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+# Blockchain for the Internet of Vehicle 
+    <br/>
+
+
+##
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diff --git a/src/README.md b/src/README.md
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+# Blockchain for the Internet of Vehicle 
+    <br/>
+
+
+### Generation of Keypair for a user
+
+```
+ /**
+ * Generate a keypair based on the supplied seed string.
+ * @param {string} keySeed - The seed that should be used to generate the keypair.
+ * @returns {*} The generated keypair.
+ */
+ generateKeypair(keySeed) {
+ if (typeof keySeed == "undefined" || keySeed == "") return new driver.Ed25519Keypair();
+ return new driver.Ed25519Keypair(bip39.mnemonicToSeed(keySeed).slice(0, 32));
+ }
+```
+
+### Creation of different Assets and App
+
+```
+/**
+ * Creation of various users and devices as assets on the blockchain and establishes a parent-child relationship
+ */
+createAPPdetails(){
+
+ document.getElementById('update').value = "NameSpace set to : " + nameSpace
+
+ // create admin user type - this is the asset representing the group of admins
+ const adminGroupAsset = {
+ ns: `${nameSpace}.admin`,
+ name: 'admin'
+ }
+ const adminGroupMetadata = {
+ can_link: [this.vaahanam.appadmin.publicKey]
+ }
+
+
+ const adminGroupId = (this.createNewAsset(this.vaahanam.appadmin, adminGroupAsset, adminGroupMetadata)).id
+ console.log('AdminGroup: ' + adminGroupId)
+
+ // create admin user instance - this is a single user with admin role represented by an asset
+ const adminUserMetadata = {
+ event: 'User Assigned',
+ date: new Date(),
+ timestamp: Date.now(),
+ publicKey: this.vaahanam.appadmin.publicKey,
+ eventData: {
+ userType: 'admin'
+ }
+ }
+
+ // create app - the umbrella asset for representing the app
+ const appAsset = {
+ ns: nameSpace,
+ name: nameSpace
+ }
+
+ const appMetadata = {
+ can_link: adminGroupId
+ }
+
+ const appId = (this.createNewAsset(this.vaahanam.appadmin, appAsset, appMetadata)).id
+ console.log('App: ' + appId)
+
+ const adminUserId = (this.createUser(this.vaahanam.appadmin, adminGroupId, 'admin', this.vaahanam.appadminPublicKey, adminUserMetadata)).id
+ console.log('AdminUser1: ' + adminUserId)
+
+ //Create types
+ const rtoId = (this.createType('rto', appId, adminGroupId)).id
+ console.log('RTO : ' + rtoId)
+
+ const vspId = (this.createType('vehicleserviceprovider', appId, adminGroupId)).id
+ console.log('Vehicle Service Provider : ' + vspId)
+
+ const iotId = (this.createType('iotdevice', appId, adminGroupId)).id
+ console.log('IOT Device : ' + iotId)
+
+ const userId = (this.createType('user', appId, rtoId)).id
+ console.log('User (Vehicle Owners) : ' + userId)
+
+ const vehicleId = (this.createType('vehicle', appId, rtoId)).id
+ console.log('Vehicle : ' + vehicleId)
+
+ const userMetadata = {
+ event: 'User Assigned',
+ date: new Date(),
+ timestamp: Date.now(),
+ publicKey: this.vaahanam.appadminPublicKey,
+ eventData: {
+ userType: 'RTO of Mettupalayam'
+ }
+ }
+
+ const rtoassetId_mtp = (this.createUser(this.vaahanam.appadmin, rtoId, 'rto' , this.vaahanam.raPublicKey, userMetadata)).id
+ console.log('RTO of Mettupalayam : ' + rtoassetId_mtp)
