Get merkle proof when generating certificate

src/common/Api/LeCoffreApi/sdk/FileService.ts

@@ -1,8 +1,8 @@
-
 import { v4 as uuidv4 } from 'uuid';
 
 import MessageBus from 'src/sdk/MessageBus';
 import User from 'src/sdk/User';
+import { FileData } from '../../../../front/Api/Entities/types';
 
 export default class FileService {
 
@@ -10,7 +10,7 @@ export default class FileService {
 
   private constructor() { }
 
-  public static createFile(fileData: any, validatorId: string): Promise<any> {
+  public static createFile(fileData: FileData, validatorId: string): Promise<any> {
     const ownerId = User.getInstance().getPairingId()!;
 
     const processData: any = {
@@ -82,7 +82,7 @@ export default class FileService {
     return this.messageBus.getFileByUid(uid);
   }
 
-  public static updateFile(process: any, newData: any): Promise<void> {
+  public static updateFile(process: any, newData: Partial<FileData> & { isDeleted?: string }): Promise<void> {
     return new Promise<void>((resolve: () => void, reject: (error: string) => void) => {
       this.messageBus.updateProcess(process.processId, { updated_at: new Date().toISOString(), ...newData }, [], null).then((processUpdated: any) => {
         const newStateId: string = processUpdated.diffs[0]?.state_id;

src/front/Api/Entities/index.ts

@@ -0,0 +1,2 @@
+export * from './types';
+export * from './rule'; 

src/front/Api/Entities/types.ts

@@ -0,0 +1,21 @@
+/**
+ * FileBlob interface representing a file's binary data and metadata
+ * Used for file transmission and storage in the application
+ */
+export interface FileBlob {
+  /** MIME type of the file (e.g., "application/pdf", "image/jpeg") */
+  type: string;
+  /** Binary data of the file as Uint8Array */
+  data: Uint8Array;
+}
+
+/**
+ * FileData interface representing a complete file object with blob and metadata
+ * Used when creating or updating files in the system
+ */
+export interface FileData {
+  /** The file blob containing type and binary data */
+  file_blob: FileBlob;
+  /** The name of the file */
+  file_name: string;
+} 

src/front/Components/DesignSystem/DragAndDrop/index.tsx

@@ -213,9 +213,9 @@ export default function DragAndDrop(props: IProps) {
 			</div>
 			{documentFiles.length > 0 && (
 				<div className={classes["documents"]}>
-					{documentFiles.map((documentFile) => (
+					{documentFiles.map((documentFile, index) => (
 						<DocumentFileElement
-							key={documentFile.id}
+							key={documentFile.uid || `${documentFile.id}-${index}`}
 							isLoading={documentFile.isLoading}
 							file={documentFile.file}
 							onRemove={() => handleRemove(documentFile)}

src/front/Components/Layouts/ClientDashboard/DepositDocumentComponent/index.tsx

@@ -9,6 +9,7 @@ import Confirm from "@Front/Components/DesignSystem/OldModal/Confirm";
 
 import FileService from "src/common/Api/LeCoffreApi/sdk/FileService";
 import DocumentService from "src/common/Api/LeCoffreApi/sdk/DocumentService";
+import { FileBlob, FileData } from "@Front/Api/Entities/types";
 
 type IProps = {
 	document: any;
@@ -39,12 +40,12 @@ export default function DepositDocumentComponent(props: IProps) {
 							const arrayBuffer = event.target.result as ArrayBuffer;
 							const uint8Array = new Uint8Array(arrayBuffer);
 
-							const fileBlob: any = {
+							const fileBlob: FileBlob = {
 								type: file.type,
 								data: uint8Array
 							};
 
-							const fileData: any = {
+							const fileData: FileData = {
 								file_blob: fileBlob,
 								file_name: file.name
 							};
@@ -82,9 +83,9 @@ export default function DepositDocumentComponent(props: IProps) {
 		(fileUid: string) => {
 			return new Promise<void>(
 				(resolve: () => void) => {
-					FileService.getFileByUid(fileUid).then((process: any) => {
+					FileService.getFileByUid(fileUid).then((res: any) => {
-						if (process) {
+						if (res) {
-							FileService.updateFile(process, { isDeleted: 'true' }).then(() => {
+							FileService.updateFile(res.processId, { isDeleted: 'true' }).then(() => {
 								DocumentService.getDocumentByUid(document.uid!).then((process: any) => {
 									if (process) {
 										const document: any = process.processData;

