fix(exports): stabilize published types and compatibility with updated dependencies

ts/skr.invoice.adapter.ts

@@ -18,11 +18,25 @@ import type {
  */
 export class InvoiceAdapter {
   private logger: plugins.smartlog.ConsoleLog;
+  private readonly einvoiceModuleName = '@fin.cx/einvoice';
   
   constructor() {
     this.logger = new plugins.smartlog.ConsoleLog();
   }
 
+  private async getEInvoiceClass(): Promise<{
+    new (): any;
+    fromXml(xmlString: string): Promise<any>;
+  }> {
+    const { EInvoice } = (await import(this.einvoiceModuleName)) as {
+      EInvoice: {
+        new (): any;
+        fromXml(xmlString: string): Promise<any>;
+      };
+    };
+    return EInvoice;
+  }
+
   private readonly MAX_XML_SIZE = 10 * 1024 * 1024; // 10MB max
   private readonly MAX_PDF_SIZE = 50 * 1024 * 1024; // 50MB max
   
@@ -44,13 +58,14 @@ export class InvoiceAdapter {
       }
       
       // Parse the invoice using @fin.cx/einvoice
-      let einvoice;
+      const EInvoice = await this.getEInvoiceClass();
+      let einvoice: any;
       if (typeof file === 'string') {
-        einvoice = await plugins.einvoice.EInvoice.fromXml(file);
+        einvoice = await EInvoice.fromXml(file);
       } else {
         // Convert buffer to string first
         const xmlString = file.toString('utf-8');
-        einvoice = await plugins.einvoice.EInvoice.fromXml(xmlString);
+        einvoice = await EInvoice.fromXml(xmlString);
       }
       
       // Get detected format
@@ -74,7 +89,7 @@ export class InvoiceAdapter {
       invoice.xmlContent = einvoice.getXml();
       
       // Calculate content hash
-      invoice.contentHash = await this.calculateContentHash(invoice.xmlContent);
+      invoice.contentHash = await this.calculateContentHash(invoice.xmlContent!);
       
       // Classify tax scenario
       invoice.taxScenario = this.classifyTaxScenario(invoice);
@@ -82,7 +97,8 @@ export class InvoiceAdapter {
       return invoice;
     } catch (error) {
       this.logger.log('error', `Failed to parse invoice: ${error}`);
-      throw new Error(`Invoice parsing failed: ${error.message}`);
+      const errorMessage = error instanceof Error ? error.message : String(error);
+      throw new Error(`Invoice parsing failed: ${errorMessage}`);
     }
   }
 
@@ -310,7 +326,7 @@ export class InvoiceAdapter {
    * Get exemption reason for VAT category
    */
   private getExemptionReason(categoryCode: string): string | undefined {
-    const exemptionReasons: Record<string, string> = {
+    const exemptionReasons: Record<string, string | undefined> = {
       'E': 'Tax exempt',
       'Z': 'Zero rated',
       'AE': 'Reverse charge (§13b UStG)',
@@ -516,7 +532,8 @@ export class InvoiceAdapter {
   ): Promise<string> {
     try {
       // Load from existing XML
-      const einvoice = await plugins.einvoice.EInvoice.fromXml(invoice.xmlContent!);
+      const EInvoice = await this.getEInvoiceClass();
+      const einvoice: any = await EInvoice.fromXml(invoice.xmlContent!);
       
       // Convert to target format (takes ~0.6ms)
       const convertedXml = await einvoice.exportXml(targetFormat as any);
@@ -524,7 +541,8 @@ export class InvoiceAdapter {
       return convertedXml;
     } catch (error) {
       this.logger.log('error', `Failed to convert invoice format: ${error}`);
-      throw new Error(`Format conversion failed: ${error.message}`);
+      const errorMessage = error instanceof Error ? error.message : String(error);
+      throw new Error(`Format conversion failed: ${errorMessage}`);
     }
   }
 
@@ -537,7 +555,8 @@ export class InvoiceAdapter {
   ): Promise<{ xml: string; pdf?: Buffer }> {
     try {
       // Create a new invoice instance
-      const einvoice = new plugins.einvoice.EInvoice();
+      const EInvoice = await this.getEInvoiceClass();
+      const einvoice: any = new EInvoice();
       
       // Set invoice data
       const businessTerms = this.mapToBusinessTerms(invoiceData);
@@ -558,7 +577,8 @@ export class InvoiceAdapter {
       return { xml, pdf };
     } catch (error) {
       this.logger.log('error', `Failed to generate invoice: ${error}`);
-      throw new Error(`Invoice generation failed: ${error.message}`);
+      const errorMessage = error instanceof Error ? error.message : String(error);
+      throw new Error(`Invoice generation failed: ${errorMessage}`);
     }
   }
 
@@ -578,4 +598,4 @@ export class InvoiceAdapter {
       // This would be a comprehensive mapping in production
     };
   }
-}
+}