/tech/sendico/pkg/merrors"
@@ -12,6 +14,7 @@ import (
 	describablev1 "github.com/tech/sendico/pkg/proto/common/describable/v1"
 	ledgerv1 "github.com/tech/sendico/pkg/proto/ledger/v1"
 	"go.uber.org/zap"
+	"go.mongodb.org/mongo-driver/bson/primitive"
 	"google.golang.org/protobuf/types/known/timestamppb"
 )
 
@@ -59,6 +62,12 @@ func (s *Service) createAccountResponder(_ context.Context, req *ledgerv1.Create
 			return nil, err
 		}
 
+		if !req.GetIsSettlement() {
+			if _, err := s.ensureSettlementAccount(ctx, orgRef, currency); err != nil {
+				return nil, err
+			}
+		}
+
 		metadata := req.GetMetadata()
 		if len(metadata) == 0 {
 			metadata = nil
@@ -253,3 +262,73 @@ func describableToProto(desc pmodel.Describable) *describablev1.Describable {
 		Description: description,
 	}
 }
+
+func (s *Service) ensureSettlementAccount(ctx context.Context, orgRef primitive.ObjectID, currency string) (*model.Account, error) {
+	if s.storage == nil || s.storage.Accounts() == nil {
+		return nil, errStorageNotInitialized
+	}
+	normalizedCurrency := strings.ToUpper(strings.TrimSpace(currency))
+	if normalizedCurrency == "" {
+		return nil, merrors.InvalidArgument("currency is required")
+	}
+
+	account, err := s.storage.Accounts().GetDefaultSettlement(ctx, orgRef, normalizedCurrency)
+	if err == nil {
+		return account, nil
+	}
+	if !errors.Is(err, storage.ErrAccountNotFound) {
+		s.logger.Warn("failed to resolve default settlement account",
+			zap.Error(err),
+			zap.String("organizationRef", orgRef.Hex()),
+			zap.String("currency", normalizedCurrency))
+		return nil, merrors.Internal("failed to resolve settlement account")
+	}
+
+	accountCode := defaultSettlementAccountCode(normalizedCurrency)
+	description := "Auto-created default settlement account"
+	account = &model.Account{
+		AccountCode:   accountCode,
+		AccountType:   model.AccountTypeAsset,
+		Currency:      normalizedCurrency,
+		Status:        model.AccountStatusActive,
+		AllowNegative: true,
+		IsSettlement:  true,
+	}
+	account.OrganizationRef = orgRef
+	account.Name = fmt.Sprintf("Settlement %s", normalizedCurrency)
+	account.Description = &description
+
+	if err := s.storage.Accounts().Create(ctx, account); err != nil {
+		if errors.Is(err, merrors.ErrDataConflict) {
+			existing, lookupErr := s.storage.Accounts().GetDefaultSettlement(ctx, orgRef, normalizedCurrency)
+			if lookupErr == nil && existing != nil {
+				return existing, nil
+			}
+			s.logger.Warn("duplicate settlement account create but failed to load existing",
+				zap.Error(lookupErr),
+				zap.String("organizationRef", orgRef.Hex()),
+				zap.String("currency", normalizedCurrency))
+			return nil, merrors.Internal("failed to resolve settlement account after conflict")
+		}
+		s.logger.Warn("failed to create default settlement account",
+			zap.Error(err),
+			zap.String("organizationRef", orgRef.Hex()),
+			zap.String("currency", normalizedCurrency),
+			zap.String("accountCode", accountCode))
+		return nil, merrors.Internal("failed to create settlement account")
+	}
+
+	s.logger.Info("default settlement account created",
+		zap.String("organizationRef", orgRef.Hex()),
+		zap.String("currency", normalizedCurrency),
+		zap.String("accountCode", accountCode))
+	return account, nil
+}
+
+func defaultSettlementAccountCode(currency string) string {
+	cleaned := strings.ToLower(strings.TrimSpace(currency))
+	if cleaned == "" {
+		return "asset:settlement"
+	}
+	return fmt.Sprintf("asset:settlement:%s", cleaned)
+}

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

@@ -16,14 +16,21 @@ import (
 )
 
 type accountStoreStub struct {
-	createErr   error
+	createErr           error
-	created     []*model.Account
+	createErrSettlement error
-	existing    *model.Account
+	created             []*model.Account
-	existingErr error
+	existing            *model.Account
+	existingErr         error
+	defaultSettlement   *model.Account
+	defaultErr          error
 }
 
 func (s *accountStoreStub) Create(_ context.Context, account *model.Account) error {
-	if s.createErr != nil {
+	if account.IsSettlement {
+		if s.createErrSettlement != nil {
+			return s.createErrSettlement
+		}
+	} else if s.createErr != nil {
 		return s.createErr
 	}
 	if account.GetID() == nil || account.GetID().IsZero() {
@@ -47,6 +54,12 @@ func (s *accountStoreStub) Get(context.Context, primitive.ObjectID) (*model.Acco
 }
 
 func (s *accountStoreStub) GetDefaultSettlement(context.Context, primitive.ObjectID, string) (*model.Account, error) {
+	if s.defaultErr != nil {
+		return nil, s.defaultErr
+	}
+	if s.defaultSettlement != nil {
+		return s.defaultSettlement, nil
+	}
 	return nil, storage.ErrAccountNotFound
 }
 
@@ -104,6 +117,47 @@ func TestCreateAccountResponder_Success(t *testing.T) {
 	require.Len(t, accountStore.created, 1)
 }
 
+func TestCreateAccountResponder_AutoCreatesSettlementAccount(t *testing.T) {
+	t.Parallel()
+	orgRef := primitive.NewObjectID()
+
+	accountStore := &accountStoreStub{}
+	svc := &Service{
+		logger:  zap.NewNop(),
+		storage: &repositoryStub{accounts: accountStore},
+	}
+
+	req := &ledgerv1.CreateAccountRequest{
+		OrganizationRef: orgRef.Hex(),
+		AccountCode:     "liability:customer:1",
+		AccountType:     ledgerv1.AccountType_ACCOUNT_TYPE_LIABILITY,
+		Currency:        "usd",
+	}
+
+	resp, err := svc.createAccountResponder(context.Background(), req)(context.Background())
+	require.NoError(t, err)
+	require.NotNil(t, resp)
+	require.NotNil(t, resp.Account)
+	require.Len(t, accountStore.created, 2)
+
+	var settlement *model.Account
+	var created *model.Account
+	for _, acc := range accountStore.created {
+		if acc.IsSettlement {
+			settlement = acc
+		}
+		if acc.AccountCode == "liability:customer:1" {
+			created = acc
+		}
+	}
+	require.NotNil(t, settlement)
+	require.NotNil(t, created)
+	require.Equal(t, defaultSettlementAccountCode("USD"), settlement.AccountCode)
+	require.Equal(t, model.AccountTypeAsset, settlement.AccountType)
+	require.Equal(t, "USD", settlement.Currency)
+	require.True(t, settlement.AllowNegative)
+}
+
 func TestCreateAccountResponder_DuplicateReturnsExisting(t *testing.T) {
 	t.Parallel()