src/front/Components/Layouts/ClientDashboard/ViewDocumentsNotary/index.tsx

@@ -7,6 +7,7 @@ import { DocumentNotary } from "le-coffre-resources/dist/Notary";
 import Image from "next/image";
 import { NextRouter, useRouter } from "next/router";
 import React from "react";
+import { FileBlob } from "@Front/Api/Entities/types";
 
 import BasePage from "../../Base";
 import classes from "./classes.module.scss";
@@ -25,7 +26,7 @@ type IState = {
 	isValidateModalVisible: boolean;
 	refuseText: string;
 	selectedFileIndex: number;
-	selectedFile: any;
+	selectedFile: { uid: string; file_name: string; file_blob: FileBlob } | null;
 	documentNotary: DocumentNotary | null;
 	fileBlob: Blob | null;
 	isLoading: boolean;
@@ -132,7 +133,7 @@ class ViewDocumentsNotaryClass extends BasePage<IPropsClass, IState> {
 				{
 					documentNotary,
 					selectedFileIndex: 0,
-					selectedFile: documentNotary.files![0]!,
+					selectedFile: documentNotary.files![0] as any,
 					isLoading: false,
 				},
 				() => {

src/front/Components/Layouts/Folder/AskDocuments/index.tsx

@@ -17,6 +17,7 @@ import backgroundImage from "@Assets/images/background_refonte.svg";
 
 import FolderService from "src/common/Api/LeCoffreApi/sdk/FolderService";
 import DocumentService from "src/common/Api/LeCoffreApi/sdk/DocumentService";
+import { DocumentData } from "../FolderInformation/ClientView/DocumentTables/types";
 
 export default function AskDocuments() {
 	const router = useRouter();
@@ -61,17 +62,21 @@ export default function AskDocuments() {
 				const documentAsked: [] = values["document_types"] as [];
 
 				for (let i = 0; i < documentAsked.length; i++) {
+					const documentTypeUid = documentAsked[i];
+					if (!documentTypeUid) continue;
+					
 					const documentData: any = {
 						folder: {
-							uid: folderUid,
+							uid: folderUid as string,
 						},
 						depositor: {
-							uid: customerUid,
+							uid: customerUid as string,
 						},
 						document_type: {
-							uid: documentAsked[i]
+							uid: documentTypeUid
 						},
-						document_status: EDocumentStatus.ASKED
+						document_status: EDocumentStatus.ASKED,
+						file_uid: null,
 					};
 					const validatorId: string = '884cb36a346a79af8697559f16940141f068bdf1656f88fa0df0e9ecd7311fb8:0';
 

src/front/Components/Layouts/Folder/FolderInformation/ClientView/DocumentTables/FilePreviewModal/index.tsx

@@ -1,8 +1,12 @@
 import Modal from "@Front/Components/DesignSystem/Modal";
 import React from "react";
+import { FileBlob } from "@Front/Api/Entities/types";
 
 type IProps = {
-	file: any;
+	file: {
+		uid: string;
+		file_blob: FileBlob;
+	};
 	url: string;
 	isOpen: boolean;
 	onClose?: () => void;

src/front/Components/Layouts/Folder/FolderInformation/ClientView/DocumentTables/index.tsx

@@ -8,7 +8,7 @@ import Tag, { ETagColor, ETagVariant } from "@Front/Components/DesignSystem/Tag"
 import Typography, { ETypo, ETypoColor } from "@Front/Components/DesignSystem/Typography";
 import Module from "@Front/Config/Module";
 import useOpenable from "@Front/Hooks/useOpenable";
-import { ArrowDownTrayIcon, EyeIcon, TrashIcon } from "@heroicons/react/24/outline";
+import { ArrowDownTrayIcon, EyeIcon, TrashIcon, DocumentTextIcon } from "@heroicons/react/24/outline";
 import { useMediaQuery } from "@mui/material";
 import { Document } from "le-coffre-resources/dist/Customer";
 import { EDocumentStatus } from "le-coffre-resources/dist/Customer/Document";
@@ -24,6 +24,9 @@ import DeleteSentDocumentModal from "./DeleteSentDocumentModal";
 import DocumentService from "src/common/Api/LeCoffreApi/sdk/DocumentService";
 import DocumentTypeService from "src/common/Api/LeCoffreApi/sdk/DocumentTypeService";
 import FileService from "src/common/Api/LeCoffreApi/sdk/FileService";
+import FolderService from "src/common/Api/LeCoffreApi/sdk/FolderService";
+import PdfService, { CertificateData, Metadata } from "@Front/Services/PdfService";
+import MessageBus from "src/sdk/MessageBus";
 
 type IProps = {
 	customerUid: string;
@@ -64,6 +67,12 @@ export default function DocumentTables(props: IProps) {
 					// FilterBy folder.uid & depositor.uid
 					documents = documents.filter((document: any) => document.folder.uid === folderUid && document.depositor.uid === customerUid);
 
