Merge branch 'user-NFT-creation-endpoint-initiate' into 'master'

PDF creation completed - nft endpoint

See merge request !13

ExpressBackend/package-lock.json

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+        },
+        "whatwg-url": {
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+          "requires": {
+            "tr46": "~0.0.3",
+            "webidl-conversions": "^3.0.0"
+          }
+        }
+      }
+    },
     "node-gyp-build": {
       "version": "4.5.0",
       "resolved": "https://registry.npmjs.org/node-gyp-build/-/node-gyp-build-4.5.0.tgz",
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       "optional": true
     },
+    "node-htmlpdf": {
+      "version": "1.0.4",
+      "resolved": "https://registry.npmjs.org/node-htmlpdf/-/node-htmlpdf-1.0.4.tgz",
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+      "requires": {
+        "puppeteer": "^5.2.1"
+      }
+    },
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       "version": "2.0.20",
       "resolved": "https://registry.npmjs.org/nodemon/-/nodemon-2.0.20.tgz",
@@ -4447,22 +5236,79 @@
         "ee-first": "1.1.1"
       }
     },
+    "once": {
+      "version": "1.4.0",
+      "resolved": "https://registry.npmjs.org/once/-/once-1.4.0.tgz",
+      "integrity": "sha512-lNaJgI+2Q5URQBkccEKHTQOPaXdUxnZZElQTZY0MFUAuaEqe1E+Nyvgdz/aIyNi6Z9MzO5dv1H8n58/GELp3+w==",
+      "requires": {
+        "wrappy": "1"
+      }
+    },
+    "p-limit": {
+      "version": "2.3.0",
+      "resolved": "https://registry.npmjs.org/p-limit/-/p-limit-2.3.0.tgz",
+      "integrity": "sha512-//88mFWSJx8lxCzwdAABTJL2MyWB12+eIY7MDL2SqLmAkeKU9qxRvWuSyTjm3FUmpBEMuFfckAIqEaVGUDxb6w==",
+      "requires": {
+        "p-try": "^2.0.0"
+      }
+    },
+    "p-locate": {
+      "version": "4.1.0",
+      "resolved": "https://registry.npmjs.org/p-locate/-/p-locate-4.1.0.tgz",
+      "integrity": "sha512-R79ZZ/0wAxKGu3oYMlz8jy/kbhsNrS7SKZ7PxEHBgJ5+F2mtFW2fK2cOtBh1cHYkQsbzFV7I+EoRKe6Yt0oK7A==",
+      "requires": {
+        "p-limit": "^2.2.0"
+      }
+    },
+    "p-try": {
+      "version": "2.2.0",
+      "resolved": "https://registry.npmjs.org/p-try/-/p-try-2.2.0.tgz",
+      "integrity": "sha512-R4nPAVTAU0B9D35/Gk3uJf/7XYbQcyohSKdvAxIRSNghFl4e71hVoGnBNQz9cWaXxO2I10KTC+3jMdvvoKw6dQ=="
+    },
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       "version": "1.3.3",
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     },
+    "path-exists": {
+      "version": "4.0.0",
+      "resolved": "https://registry.npmjs.org/path-exists/-/path-exists-4.0.0.tgz",
+      "integrity": "sha512-ak9Qy5Q7jYb2Wwcey5Fpvg2KoAc/ZIhLSLOSBmRmygPsGwkVVt0fZa0qrtMz+m6tJTAHfZQ8FnmB4MG4LWy7/w=="
+    },
+    "path-is-absolute": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/path-is-absolute/-/path-is-absolute-1.0.1.tgz",
+      "integrity": "sha512-AVbw3UJ2e9bq64vSaS9Am0fje1Pa8pbGqTTsmXfaIiMpnr5DlDhfJOuLj9Sf95ZPVDAUerDfEk88MPmPe7UCQg=="
+    },
     "path-to-regexp": {
       "version": "0.1.7",
       "resolved": "https://registry.npmjs.org/path-to-regexp/-/path-to-regexp-0.1.7.tgz",