+
+ const user2Metadata = {
+ event: 'User Assigned',
+ date: new Date(),
+ timestamp: Date.now(),
+ publicKey: this.vaahanam.appadminPublicKey,
+ eventData: {
+ userType: 'RTO of Chennai South'
+ }
+ }
+
+ // user 2 added to tribe 2
+ const rtoassetId_maa = (this.createUser(this.vaahanam.appadmin, rtoId, 'rto', this.vaahanam.ra1PublicKey, user2Metadata)).id
+ console.log('RTO of Chennai South : ' + rtoassetId_maa)
+
+
+ },
+
+ createTypeInstance(keypair, asset, metadata) {
+
+
+ return this.createNewAsset(keypair, asset, metadata)
+ },
+ createUser(adminKeyPair, userTypeId, userTypeName, userPublicKey, userMetadata) {
+ const asset = {
+ ns: `${nameSpace}.${userTypeName}`,
+ link: userTypeId,
+ createdBy: adminKeyPair.publicKey,
+ type: userTypeName,
+ keyword: 'UserAsset'
+ }
+
+ const metadata = {
+ event: 'User Added',
+ date: new Date(),
+ timestamp: Date.now(),
+ publicKey: userPublicKey,
+ eventData: {
+ userType: userTypeName
+ }
+ }
+
+ const instanceTx = this.createNewAsset(adminKeyPair, asset, metadata)
+ this.transferAsset(instanceTx, adminKeyPair, userPublicKey, userMetadata)
+ return instanceTx
+ },
+ createType(typeName, appId, canLinkAssetId) {
+ const asset = {
+ ns: `${nameSpace}.${typeName}`,
+ link: appId,
+ name: typeName
+ }
+
+ const metadata = {
+ can_link: canLinkAssetId
+ }
+
+ return this.createNewAsset(this.vaahanam.appadmin, asset, metadata)
+ },
+ createNewAsset(keypair, asset, metadata) {
+ console.log('Creating new asset : ',asset)
+
+ //document.getElementById('update').value += '\nCreating new asset : ' + asset
+
+ const API_PATH = 'https://test.bigchaindb.com/api/v1/'
+ let conn = new BigchainDB.Connection(API_PATH)
+
+ let condition = BigchainDB.Transaction.makeEd25519Condition(keypair.publicKey, true)
+
+ let output = BigchainDB.Transaction.makeOutput(condition)
+ output.public_keys = [keypair.publicKey]
+
+ const transaction = BigchainDB.Transaction.makeCreateTransaction(
+ asset,
+ metadata,
+ [ BigchainDB.Transaction.makeOutput(
+ BigchainDB.Transaction.makeEd25519Condition(keypair.publicKey))
+ ],
+ keypair.publicKey
+ )
+
+ const txSigned = BigchainDB.Transaction.signTransaction(transaction, keypair.privateKey)
+
+ console.log('New Asset Creation with Transaction Signed ',txSigned)
+
+ conn.postTransactionCommit(txSigned)
+
+ return txSigned
+ },
+
+ transferAsset(tx, fromKeyPair, toPublicKey, metadata) {
+
+ const API_PATH = 'https://test.bigchaindb.com/api/v1/'
+ let conn = new BigchainDB.Connection(API_PATH)
+
+ let condition = BigchainDB.Transaction.makeEd25519Condition(toPublicKey)
+
+ let output = BigchainDB.Transaction.makeOutput(condition)
+ output.public_keys = [toPublicKey]
+
+ const txTransfer = BigchainDB.Transaction.makeTransferTransaction(
+ [{tx: tx,output_index:0}],
+ [output],
+ metadata
+ )
+
+ const txSigned = BigchainDB.Transaction.signTransaction(txTransfer, fromKeyPair.privateKey)
+ return conn.postTransactionCommit(txSigned)
+ }
+ ```
+
+### Crytptotoken Creation
+
+```
+/**
+ * Creates Naanayam Tokens for the Vaahan-namchain
+ * @param {int} nTokens - Number of tokens to be created [Value is defined as 44 Million].
+ * @returns {*} The transaction ID.