+					console.log('[DocumentTables] fetchDocuments: all documents for this folder/customer:', documents.map(doc => ({
+						uid: doc.uid,
+						status: doc.document_status,
+						type: doc.document_type?.name
+					})));
+
 					for (const document of documents) {
 						document.document_type = (await DocumentTypeService.getDocumentTypeByUid(document.document_type.uid)).processData;
 
@@ -154,6 +163,77 @@ export default function DocumentTables(props: IProps) {
 			.catch((e) => console.warn(e));
 	}, []);
 
+	const onDownloadCertificate = useCallback(async (doc: any) => {
+		try {
+			console.log('[DocumentTables] onDownloadCertificate: doc', doc);
+			const certificateData: CertificateData = {
+				customer: {
+					firstName: doc.depositor.first_name || doc.depositor.firstName || "N/A",
+					lastName: doc.depositor.last_name || doc.depositor.lastName || "N/A",
+					postalAddress: doc.depositor.postal_address || doc.depositor.address || doc.depositor.postalAddress || "N/A",
+					email: doc.depositor.email || "N/A"
+				},
+				notary: {
+					name: "N/A"
+				},
+				folderUid: folderUid,
+				documentHash: "N/A",
+				metadata: {
+					fileName: "N/A",
+					isDeleted: false,
+					updatedAt: new Date(),
+					commitmentId: "N/A",
+					createdAt: new Date(),
+					documentUid: "N/A",
+					documentType: "N/A",
+					merkleProof: "N/A"
+				}
+			};
+
+			// Fetch folder data to get office/notary information
+			// const folderProcess = await FolderService.getFolderByUid(folderUid, false, true);
+			// const folderData = folderProcess?.processData;
+
+			// console.log('[DocumentTables] onDownloadCertificate: folderData', folderData);
+
+			const documentProcesses = await DocumentService.getDocuments();
+			documentProcesses.filter((process: any) => process.processData.folder.uid === folderUid);
+
+			// console.log('[DocumentTables] onDownloadCertificate: documentProcesses', documentProcesses);
+
+			for (const document of documentProcesses) {
+				for (const file of document.processData.files) {
+					await FileService.getFileByUid(file.uid).then((res: any) => {
+						console.log('[DocumentTables] onDownloadCertificate: fileProcess', res);
+						const hash = res.lastUpdatedFileState.pcd_commitment.file_blob;
+						certificateData.documentHash = hash;
+
+						MessageBus.getInstance().generateMerkleProof(res.lastUpdatedFileState, 'file_blob').then((proof) => {
+							console.log('[DocumentTables] onDownloadCertificate: proof', proof);
+							const metadata: Metadata = {
+								fileName: res.processData.file_name,
+								isDeleted: false,
+								updatedAt: new Date(res.processData.updated_at),
+								commitmentId: res.lastUpdatedFileState.commited_in,
+								createdAt: new Date(res.processData.created_at),
+								documentUid: doc.document_type.uid,
+								documentType: doc.document_type.name,
+								merkleProof: proof
+							};
+							certificateData.metadata = metadata;
+						});
+					}
+				)}
+			}
+				
+			console.log('[DocumentTables] onDownloadCertificate: certificateData', certificateData);
+
+			await PdfService.getInstance().downloadCertificate(certificateData);
+		} catch (error) {
+			console.error('Error downloading certificate:', error);
+		}
+	}, [folderUid, customerUid]);
+
 	const askedDocuments: IRowProps[] = useMemo(
 		() =>
 			documents
@@ -233,8 +313,8 @@ export default function DocumentTables(props: IProps) {
 	);
 