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+    "pend": {
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+      "resolved": "https://registry.npmjs.org/pend/-/pend-1.2.0.tgz",
+      "integrity": "sha512-F3asv42UuXchdzt+xXqfW1OGlVBe+mxa2mqI0pg5yAHZPvFmY3Y6drSf/GQ1A86WgWEN9Kzh/WrgKa6iGcHXLg=="
+    },
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       "version": "2.3.1",
       "resolved": "https://registry.npmjs.org/picomatch/-/picomatch-2.3.1.tgz",
       "integrity": "sha512-JU3teHTNjmE2VCGFzuY8EXzCDVwEqB2a8fsIvwaStHhAWJEeVd1o1QD80CU6+ZdEXXSLbSsuLwJjkCBWqRQUVA==",
       "dev": true
     },
+    "pkg-dir": {
+      "version": "4.2.0",
+      "resolved": "https://registry.npmjs.org/pkg-dir/-/pkg-dir-4.2.0.tgz",
+      "integrity": "sha512-HRDzbaKjC+AOWVXxAU/x54COGeIv9eb+6CkDSQoNTt4XyWoIJvuPsXizxu/Fr23EiekbtZwmh1IcIG/l/a10GQ==",
+      "requires": {
+        "find-up": "^4.0.0"
+      }
+    },
+    "progress": {
+      "version": "2.0.3",
+      "resolved": "https://registry.npmjs.org/progress/-/progress-2.0.3.tgz",
+      "integrity": "sha512-7PiHtLll5LdnKIMw100I+8xJXR5gW2QwWYkT6iJva0bXitZKa/XMrSbdmg3r2Xnaidz9Qumd0VPaMrZlF9V9sA=="
+    },
     "proxy-addr": {
       "version": "2.0.7",
       "resolved": "https://registry.npmjs.org/proxy-addr/-/proxy-addr-2.0.7.tgz",
@@ -4472,17 +5318,65 @@
         "ipaddr.js": "1.9.1"
       }
     },
+    "proxy-from-env": {
+      "version": "1.1.0",
+      "resolved": "https://registry.npmjs.org/proxy-from-env/-/proxy-from-env-1.1.0.tgz",
+      "integrity": "sha512-D+zkORCbA9f1tdWRK0RaCR3GPv50cMxcrz4X8k5LTSUD1Dkw47mKJEZQNunItRTkWwgtaUSo1RVFRIG9ZXiFYg=="
+    },
     "pstree.remy": {
       "version": "1.1.8",
       "resolved": "https://registry.npmjs.org/pstree.remy/-/pstree.remy-1.1.8.tgz",
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       "dev": true
     },
+    "pump": {
+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/pump/-/pump-3.0.0.tgz",
+      "integrity": "sha512-LwZy+p3SFs1Pytd/jYct4wpv49HiYCqd9Rlc5ZVdk0V+8Yzv6jR5Blk3TRmPL1ft69TxP0IMZGJ+WPFU2BFhww==",
+      "requires": {
+        "end-of-stream": "^1.1.0",
+        "once": "^1.3.1"
+      }
+    },
     "punycode": {
       "version": "2.1.1",
       "resolved": "https://registry.npmjs.org/punycode/-/punycode-2.1.1.tgz",
       "integrity": "sha512-XRsRjdf+j5ml+y/6GKHPZbrF/8p2Yga0JPtdqTIY2Xe5ohJPD9saDJJLPvp9+NSBprVvevdXZybnj2cv8OEd0A=="
     },
+    "puppeteer": {
+      "version": "5.5.0",
+      "resolved": "https://registry.npmjs.org/puppeteer/-/puppeteer-5.5.0.tgz",
+      "integrity": "sha512-OM8ZvTXAhfgFA7wBIIGlPQzvyEETzDjeRa4mZRCRHxYL+GNH5WAuYUQdja3rpWZvkX/JKqmuVgbsxDNsDFjMEg==",
+      "requires": {
+        "debug": "^4.1.0",
+        "devtools-protocol": "0.0.818844",
+        "extract-zip": "^2.0.0",
+        "https-proxy-agent": "^4.0.0",
+        "node-fetch": "^2.6.1",
+        "pkg-dir": "^4.2.0",
+        "progress": "^2.0.1",
+        "proxy-from-env": "^1.0.0",
+        "rimraf": "^3.0.2",
+        "tar-fs": "^2.0.0",
+        "unbzip2-stream": "^1.3.3",
+        "ws": "^7.2.3"
+      },
+      "dependencies": {
+        "debug": {