+ */
+createTokens(nTokens) {
+ console.log('Request to create Tokens '+nTokens)
+
+ const API_PATH = 'https://test.bigchaindb.com/api/v1/'
+
+ console.log('Public key of Token Creator : ', this.tokenCreatorP)
+
+ let conn = new BigchainDB.Connection(API_PATH)
+
+ // Construct a transaction payload
+ const tx = BigchainDB.Transaction.makeCreateTransaction({
+ token: 'Naanayam',
+ link: '2a89589da371d3593d7e1a9fed0c888c794a546f933c6a30aaed2adc5f6511dc',
+ number_tokens: nTokens
+ },
+ // Metadata field, contains information about the transaction itself
+ // (can be `null` if not needed)
+ {
+ can_link: '688f4fec05cf6d01624b3a33a7a2206479be8c5a1a1ef50131418b5b6de91d04',
+ datetime: new Date().toString()
+ },
+ // Output: Divisible asset, include nTokens as parameter
+ [BigchainDB.Transaction.makeOutput(BigchainDB.Transaction.makeEd25519Condition(this.tokenCreatorP), nTokens.toString())],
+ this.tokenCreatorP
+ )
+
+ console.log(tx)
+
+ // Sign the transaction with the private key of the token creator
+ const txSigned = BigchainDB.Transaction
+ .signTransaction(tx, this.tokenCreatorpr)
+
+ console.log(txSigned)
+
+ // Send the transaction off to BigchainDB
+ conn.postTransactionCommit(txSigned)
+ .then(res => {
+ //document.getElementById("transid").innerHTML = txSigned.id
+ const elem = document.getElementById('transid')
+ elem.href = API_PATH + 'transactions/' + txSigned.id
+ elem.innerHTML = txSigned.id
+ })
+
+ return txSigned.id;
+ }
+```
+
+### Transfer of tokens
+
+```
+ /**
+ * Transfer tokens between two users
+ * @param {int} amountToSend - number of tokens to be transferred
+ * @param {string} receiveraddr - public address of the receiver
+ * @returns {*} The transaction ID.
+ */
+ transfer(amountToSend, receiveraddr) {
+
+ const API_PATH = 'https://test.bigchaindb.com/api/v1/'
+
+ let conn = new BigchainDB.Connection(API_PATH)
+
+ conn.getTransaction(UserPublickey, false)
+ .then((txOutputs) => {
+ console.log(txOutputs)
+
+ let tokens = parseInt(txOutputs['outputs'][0]['amount'])
+
+ console.log('Remaining Tokens',tokens)
+
+ // Create transfer transaction
+ const transferTrans = BigchainDB.Transaction.makeTransferTransaction(
+ [{
+ tx: txOutputs,
+ output_index: 0
+ }],
+ // Transaction output: Two outputs, because the whole input
+ // must be spent
+ [BigchainDB.Transaction.makeOutput(BigchainDB.Transaction.makeEd25519Condition('AbLkgEyeUL2xC2QmnEs21cqHjGJuPcPMXA562996QnCw'),(tokens - amountToSend).toString()),
+ BigchainDB.Transaction.makeOutput(BigchainDB.Transaction.makeEd25519Condition('5dzYagqoqjqr9dWa44XYUpTcfvRrH6tFT9Bw4EvTiHC4'),amountToSend.toString())
+ ],
+ // Metadata (optional)
+ {
+ transfered_to: '5dzYagqoqjqr9dWa44XYUpTcfvRrH6tFT9Bw4EvTiHC4',
+ amountreceived: amountToSend
+ }
+ )
+
+ // Sign the transaction with the tokenCreator key
+ const signedTransfer = BigchainDB.Transaction.signTransaction(transferTrans, Userprivatekey)
+
+ return conn.postTransactionCommit(signedTransfer)
+ })
+ .then((tx) =>{
+ console.log('Response from BDB server:', tx)
+ console.log('Is Ramaguru the owner?', tx['outputs'][1]['public_keys'][0] == '5dzYagqoqjqr9dWa44XYUpTcfvRrH6tFT9Bw4EvTiHC4')
+ const elem = document.getElementById('lastTransaction')
+ elem.href = API_PATH + 'transactions/' + tx.id
+ elem.innerText = txSigned.id
+ console.log('Transaction ID : ', tx.id, ' is accepted') })
+
+ return tx.id
+ }
+```
+
+### User and Vehicle Registration
+
+```
+/**
+ * Registers the vehicle, the vehicle owner and creates a relationship between these two assets
+ * @param {string} pub - public key of the vehicle owner
+ * @param {string} aadhar - aadhar number of the vehicle owner
+ * @param {string} engno - Engine number of the vehicle
+ * @param {string} chasisno - Chasis number of the vehicle
+ * @param {string} vmodel - Vehicle Model
+ * @param {string} vservice - Vehicle Service Provider
+ * @param {string} vtype - Vehicle Type
+ * @param {string} regno - Registration Number
+ */
+registervehicle1(pub,rto,aadhar,engno,chasisno,vmodel,vservice,vtype,regno){
+
+ typeName = 'vehicle'
+ typeId = '66b8a260073a94a2bb9b3e6a419e0f36b6967dcaa492640a8893652af6c713aa'
+
+ const asset = {
+ ns: `${nameSpace}.${typeName}`,
+ link: typeId,
+ Regional_Transport_Office : rto,
+ Engine_number: engno,