 	const validatedDocuments: IRowProps[] = useMemo(
-		() =>
+		() => {
-			documents
+			const validated = documents
 				.map((document) => {
 					if (document.document_status !== EDocumentStatus.VALIDATED) return null;
 					return {
@@ -266,13 +346,17 @@ export default function DocumentTables(props: IProps) {
 										<IconButton icon={<EyeIcon />} />
 									</Link>
 									<IconButton onClick={() => onDownload(document)} icon={<ArrowDownTrayIcon />} />
+									<IconButton onClick={() => onDownloadCertificate(document)} icon={<DocumentTextIcon />} />
 								</div>
 							),
 						},
 					};
 				})
-				.filter((document) => document !== null) as IRowProps[],
+				.filter((document) => document !== null) as IRowProps[];
-		[documents, folderUid, onDownload],
+			
+			return validated;
+		},
+		[documents, folderUid, onDownload, onDownloadCertificate],
 	);
 
 	const refusedDocuments: IRowProps[] = useMemo(

src/front/Components/Layouts/Folder/ViewDocuments/index.tsx

@@ -19,6 +19,7 @@ import MessageBox from "@Front/Components/Elements/MessageBox";
 
 import DocumentService from "src/common/Api/LeCoffreApi/sdk/DocumentService";
 import FileService from "src/common/Api/LeCoffreApi/sdk/FileService";
+import { FileBlob } from "@Front/Api/Entities/types";
 
 type IProps = {};
 type IPropsClass = {
@@ -32,7 +33,7 @@ type IState = {
 	isValidateModalVisible: boolean;
 	refuseText: string;
 	selectedFileIndex: number;
-	selectedFile: any; // File | null; TODO: review
+	selectedFile: { uid: string; file_name: string; file_blob: FileBlob } | null;
 	validatedPercentage: number;
 	document: Document | null;
 	fileBlob: Blob | null;
@@ -237,6 +238,8 @@ class ViewDocumentsClass extends BasePage<IPropsClass, IState> {
 
 	private async getFilePreview(): Promise<void> {
 		try {
+			if (!this.state.selectedFile) return;
+			
 			const fileBlob: Blob = new Blob([this.state.selectedFile.file_blob.data], { type: this.state.selectedFile.file_blob.type });
 			this.setState({
 				fileBlob,
@@ -247,7 +250,7 @@ class ViewDocumentsClass extends BasePage<IPropsClass, IState> {
 	}
 
 	private downloadFile() {
-		if (!this.state.fileBlob) return;
+		if (!this.state.fileBlob || !this.state.selectedFile) return;
 
 		const url = URL.createObjectURL(this.state.fileBlob);
 		const a = document.createElement('a');