+          "version": "4.3.4",
+          "resolved": "https://registry.npmjs.org/debug/-/debug-4.3.4.tgz",
+          "integrity": "sha512-PRWFHuSU3eDtQJPvnNY7Jcket1j0t5OuOsFzPPzsekD52Zl8qUfFIPEiswXqIvHWGVHOgX+7G/vCNNhehwxfkQ==",
+          "requires": {
+            "ms": "2.1.2"
+          }
+        },
+        "ms": {
+          "version": "2.1.2",
+          "resolved": "https://registry.npmjs.org/ms/-/ms-2.1.2.tgz",
+          "integrity": "sha512-sGkPx+VjMtmA6MX27oA4FBFELFCZZ4S4XqeGOXCv68tT+jb3vk/RyaKWP0PTKyWtmLSM0b+adUTEvbs1PEaH2w=="
+        }
+      }
+    },
     "qs": {
       "version": "6.11.0",
       "resolved": "https://registry.npmjs.org/qs/-/qs-6.11.0.tgz",
@@ -4515,6 +5409,16 @@
         "unpipe": "1.0.0"
       }
     },
+    "readable-stream": {
+      "version": "3.6.0",
+      "resolved": "https://registry.npmjs.org/readable-stream/-/readable-stream-3.6.0.tgz",
+      "integrity": "sha512-BViHy7LKeTz4oNnkcLJ+lVSL6vpiFeX6/d3oSH8zCW7UxP2onchk+vTGB143xuFjHS3deTgkKoXXymXqymiIdA==",
+      "requires": {
+        "inherits": "^2.0.3",
+        "string_decoder": "^1.1.1",
+        "util-deprecate": "^1.0.1"
+      }
+    },
     "readdirp": {
       "version": "3.6.0",
       "resolved": "https://registry.npmjs.org/readdirp/-/readdirp-3.6.0.tgz",
@@ -4524,6 +5428,14 @@
         "picomatch": "^2.2.1"
       }
     },
+    "rimraf": {
+      "version": "3.0.2",
+      "resolved": "https://registry.npmjs.org/rimraf/-/rimraf-3.0.2.tgz",
+      "integrity": "sha512-JZkJMZkAGFFPP2YqXZXPbMlMBgsxzE8ILs4lMIX/2o0L9UBw9O/Y3o6wFw/i9YLapcUJWwqbi3kdxIPdC62TIA==",
+      "requires": {
+        "glob": "^7.1.3"
+      }
+    },
     "safe-buffer": {
       "version": "5.2.1",
       "resolved": "https://registry.npmjs.org/safe-buffer/-/safe-buffer-5.2.1.tgz",
@@ -4708,6 +5620,14 @@
         "utility-types": "^3.7.0"
       },
       "dependencies": {
+        "axios": {
+          "version": "0.25.0",
+          "resolved": "https://registry.npmjs.org/axios/-/axios-0.25.0.tgz",
+          "integrity": "sha512-cD8FOb0tRH3uuEe6+evtAbgJtfxr7ly3fQjYcMcuPlgkwVS9xboaVIpcDV+cYQe+yGykgwZCs1pzjntcGa6l5g==",
+          "requires": {
+            "follow-redirects": "^1.14.7"
+          }
+        },
         "tslib": {
           "version": "1.14.1",
           "resolved": "https://registry.npmjs.org/tslib/-/tslib-1.14.1.tgz",
@@ -4715,6 +5635,14 @@
         }
       }
     },
+    "string_decoder": {
+      "version": "1.3.0",
+      "resolved": "https://registry.npmjs.org/string_decoder/-/string_decoder-1.3.0.tgz",
+      "integrity": "sha512-hkRX8U1WjJFd8LsDJ2yQ/wWWxaopEsABU1XfkM8A+j0+85JAGppt16cr1Whg6KIbb4okU6Mql6BOj+uup/wKeA==",
+      "requires": {
+        "safe-buffer": "~5.2.0"
+      }
+    },
     "strnum": {
       "version": "1.0.5",
       "resolved": "https://registry.npmjs.org/strnum/-/strnum-1.0.5.tgz",
@@ -4730,6 +5658,34 @@
         "has-flag": "^3.0.0"
       }
     },
+    "tar-fs": {
+      "version": "2.1.1",
+      "resolved": "https://registry.npmjs.org/tar-fs/-/tar-fs-2.1.1.tgz",
+      "integrity": "sha512-V0r2Y9scmbDRLCNex/+hYzvp/zyYjvFbHPNgVTKfQvVrb6guiE/fxP+XblDNR011utopbkex2nM4dHNV6GDsng==",