+ Chasis_number: chasisno,
+ Vehicle_model: vmodel,
+ Vehicle_type: vtype,
+ Vehicle_service: vservice,
+ Registration_number: regno,
+ Time_of_Registration: new Date().toString(),
+ }
+
+ const userMetadata = {
+ event: 'User Assigned',
+ date: new Date(),
+ timestamp: Date.now(),
+ publicKey: this.vaahanam.raPublicKey,
+ eventData: {
+ userType: aadhar
+ }
+ }
+
+ const userid = (this.createUser(this.vaahanam.ra, '6bfa6e454a81f6fbc189fe7edc4e79102c791e128fd2fc643d82a18cde4425be', 'user' , pub, userMetadata)).id
+ const tx = (this.createTypeInstance(this.vaahanam.ra, asset, { event: 'Vehicle Created', owner: userid })).id;
+
+ console.log(tx)
+ document.getElementById('transid').value = tx;
+ }
+```
+
+### Retrieve Vehicle Information through Transaction ID
+
+```
+/**
+ * Querying blockchain to get the vehicle details based on transaction ID
+ * @param {string} tid - Transaction ID
+ */
+getvehicleTID(tid){
+ const API_PATH = 'https://test.bigchaindb.com/api/v1/'
+ let conn = new BigchainDB.Connection(API_PATH)
+
+ conn.getTransaction(tid)
+ .then((res) => {
+ console.log('Found Transaction with TID ', tid, ' and content ', res);
+ console.log(res['asset']['data']['Regional_Transport_Office']);
+ console.log(res['asset']['data']['Engine_number']);
+ console.log(res['asset']['data']['Chasis_number']);
+ console.log(res['asset']['data']['Vehicle_model']);
+ console.log(res['asset']['data']['Vehicle_type']);
+ console.log(res['asset']['data']['Vehicle_service']);
+ console.log(res['asset']['data']['Time_of_Registration']);
+ document.getElementById("rtodet").innerHTML = res['asset']['data']['Regional_Transport_Office'];
+ document.getElementById("engnodet").innerHTML = res['asset']['data']['Engine_number'];
+ document.getElementById("cnodet").innerHTML = res['asset']['data']['Chasis_number'];
+ document.getElementById("vmoddet").innerHTML = res['asset']['data']['Vehicle_model'];
+ document.getElementById("vtypedet").innerHTML = res['asset']['data']['Vehicle_type'];
+ document.getElementById("vssdet").innerHTML = res['asset']['data']['Vehicle_service'];
+ document.getElementById("timedet").innerHTML = res['asset']['data']['Time_of_Registration'];
+ })
+ }
+```
+
+### Sending DTC transaction to the blockchain
+
+```
+/**
+ * Invoked by smartcontract to send the critical DTC and corresponding log hash to blockchain
+ * @param {string} assetid - Vehicle assetid
+ * @param {string} ipfshash - IPFS hash of the log file stored
+ * @param {string} smartcontract - IPFS hash of the smartcontract that invoked this
+ * @param {string} dtc - Diagnostic trouble code set in the vehicle
+ */
+senddtc(assetid, ipfshash, smartcontract, dtc){
+ //Invoked by Smart Contracts
+ console.log('invoked smart contract for assetid ', assetid, 'ipfshash ', ipfshash,' with dtc set to ', dtc)
+
+ const API_PATH = 'https://test.bigchaindb.com/api/v1/'
+ let conn = new BigchainDB.Connection(API_PATH)
+
+ conn.getTransaction(assetid)
+ .then((res) => {
+ console.log(res);
+ assetidofuser = res['metadata']['owner'];
+ console.log(assetidofuser);
+
+ conn.getTransaction(assetidofuser)
+ .then((txuser) => {
+
+ pub = txuser['metadata']['publicKey'];
+
+ console.log('Public key of Token Creator : ', pub)
+
+ // Construct a transaction payload
+ const tx = BigchainDB.Transaction.makeCreateTransaction({
+ vehicle: assetid,
+ dtc : dtc
+ log_hash: ipfshash,
+ smartcontract_hash: smartcontract
+ },
+ // Metadata field, contains information about the transaction itself
+ // (can be `null` if not needed)
+ {
+ datetime: new Date().toString()
+ },
+ // Output: Divisible asset, include nTokens as parameter
+ [BigchainDB.Transaction.makeOutput(BigchainDB.Transaction.makeEd25519Condition(pub))],
+ pub
+ )
+
+ console.log(tx)
+
+ // Sign the transaction with the private key of the token creator
+ const txSigned = BigchainDB.Transaction.signTransaction(tx, pub)
+
+ console.log(txSigned)
+
+ conn.postTransactionCommit(txSigned)
+
+ console.log(txSigned.id)
+ })
+ })
+ }
+```
+
diff --git a/src/vaahanamchain.js b/src/vaahanamchain.js
new file mode 100644
index 0000000000000000000000000000000000000000..2ab552f2e63669cdfc934117bcd193ab5651548b
--- /dev/null
+++ b/src/vaahanamchain.js
@@ -0,0 +1,431 @@
+ /**
+ * Generate a keypair based on the supplied seed string.