src/front/Services/PdfService/index.ts

@@ -0,0 +1,312 @@
+import { saveAs } from 'file-saver';
+import jsPDF from 'jspdf';
+
+export interface CustomerInfo {
+	firstName: string;
+	lastName: string;
+	postalAddress: string;
+	email: string;
+}
+
+export interface NotaryInfo {
+	name: string;
+	// Add more notary fields as needed
+}
+
+export interface Metadata {
+	fileName: string,
+	createdAt: Date,
+	isDeleted: boolean,
+	updatedAt: Date,	
+	commitmentId: string,
+	documentUid: string;
+	documentType: string;
+	merkleProof: string;
+}
+
+export interface CertificateData {
+	customer: CustomerInfo;
+	notary: NotaryInfo;
+	folderUid: string;
+	documentHash: string;
+	metadata: Metadata;
+}
+
+export default class PdfService {
+	private static instance: PdfService;
+
+	public static getInstance(): PdfService {
+		if (!PdfService.instance) {
+			PdfService.instance = new PdfService();
+		}
+		return PdfService.instance;
+	}
+
+	/**
+	 * Generate a certificate PDF for a document
+	 * @param certificateData - Data needed for the certificate
+	 * @returns Promise<Blob> - The generated PDF as a blob
+	 */
+	public async generateCertificate(certificateData: CertificateData): Promise<Blob> {
+		try {
+			const doc = new jsPDF();
+			
+			// Notary Information Section (Top Left)
+			doc.setFontSize(12);
+			doc.setFont('helvetica', 'bold');
+			doc.text('Notaire Validateur:', 20, 30);
+			doc.setFont('helvetica', 'normal');
+			doc.text(certificateData.notary.name, 20, 37);
+			
+			// Customer Information Section (Top Right)
+			doc.setFont('helvetica', 'bold');
+			doc.text('Fournisseur de Document:', 120, 30);
+			doc.setFont('helvetica', 'normal');
+			doc.text(`${certificateData.customer.firstName} ${certificateData.customer.lastName}`, 120, 37);
+			doc.text(certificateData.customer.email, 120, 44);
+			doc.text(certificateData.customer.postalAddress, 120, 51);
+			
+			// Centered Title
+			doc.setFontSize(20);
+			doc.setFont('helvetica', 'bold');
+			doc.text('Certificat de Validation de Document', 105, 80, { align: 'center' });
+			
+			// Add a line separator
+			doc.setLineWidth(0.5);
+			doc.line(20, 90, 190, 90);
+			
+			// Reset font for content
+			doc.setFontSize(12);
+			doc.setFont('helvetica', 'normal');
+			
+			let yPosition = 110;
+			
+			// Document Information Section
+			doc.setFont('helvetica', 'bold');
+			doc.text('Informations du Document', 20, yPosition);
+			yPosition += 10;
+			
+			doc.setFont('helvetica', 'normal');
+			doc.text(`UID du Document: ${certificateData.metadata.documentUid}`, 20, yPosition);
+			yPosition += 7;
+			doc.text(`Type de Document: ${certificateData.metadata.documentType}`, 20, yPosition);
+			yPosition += 7;
+			doc.text(`UID du Dossier: ${certificateData.folderUid}`, 20, yPosition);
+			yPosition += 7;
+			doc.text(`Créé le: ${certificateData.metadata.createdAt.toLocaleDateString('fr-FR')}`, 20, yPosition);
+			yPosition += 7;
+			doc.text(`Nom du fichier: ${certificateData.metadata.fileName}`, 20, yPosition);
+			yPosition += 7;
+			doc.text(`ID de transaction: ${certificateData.metadata.commitmentId}`, 20, yPosition);
+			yPosition += 7;
+			doc.text(`Dernière modification: ${certificateData.metadata.updatedAt.toLocaleDateString('fr-FR')}`, 20, yPosition);
+			yPosition += 7;
+			doc.text(`Statut: ${certificateData.metadata.isDeleted ? 'Supprimé' : 'Actif'}`, 20, yPosition);
+			yPosition += 15;
+			
+			// Document Hash Section
+			doc.setFont('helvetica', 'bold');
+			doc.text('Intégrité du Document', 20, yPosition);
+			yPosition += 10;
+			
+			doc.setFont('helvetica', 'normal');
+			doc.text(`Hash SHA256 du Document:`, 20, yPosition);
+			yPosition += 7;
+			
+			// Split hash into multiple lines if needed
+			const hash = certificateData.documentHash;
+			const maxWidth = 170; // Available width for text
+			const hashLines = this.splitTextToFit(doc, hash, maxWidth);
+			
+			for (const line of hashLines) {
+				doc.text(line, 25, yPosition);
+				yPosition += 7;
+			}
+			yPosition += 8; // Extra space after hash
+			
+			// Footer
+			const pageCount = doc.getNumberOfPages();
+			for (let i = 1; i <= pageCount; i++) {
+				doc.setPage(i);
+				doc.setFontSize(10);
+				doc.setFont('helvetica', 'italic');
+				doc.text(`Page ${i} sur ${pageCount}`, 105, 280, { align: 'center' });
+				doc.text(`Généré le ${new Date().toLocaleString('fr-FR')}`, 105, 285, { align: 'center' });
+			}
+			
+			return doc.output('blob');
+		} catch (error) {
+			console.error('Error generating certificate:', error);
+			throw new Error('Failed to generate certificate');
+		}
+	}
+
+	/**
+	 * Split text to fit within a specified width
+	 * @param doc - jsPDF document instance
+	 * @param text - Text to split
+	 * @param maxWidth - Maximum width in points
+	 * @returns Array of text lines
+	 */
+	private splitTextToFit(doc: jsPDF, text: string, maxWidth: number): string[] {
+		const lines: string[] = [];
+		let currentLine = '';
+		
+		// Split by words first
+		const words = text.split('');
+		
+		for (const char of words) {
+			const testLine = currentLine + char;
+			const testWidth = doc.getTextWidth(testLine);
+			
+			if (testWidth <= maxWidth) {
+				currentLine = testLine;
+			} else {
+				if (currentLine) {
+					lines.push(currentLine);