+      "requires": {
+        "chownr": "^1.1.1",
+        "mkdirp-classic": "^0.5.2",
+        "pump": "^3.0.0",
+        "tar-stream": "^2.1.4"
+      }
+    },
+    "tar-stream": {
+      "version": "2.2.0",
+      "resolved": "https://registry.npmjs.org/tar-stream/-/tar-stream-2.2.0.tgz",
+      "integrity": "sha512-ujeqbceABgwMZxEJnk2HDY2DlnUZ+9oEcb1KzTVfYHio0UE6dG71n60d8D2I4qNvleWrrXpmjpt7vZeF1LnMZQ==",
+      "requires": {
+        "bl": "^4.0.3",
+        "end-of-stream": "^1.4.1",
+        "fs-constants": "^1.0.0",
+        "inherits": "^2.0.3",
+        "readable-stream": "^3.1.1"
+      }
+    },
+    "through": {
+      "version": "2.3.8",
+      "resolved": "https://registry.npmjs.org/through/-/through-2.3.8.tgz",
+      "integrity": "sha512-w89qg7PI8wAdvX60bMDP+bFoD5Dvhm9oLheFp5O4a2QF0cSBGsBX4qZmadPMvVqlLJBBci+WqGGOAPvcDeNSVg=="
+    },
     "to-regex-range": {
       "version": "5.0.1",
       "resolved": "https://registry.npmjs.org/to-regex-range/-/to-regex-range-5.0.1.tgz",
@@ -4786,6 +5742,15 @@
         "mime-types": "~2.1.24"
       }
     },
+    "unbzip2-stream": {
+      "version": "1.4.3",
+      "resolved": "https://registry.npmjs.org/unbzip2-stream/-/unbzip2-stream-1.4.3.tgz",
+      "integrity": "sha512-mlExGW4w71ebDJviH16lQLtZS32VKqsSfk80GCfUlwT/4/hNRFsoscrF/c++9xinkMzECL1uL9DDwXqFWkruPg==",
+      "requires": {
+        "buffer": "^5.2.1",
+        "through": "^2.3.8"
+      }
+    },
     "undefsafe": {
       "version": "2.0.5",
       "resolved": "https://registry.npmjs.org/undefsafe/-/undefsafe-2.0.5.tgz",
@@ -4802,6 +5767,11 @@
       "resolved": "https://registry.npmjs.org/urijs/-/urijs-1.19.11.tgz",
       "integrity": "sha512-HXgFDgDommxn5/bIv0cnQZsPhHDA90NPHD6+c/v21U5+Sx5hoP8+dP9IZXBU1gIfvdRfhG8cel9QNPeionfcCQ=="
     },
+    "util-deprecate": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/util-deprecate/-/util-deprecate-1.0.2.tgz",
+      "integrity": "sha512-EPD5q1uXyFxJpCrLnCc1nHnq3gOa6DZBocAIiI2TaSCA7VCJ1UJDMagCzIkXNsUYfD1daK//LTEQ8xiIbrHtcw=="
+    },
     "utility-types": {
       "version": "3.10.0",
       "resolved": "https://registry.npmjs.org/utility-types/-/utility-types-3.10.0.tgz",
@@ -4836,6 +5806,26 @@
         "tr46": "^3.0.0",
         "webidl-conversions": "^7.0.0"
       }
+    },
+    "wrappy": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/wrappy/-/wrappy-1.0.2.tgz",
+      "integrity": "sha512-l4Sp/DRseor9wL6EvV2+TuQn63dMkPjZ/sp9XkghTEbV9KlPS1xUsZ3u7/IQO4wxtcFB4bgpQPRcR3QCvezPcQ=="
+    },
+    "ws": {
+      "version": "7.5.9",
+      "resolved": "https://registry.npmjs.org/ws/-/ws-7.5.9.tgz",
+      "integrity": "sha512-F+P9Jil7UiSKSkppIiD94dN07AwvFixvLIj1Og1Rl9GGMuNipJnV9JzjD6XuqmAeiswGvUmNLjr5cFuXwNS77Q==",
+      "requires": {}
+    },
+    "yauzl": {
+      "version": "2.10.0",
+      "resolved": "https://registry.npmjs.org/yauzl/-/yauzl-2.10.0.tgz",
+      "integrity": "sha512-p4a9I6X6nu6IhoGmBqAcbJy1mlC4j27vEPZX9F4L4/vZT3Lyq1VkFHw/V/PUcB9Buo+DG3iHkT0x3Qya58zc3g==",
+      "requires": {
+        "buffer-crc32": "~0.2.3",
+        "fd-slicer": "~1.1.0"
+      }
     }
   }
 }