+ * @param {string} keySeed - The seed that should be used to generate the keypair.
+ * @returns {*} The generated keypair.
+ */
+ generateKeypair(keySeed) {
+ if (typeof keySeed == "undefined" || keySeed == "") return new driver.Ed25519Keypair();
+ return new driver.Ed25519Keypair(bip39.mnemonicToSeed(keySeed).slice(0, 32));
+ }
+
+ /**
+ * Creation of various users and devices as assets on the blockchain and establishes a parent-child relationship
+ */
+createAPPdetails(){
+
+ document.getElementById('update').value = "NameSpace set to : " + nameSpace
+
+ // create admin user type - this is the asset representing the group of admins
+ const adminGroupAsset = {
+ ns: `${nameSpace}.admin`,
+ name: 'admin'
+ }
+ const adminGroupMetadata = {
+ can_link: [this.vaahanam.appadmin.publicKey]
+ }
+
+
+ const adminGroupId = (this.createNewAsset(this.vaahanam.appadmin, adminGroupAsset, adminGroupMetadata)).id
+ console.log('AdminGroup: ' + adminGroupId)
+
+ // create admin user instance - this is a single user with admin role represented by an asset
+ const adminUserMetadata = {
+ event: 'User Assigned',
+ date: new Date(),
+ timestamp: Date.now(),
+ publicKey: this.vaahanam.appadmin.publicKey,
+ eventData: {
+ userType: 'admin'
+ }
+ }
+
+ // create app - the umbrella asset for representing the app
+ const appAsset = {
+ ns: nameSpace,
+ name: nameSpace
+ }
+
+ const appMetadata = {
+ can_link: adminGroupId
+ }
+
+ const appId = (this.createNewAsset(this.vaahanam.appadmin, appAsset, appMetadata)).id
+ console.log('App: ' + appId)
+
+ const adminUserId = (this.createUser(this.vaahanam.appadmin, adminGroupId, 'admin', this.vaahanam.appadminPublicKey, adminUserMetadata)).id
+ console.log('AdminUser1: ' + adminUserId)
+
+ //Create types
+ const rtoId = (this.createType('rto', appId, adminGroupId)).id
+ console.log('RTO : ' + rtoId)
+
+ const vspId = (this.createType('vehicleserviceprovider', appId, adminGroupId)).id
+ console.log('Vehicle Service Provider : ' + vspId)
+
+ const iotId = (this.createType('iotdevice', appId, adminGroupId)).id
+ console.log('IOT Device : ' + iotId)
+
+ const userId = (this.createType('user', appId, rtoId)).id
+ console.log('User (Vehicle Owners) : ' + userId)
+
+ const vehicleId = (this.createType('vehicle', appId, rtoId)).id
+ console.log('Vehicle : ' + vehicleId)
+
+ const userMetadata = {
+ event: 'User Assigned',
+ date: new Date(),
+ timestamp: Date.now(),
+ publicKey: this.vaahanam.appadminPublicKey,
+ eventData: {
+ userType: 'RTO of Mettupalayam'
+ }
+ }
+
+ const rtoassetId_mtp = (this.createUser(this.vaahanam.appadmin, rtoId, 'rto' , this.vaahanam.raPublicKey, userMetadata)).id
+ console.log('RTO of Mettupalayam : ' + rtoassetId_mtp)
+
+ const user2Metadata = {
+ event: 'User Assigned',
+ date: new Date(),
+ timestamp: Date.now(),
+ publicKey: this.vaahanam.appadminPublicKey,
+ eventData: {
+ userType: 'RTO of Chennai South'
+ }
+ }
+