+					currentLine = char;
+				} else {
+					// If even a single character is too wide, force a break
+					lines.push(char);
+				}
+			}
+		}
+		
+		if (currentLine) {
+			lines.push(currentLine);
+		}
+		
+		return lines;
+	}
+
+	/**
+	 * Download a certificate PDF
+	 * @param certificateData - Data needed for the certificate
+	 * @param filename - Optional filename for the download
+	 */
+	public async downloadCertificate(certificateData: CertificateData, filename?: string): Promise<void> {
+		try {
+			const pdfBlob = await this.generateCertificate(certificateData);
+			const defaultFilename = `certificate_${certificateData.metadata.documentUid}_${new Date().toISOString().split('T')[0]}.pdf`;
+			saveAs(pdfBlob, filename || defaultFilename);
+		} catch (error) {
+			console.error('Error downloading certificate:', error);
+			throw error;
+		}
+	}
+
+	/**
+	 * Generate certificate for notary documents
+	 * @param certificateData - Data needed for the certificate
+	 * @returns Promise<Blob> - The generated PDF as a blob
+	 */
+	public async generateNotaryCertificate(certificateData: CertificateData): Promise<Blob> {
+		try {
+			const doc = new jsPDF();
+			
+			// Notary Information Section (Top Left)
+			doc.setFontSize(12);
+			doc.setFont('helvetica', 'bold');
+			doc.text('Notaire Validateur:', 20, 30);
+			doc.setFont('helvetica', 'normal');
+			doc.text(certificateData.notary.name, 20, 37);
+			
+			// Customer Information Section (Top Right)
+			doc.setFont('helvetica', 'bold');
+			doc.text('Fournisseur de Document:', 120, 30);
+			doc.setFont('helvetica', 'normal');
+			doc.text(`${certificateData.customer.firstName} ${certificateData.customer.lastName}`, 120, 37);
+			doc.text(certificateData.customer.email, 120, 44);
+			doc.text(certificateData.customer.postalAddress, 120, 51);
+			
+			// Centered Title
+			doc.setFontSize(20);
+			doc.setFont('helvetica', 'bold');
+			doc.text('Certificat Notarial de Validation de Document', 105, 80, { align: 'center' });
+			
+			// Add a line separator
+			doc.setLineWidth(0.5);
+			doc.line(20, 90, 190, 90);
+			
+			// Reset font for content
+			doc.setFontSize(12);
+			doc.setFont('helvetica', 'normal');
+			
+			let yPosition = 110;
+			
+			// Document Information Section
+			doc.setFont('helvetica', 'bold');
+			doc.text('Informations du Document', 20, yPosition);
+			yPosition += 10;
+			
+			doc.setFont('helvetica', 'normal');
+			doc.text(`Identifiant du Document: ${certificateData.metadata.documentUid}`, 20, yPosition);
+			yPosition += 7;
+			doc.text(`Type de Document: ${certificateData.metadata.documentType}`, 20, yPosition);
+			yPosition += 7;
+			doc.text(`Numéro de dossier: ${certificateData.folderUid}`, 20, yPosition);
+			yPosition += 7;
+			doc.text(`Créé le: ${certificateData.metadata.createdAt.toLocaleDateString('fr-FR')}`, 20, yPosition);
+			yPosition += 7;
+			doc.text(`Nom du fichier: ${certificateData.metadata.fileName}`, 20, yPosition);
+			yPosition += 7;
+			doc.text(`ID de transaction: ${certificateData.metadata.commitmentId}`, 20, yPosition);
+			yPosition += 7;
+			doc.text(`Dernière modification: ${certificateData.metadata.updatedAt.toLocaleDateString('fr-FR')}`, 20, yPosition);
+			yPosition += 7;
+			doc.text(`Statut: ${certificateData.metadata.isDeleted ? 'Supprimé' : 'Actif'}`, 20, yPosition);
+			yPosition += 15;
+			
+			// Document Hash Section
+			doc.setFont('helvetica', 'bold');
+			doc.text('Intégrité du Document', 20, yPosition);
+			yPosition += 10;
+			
+			doc.setFont('helvetica', 'normal');
+			doc.text(`Hash SHA256 du Document:`, 20, yPosition);
+			yPosition += 7;
+			
+			// Split hash into multiple lines if needed
+			const hash = certificateData.documentHash;
+			const maxWidth = 170; // Available width for text
+			const hashLines = this.splitTextToFit(doc, hash, maxWidth);
+			
+			for (const line of hashLines) {
+				doc.text(line, 25, yPosition);
+				yPosition += 7;
+			}
+			yPosition += 8; // Extra space after hash
+			
+			// Footer
+			const pageCount = doc.getNumberOfPages();
+			for (let i = 1; i <= pageCount; i++) {
+				doc.setPage(i);
+				doc.setFontSize(10);
+				doc.setFont('helvetica', 'italic');
+				doc.text(`Page ${i} sur ${pageCount}`, 105, 280, { align: 'center' });
+				doc.text(`Certificat Notarial - Généré le ${new Date().toLocaleString('fr-FR')}`, 105, 285, { align: 'center' });
+			}
+			
+			return doc.output('blob');
+		} catch (error) {
+			console.error('Error generating notary certificate:', error);
+			throw new Error('Failed to generate notary certificate');
+		}
+	}
+
+	/**
+	 * Download a notary certificate PDF
+	 * @param certificateData - Data needed for the certificate
+	 * @param filename - Optional filename for the download
+	 */
+	public async downloadNotaryCertificate(certificateData: CertificateData, filename?: string): Promise<void> {
+		try {
+			const pdfBlob = await this.generateNotaryCertificate(certificateData);
+			const defaultFilename = `notary_certificate_${certificateData.metadata.documentUid}_${new Date().toISOString().split('T')[0]}.pdf`;
+			saveAs(pdfBlob, filename || defaultFilename);
+		} catch (error) {
+			console.error('Error downloading notary certificate:', error);
+			throw error;
+		}
+	}
+} 