ExpressBackend/package.json

@@ -14,10 +14,12 @@
   "author": "22_23-J 16",
   "license": "ISC",
   "dependencies": {
+    "axios": "^1.2.2",
     "cors": "^2.8.5",
     "crypto-js": "^4.1.1",
     "express": "^4.18.2",
     "mongoose": "^6.8.0",
+    "node-htmlpdf": "^1.0.4",
     "stellar-sdk": "^10.4.1"
   },
   "devDependencies": {

ExpressBackend/route/patient-routes/mental-state-router.js

@@ -70,6 +70,7 @@ router.post("/", async (req, res) => {
       //send the transaction to blockchain
       try {
         const transactionResult = await server.submitTransaction(transaction);
+        server.transactions;
         console.log(
           "Mental state transaction sent to blockchain : HASH : " +
             transactionResult.hash

ExpressBackend/route/patient-routes/nft-route.js

+const express = require("express");
+const router = express.Router();
+const DecryptWithServerKey = require("./../../services/decryptionservice");
+const Patient = require("./../../model/patient/patient");
+const axios = require("axios");
+const StellarSDK = require("stellar-sdk");
+const htmlpdf = require("node-htmlpdf");
+let currentHash;
+let genesisHash;
+let isGenesisPassed;
+let htmlString;
+
+router.post("/", async (req, res) => {
+  //Get the payload and decrypt
+  const decryptedPatientKey = req.body.patientkey;
+  const decryptedPatientSeed = req.body.patientseed;
+  const decryptedPractitionerKey = req.body.practitioner;
+
+  //get the current hash from DB
+  try {
+    let patientDetails = await Patient.findOne({
+      publickey: decryptedPatientKey,
+    });
+
+    if (patientDetails == null) {
+      console.log("No patient details found for : " + decryptedPatientKey);
+      console.log("/patient/createnft - NFT creation and sharing failed");
+      return res
+        .status(404)
+        .json({ message: "Patient not found for : " + decryptedPatientKey });
+    } else {
+      //take the current hash and thegenesis hash recorded
+      let initialCurrentHash = patientDetails.currenthash;
+      genesisHash = patientDetails.genesishash;
+
+      //check if this is the genesis hash
+      if (genesisHash === initialCurrentHash) {
+        //send response with the error message
+        console.log(
+          "This user does not have enough information to create an EHR"
+        );
+        console.log("/patient/createnft - NFT creation and sharing failed");
+        return res.status(404).json({
+          message:
+            "This user does not have enough information to create an EHR",
+        });
+      } else {
+        htmlString = `<!DOCTYPE html> 
+        <html lang="en">
+          <head>
+            <meta charset="UTF-8" />
+            <meta http-equiv="X-UA-Compatible" content="IE=edge" />
+            <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+          </head>
+          <body>
+            <center>
+                <h1>Electronic Health Record</h1>
+                <h2>User Details</h1>    
+            </center>
+            <p style="float: inline-start; font-weight: 300; font-size: smaller;">*Please note that this is a computer generated health record</p>`;
+        let timestamp = new Date().toString();
+        let timestampString =
+          `<p style="float: inline-start; font-weight: 300; font-size: smaller;">Generated time : ` +
+          timestamp +
+          `</p><hr />`;
+        htmlString = htmlString + timestampString;
+        //get the genesis block details
+        try {
+          console.log(
+            "Calling the genesis block: " +
+              process.env.STELLARTESTNET +
+              "/transactions/" +
+              genesisHash.toString()
+          );
+          const genesisTransactionDetails = await axios.default.get(
+            process.env.STELLARTESTNET +
+              "/transactions/" +
+              genesisHash.toString()
+          );
+
+          if (genesisTransactionDetails.status != 200) {
+            console.log(
+              "Error when getting genesis transaction : Code - " +
+                genesisTransactionDetails.status +