+ // user 2 added to tribe 2
+ const rtoassetId_maa = (this.createUser(this.vaahanam.appadmin, rtoId, 'rto', this.vaahanam.ra1PublicKey, user2Metadata)).id
+ console.log('RTO of Chennai South : ' + rtoassetId_maa)
+
+
+ },
+
+ createTypeInstance(keypair, asset, metadata) {
+
+
+ return this.createNewAsset(keypair, asset, metadata)
+ },
+ createUser(adminKeyPair, userTypeId, userTypeName, userPublicKey, userMetadata) {
+ const asset = {
+ ns: `${nameSpace}.${userTypeName}`,
+ link: userTypeId,
+ createdBy: adminKeyPair.publicKey,
+ type: userTypeName,
+ keyword: 'UserAsset'
+ }
+
+ const metadata = {
+ event: 'User Added',
+ date: new Date(),
+ timestamp: Date.now(),
+ publicKey: userPublicKey,
+ eventData: {
+ userType: userTypeName
+ }
+ }
+
+ const instanceTx = this.createNewAsset(adminKeyPair, asset, metadata)
+ this.transferAsset(instanceTx, adminKeyPair, userPublicKey, userMetadata)
+ return instanceTx
+ },
+ createType(typeName, appId, canLinkAssetId) {
+ const asset = {
+ ns: `${nameSpace}.${typeName}`,
+ link: appId,
+ name: typeName
+ }
+
+ const metadata = {
+ can_link: canLinkAssetId
+ }
+
+ return this.createNewAsset(this.vaahanam.appadmin, asset, metadata)
+ },
+ createNewAsset(keypair, asset, metadata) {
+ console.log('Creating new asset : ',asset)
+
+ //document.getElementById('update').value += '\nCreating new asset : ' + asset
+
+ const API_PATH = 'https://test.bigchaindb.com/api/v1/'
+ let conn = new BigchainDB.Connection(API_PATH)
+
+ let condition = BigchainDB.Transaction.makeEd25519Condition(keypair.publicKey, true)
+
+ let output = BigchainDB.Transaction.makeOutput(condition)
+ output.public_keys = [keypair.publicKey]
+
+ const transaction = BigchainDB.Transaction.makeCreateTransaction(
+ asset,
+ metadata,
+ [ BigchainDB.Transaction.makeOutput(
+ BigchainDB.Transaction.makeEd25519Condition(keypair.publicKey))
+ ],
+ keypair.publicKey
+ )
+
+ const txSigned = BigchainDB.Transaction.signTransaction(transaction, keypair.privateKey)
+
+ console.log('New Asset Creation with Transaction Signed ',txSigned)
+
+ conn.postTransactionCommit(txSigned)
+
+ return txSigned
+ },
+
+ transferAsset(tx, fromKeyPair, toPublicKey, metadata) {
+
+ const API_PATH = 'https://test.bigchaindb.com/api/v1/'
+ let conn = new BigchainDB.Connection(API_PATH)
+
+ let condition = BigchainDB.Transaction.makeEd25519Condition(toPublicKey)
+
+ let output = BigchainDB.Transaction.makeOutput(condition)
+ output.public_keys = [toPublicKey]
+
+ const txTransfer = BigchainDB.Transaction.makeTransferTransaction(
+ [{tx: tx,output_index:0}],
+ [output],
+ metadata
+ )
+
+ const txSigned = BigchainDB.Transaction.signTransaction(txTransfer, fromKeyPair.privateKey)
+ return conn.postTransactionCommit(txSigned)
+ }
+
+/**
+ * Creates Naanayam Tokens for the Vaahan-namchain
+ * @param {int} nTokens - Number of tokens to be created [Value is defined as 44 Million].
+ * @returns {*} The transaction ID.