src/sdk/MessageBus.ts

@@ -6,6 +6,7 @@ import EventBus from './EventBus';
 import User from './User';
 
 import MapUtils from './MapUtils';
+import { FileBlob } from '../front/Api/Entities/types';
 
 export default class MessageBus {
   private static instance: MessageBus;
@@ -113,61 +114,71 @@ export default class MessageBus {
 
           const publicDataDecoded: { [key: string]: any } = {};
 
-          for (let stateId = 0; stateId < process.states.length - 1; stateId++) {
+          // We only care about the public data as they are in the last commited state
-            const state = process.states[stateId];
+          const processTip = process.states[process.states.length - 1].commited_in;
-            if (!state) {
+          const lastCommitedState = process.states.findLast((state: any) => state.commited_in !== processTip);
-              continue;
-            }
 
-            const publicDataEncoded = state.public_data;
+          if (!lastCommitedState) {
-            if (!publicDataEncoded) {
+            continue;
-              continue;
+          }
-            }
 
-            for (const key of Object.keys(publicDataEncoded)) {
+          const publicDataEncoded = lastCommitedState.public_data;
-              publicDataDecoded[key] = await this.getPublicData(publicDataEncoded[key]);
+          if (!publicDataEncoded) {
-            }
+            continue;
+          }
+
+          for (const key of Object.keys(publicDataEncoded)) {
+            publicDataDecoded[key] = await this.getPublicData(publicDataEncoded[key]);
           }
 
           if (!(publicDataDecoded['uid'] && publicDataDecoded['uid'] === uid && publicDataDecoded['utype'] && publicDataDecoded['utype'] === 'file')) {
             continue;
           }
 
+          // We take the file in it's latest commited state
           let file: any;
 
-          for (let stateId = 0; stateId < process.states.length - 1; stateId++) {
+          // Which is the last state that updated file_blob?
-            const lastState = process.states[stateId];
+          const lastUpdatedFileState = process.states.findLast((state: any) => state.pcd_commitment['file_blob']);
-            if (!lastState) {
+
+          if (!lastUpdatedFileState) {
+            continue;
+          }
+
+          try {
+            const processData = await this.getData(processId, lastUpdatedFileState.state_id);
+            const isEmpty = Object.keys(processData).length === 0;
+            if (isEmpty) {
               continue;
             }
 
-            const lastStateId = lastState.state_id;
+            const publicDataEncoded = lastUpdatedFileState.public_data;
-            if (!lastStateId) {
+            if (!publicDataEncoded) {
               continue;
             }
-
+            const publicDataDecoded: { [key: string]: any } = {};
-            try {
+            for (const key of Object.keys(publicDataEncoded)) {
-              const processData = await this.getData(processId, lastStateId);
+              publicDataDecoded[key] = await this.getPublicData(publicDataEncoded[key]);
-              const isEmpty = Object.keys(processData).length === 0;
-              if (isEmpty) {
-                continue;
-              }
-
-              if (!file) {
-                file = {
-                  processId,
-                  lastStateId,
-                  processData,
-                };
-              } else {
-                for (const key of Object.keys(processData)) {
-                  file.processData[key] = processData[key];
-                }
-                file.lastStateId = lastStateId;
-              }
-            } catch (error) {
-              console.error(error);
             }
+
+            if (!file) {
+              file = {
+                processId,
+                lastUpdatedFileState,
+                processData,
+                publicDataDecoded,
+              };
+            } else {
+              for (const key of Object.keys(processData)) {
+                file.processData[key] = processData[key];
+              }
+              file.lastUpdatedFileState = lastUpdatedFileState;
+              for (const key of Object.keys(publicDataDecoded)) {
+                file.publicDataDecoded[key] = publicDataDecoded[key];
+              }
+            }
+          } catch (error) {
+            console.error(error);
           }
 
           files.push(file);
@@ -557,6 +568,84 @@ export default class MessageBus {
     });
   }
 