+                " Status : " +
+                genesisTransactionDetails.statusText
+            );
+            console.log("/patient/createnft - NFT creation and sharing failed");
+            return res.status(500).json({
+              message:
+                "Error when getting genesis transaction : Code - " +
+                genesisTransactionDetails.status +
+                " Status : " +
+                genesisTransactionDetails.statusText,
+            });
+          } else {
+            const genesisOperations = JSON.stringify(
+              StellarSDK.xdr.TransactionEnvelope.fromXDR(
+                genesisTransactionDetails.data.envelope_xdr,
+                "base64"
+              )
+                .v1()
+                .tx()
+                .operations()
+            );
+
+            const genesisJsonOb = JSON.parse(genesisOperations);
+
+            //loop the operations
+            for (let i = 0; i < genesisJsonOb.length; i++) {
+              let name = Buffer.from(
+                genesisJsonOb[i]._attributes.body._value._attributes.dataName
+                  .data
+              );
+              let value = Buffer.from(
+                genesisJsonOb[i]._attributes.body._value._attributes.dataValue
+                  .data
+              );
+
+              //append genesis details to the HTML string
+              htmlString =
+                htmlString +
+                `<p>` +
+                name.toString() +
+                ` : ` +
+                value.toString() +
+                `</p>`;
+            }
+          }
+        } catch (errorWhenCallingGenesisTxn) {
+          console.log(
+            "Error when getting genesis transaction details from stellar : " +
+              errorWhenCallingGenesisTxn
+          );
+          console.log("/patient/createnft - NFT creation and sharing failed");
+          return res.status(500).json({
+            message:
+              "Error when getting genesis transaction details from stellar : " +
+              errorWhenCallingGenesisTxn,
+          });
+        }
+
+        currentHash = initialCurrentHash;
+        htmlString =
+          htmlString +
+          `<hr> 
+        <br>
+        <h3>Recorded mental health statuses and emotional statuses according to previous chat bot interaction</h3>
+        <br>`;
+        //loop through all the previous transactions
+        do {
+          //get the details by calling the endpoints get transaction details
+          try {
+            console.log(
+              "Calling : " +
+                process.env.STELLARTESTNET +
+                "/transactions/" +
+                currentHash.toString()
+            );
+            //call the stellar endpoint
+            const transactionDetails = await axios.default.get(
+              process.env.STELLARTESTNET +
+                "/transactions/" +
+                currentHash.toString()
+            );
+            //check the status of the transaction
+            if (transactionDetails.status != 200) {
+              console.log(
+                "Error when getting transaction : Code - " +
+                  transactionDetails.status +
+                  " Status : " +
+                  transactionDetails.statusText
+              );
+              console.log(
+                "/patient/createnft - NFT creation and sharing failed"
+              );
+              return res.status(500).json({
+                message:
+                  "Error when getting transaction : Code - " +
+                  transactionDetails.status +
+                  " Status : " +
+                  transactionDetails.statusText,
+              });
+            } else {
+              const operations = JSON.stringify(
+                StellarSDK.xdr.TransactionEnvelope.fromXDR(
+                  transactionDetails.data.envelope_xdr,
+                  "base64"
+                )
+                  .v1()
+                  .tx()
+                  .operations()
+              );
+
+              const jsonOb = JSON.parse(operations);
+
+              //loop the operations
+              for (let i = 0; i < jsonOb.length; i++) {
+                let name = Buffer.from(
+                  jsonOb[i]._attributes.body._value._attributes.dataName.data
+                );
+                let value = Buffer.from(
+                  jsonOb[i]._attributes.body._value._attributes.dataValue.data
+                );
+
+                //check the name type
+                if (name.toString() === "Timestamp") {
+                  //append to HTML string
+                  htmlString =
+                    htmlString +
+                    `<p>Date and time : ` +
+                    value.toString() +
+                    `</p>`;
+                } else if (
+                  name.toString() === "Emotion" ||
+                  name.toString() === "Mental state"
+                ) {
+                  //append to HTML string
+                  htmlString =
+                    htmlString +
+                    `<p>` +
+                    name.toString() +
+                    ` : ` +
+                    value.toString() +
+                    `</p>`;
+                }
+              }
+              htmlString = htmlString + `<br><br>`;
+              //Assign the current hash
+              currentHash = Buffer.from(
+                jsonOb[0]._attributes.body._value._attributes.dataValue.data
+              ).toString();
+
+              //skipping the genesis hash
+              if (currentHash === genesisHash) {
+                isGenesisPassed = true;
+              } else {
+                isGenesisPassed = false;
+              }
+            }
+          } catch (errorWhenGettingTxnFromStellar) {
+            console.log(
+              "Error when getting transaction details from stellar : " +
+                errorWhenGettingTxnFromStellar
+            );
+            console.log("/patient/createnft - NFT creation and sharing failed");
+
+            return res.status(500).json({
+              message:
+                "Error when getting transaction details from stellar : " +
+                errorWhenGettingTxnFromStellar,
+            });
+          }
+        } while (!isGenesisPassed);
+        console.log("All the patient data taken from the blockchain");
+        htmlString = htmlString + `</body></html>`;
+        console.log("HTML code for EHR generated");
+
+        //create the PDF document for EHR
+        let path = `./patientehr/` + decryptedPatientKey + `-EHR.pdf`;
+        let pdfOptions = {
+          path: path,
+          format: "A4",
+        };
+        htmlpdf
+          .create(htmlString, pdfOptions)
+          .then((buff) => {
+            console.log("PDF created");
+          })
+          .catch((errorWhenGeneratingPDF) => {
+            console.log(
+              "Error when generating PDF : " + errorWhenGeneratingPDF
+            );
+            console.log("/patient/createnft - NFT creation and sharing failed");
+            return res.status(500).json({
+              message: "Error when generating PDF : " + errorWhenGeneratingPDF,
+            });
+          });
+      }
+    }
+  } catch (errorWhenGettingCurrentHash) {
+    console.log(
+      "Error when getting user details from DB: " + errorWhenGettingCurrentHash
+    );
+    console.log("/patient/createnft - NFT creation and sharing failed");
+    return res.status(500).json({
+      message:
+        "Error when getting user details from DB: " +
+        errorWhenGettingCurrentHash,
+    });
+  }
+});
+
+module.exports = router;

ExpressBackend/server.js

@@ -29,6 +29,9 @@ app.use("/patient/mentalstate", patientMentalState);
 const patientRequest = require("./route/patient-routes/patient-requests");
 app.use("/patient/request", patientRequest);
 
+const patientNft = require("./route/patient-routes/nft-route");
+app.use("/patient/createnft", patientNft);
+
 //practitioner routes
 const practitionerRegister = require("./route/practitioner-routes/registration-route");
 app.use("/practitioner/register", practitionerRegister);