+  /**
+   * Hash a document file using SHA-256
+   * @param fileBlob - The file blob to hash
+   * @returns Promise<string> - The SHA-256 hash of the file
+   */
+  public hashDocument(fileBlob: FileBlob, commitedIn: string): Promise<string> {
+    return new Promise<string>((resolve: (hash: string) => void, reject: (error: string) => void) => {
+      this.checkToken().then(() => {
+        const messageId = `HASH_VALUE_${uuidv4()}`;
+
+        const unsubscribe = EventBus.getInstance().on('VALUE_HASHED', (responseId: string, hash: string) => {
+          if (responseId !== messageId) {
+            return;
+          }
+          unsubscribe();
+          resolve(hash);
+        });
+
+        const unsubscribeError = EventBus.getInstance().on('ERROR_VALUE_HASHED', (responseId: string, error: string) => {
+          if (responseId !== messageId) {
+            return;
+          }
+          unsubscribeError();
+          reject(error);
+        });
+
+        const user = User.getInstance();
+        const accessToken = user.getAccessToken()!;
+
+        const label = 'file_blob';
+
+        this.sendMessage({
+          type: 'HASH_VALUE',
+          accessToken,
+          commitedIn,
+          label,
+          fileBlob,
+          messageId
+        });
+      }).catch(reject);
+    });
+  }
+
+  public generateMerkleProof(processState: any, attributeName: string): Promise<any> {
+    return new Promise<any>((resolve: (proof: any) => void, reject: (error: string) => void) => {
+      this.checkToken().then(() => {
+        const messageId = `GET_MERKLE_PROOF_${uuidv4()}`;
+
+        const unsubscribe = EventBus.getInstance().on('MERKLE_PROOF_RETRIEVED', (responseId: string, proof: any) => {
+          if (responseId !== messageId) {
+            return;
+          }
+          unsubscribe();
+          resolve(proof);
+        });
+
+        const unsubscribeError = EventBus.getInstance().on('ERROR_MERKLE_PROOF_RETRIEVED', (responseId: string, error: string) => {
+          if (responseId !== messageId) {
+            return;
+          }
+          unsubscribeError();
+          reject(error);
+        });
+
+        const user = User.getInstance();
+        const accessToken = user.getAccessToken()!;
+
+        this.sendMessage({
+          type: 'GET_MERKLE_PROOF',
+          accessToken,
+          processState,
+          attributeName,
+          messageId
+        });
+      }).catch(reject);
+    });
+  }
+
   private validateToken(): Promise<boolean> {
     return new Promise<boolean>((resolve: (isValid: boolean) => void, reject: (error: string) => void) => {
       const messageId = `VALIDATE_TOKEN_${uuidv4()}`;
@@ -647,7 +736,7 @@ export default class MessageBus {
       console.error('[MessageBus] sendMessage: iframe not found');
       return;
     }
-    console.log('[MessageBus] sendMessage:', message);
+    // console.log('[MessageBus] sendMessage:', message);
     iframe.contentWindow?.postMessage(message, targetOrigin);
   }
 
@@ -684,7 +773,7 @@ export default class MessageBus {
     }
 
     const message = event.data;
-    console.log('[MessageBus] handleMessage:', message);
+    // console.log('[MessageBus] handleMessage:', message);
 
     switch (message.type) {
       case 'LISTENING':
@@ -746,6 +835,14 @@ export default class MessageBus {
         this.doHandleMessage(message.messageId, 'STATE_VALIDATED', message, (message: any) => message.validatedProcess);
         break;
 
+      case 'VALUE_HASHED': // HASH_VALUE
+        this.doHandleMessage(message.messageId, 'VALUE_HASHED', message, (message: any) => message.hash);
+        break;
+
+      case 'MERKLE_PROOF_RETRIEVED': // GENERATE_MERKLE_PROOF
+        this.doHandleMessage(message.messageId, 'MERKLE_PROOF_RETRIEVED', message, (message: any) => message.proof);
+        break;
+
       case 'ERROR':
         console.error('Error:', message);
         this.errors[message.messageId] = message.error;