+ */
+createTokens(nTokens) {
+ console.log('Request to create Tokens '+nTokens)
+
+ const API_PATH = 'https://test.bigchaindb.com/api/v1/'
+
+ console.log('Public key of Token Creator : ', this.tokenCreatorP)
+
+ let conn = new BigchainDB.Connection(API_PATH)
+
+ // Construct a transaction payload
+ const tx = BigchainDB.Transaction.makeCreateTransaction({
+ token: 'Naanayam',
+ link: '2a89589da371d3593d7e1a9fed0c888c794a546f933c6a30aaed2adc5f6511dc',
+ number_tokens: nTokens
+ },
+ // Metadata field, contains information about the transaction itself
+ // (can be `null` if not needed)
+ {
+ can_link: '688f4fec05cf6d01624b3a33a7a2206479be8c5a1a1ef50131418b5b6de91d04',
+ datetime: new Date().toString()
+ },
+ // Output: Divisible asset, include nTokens as parameter
+ [BigchainDB.Transaction.makeOutput(BigchainDB.Transaction.makeEd25519Condition(this.tokenCreatorP), nTokens.toString())],
+ this.tokenCreatorP
+ )
+
+ console.log(tx)
+
+ // Sign the transaction with the private key of the token creator
+ const txSigned = BigchainDB.Transaction
+ .signTransaction(tx, this.tokenCreatorpr)
+
+ console.log(txSigned)
+
+ // Send the transaction off to BigchainDB
+ conn.postTransactionCommit(txSigned)
+ .then(res => {
+ //document.getElementById("transid").innerHTML = txSigned.id
+ const elem = document.getElementById('transid')
+ elem.href = API_PATH + 'transactions/' + txSigned.id
+ elem.innerHTML = txSigned.id
+ })
+
+ return txSigned.id;
+ }
+
+/**
+ * Transfer tokens between two users
+ * @param {int} amountToSend - number of tokens to be transferred
+ * @param {string} receiveraddr - public address of the receiver
+ * @returns {*} The transaction ID.
+ */
+ transfer(amountToSend, receiveraddr) {
+
+ const API_PATH = 'https://test.bigchaindb.com/api/v1/'
+
+ let conn = new BigchainDB.Connection(API_PATH)
+
+ conn.getTransaction(UserPublickey, false)
+ .then((txOutputs) => {
+ console.log(txOutputs)
+
+ let tokens = parseInt(txOutputs['outputs'][0]['amount'])
+
+ console.log('Remaining Tokens',tokens)
+
+ // Create transfer transaction
+ const transferTrans = BigchainDB.Transaction.makeTransferTransaction(
+ [{
+ tx: txOutputs,
+ output_index: 0
+ }],
+ // Transaction output: Two outputs, because the whole input
+ // must be spent
+ [BigchainDB.Transaction.makeOutput(BigchainDB.Transaction.makeEd25519Condition('AbLkgEyeUL2xC2QmnEs21cqHjGJuPcPMXA562996QnCw'),(tokens - amountToSend).toString()),
+ BigchainDB.Transaction.makeOutput(BigchainDB.Transaction.makeEd25519Condition('5dzYagqoqjqr9dWa44XYUpTcfvRrH6tFT9Bw4EvTiHC4'),amountToSend.toString())
+ ],
+ // Metadata (optional)
+ {
+ transfered_to: '5dzYagqoqjqr9dWa44XYUpTcfvRrH6tFT9Bw4EvTiHC4',
+ amountreceived: amountToSend
+ }
+ )
+
+ // Sign the transaction with the tokenCreator key
+ const signedTransfer = BigchainDB.Transaction.signTransaction(transferTrans, Userprivatekey)
+
+ return conn.postTransactionCommit(signedTransfer)
+ })
+ .then((tx) =>{
+ console.log('Response from BDB server:', tx)
+ console.log('Is Ramaguru the owner?', tx['outputs'][1]['public_keys'][0] == '5dzYagqoqjqr9dWa44XYUpTcfvRrH6tFT9Bw4EvTiHC4')
+ const elem = document.getElementById('lastTransaction')
+ elem.href = API_PATH + 'transactions/' + tx.id
+ elem.innerText = txSigned.id
+ console.log('Transaction ID : ', tx.id, ' is accepted') })
+
+ return tx.id
+ }
+
+ /**
+ * Registers the vehicle, the vehicle owner and creates a relationship between these two assets
+ * @param {string} pub - public key of the vehicle owner
+ * @param {string} aadhar - aadhar number of the vehicle owner
+ * @param {string} engno - Engine number of the vehicle
+ * @param {string} chasisno - Chasis number of the vehicle
+ * @param {string} vmodel - Vehicle Model
+ * @param {string} vservice - Vehicle Service Provider
+ * @param {string} vtype - Vehicle Type
+ * @param {string} regno - Registration Number
+ */
+registervehicle1(pub,rto,aadhar,engno,chasisno,vmodel,vservice,vtype,regno){
+
+ typeName = 'vehicle'
+ typeId = '66b8a260073a94a2bb9b3e6a419e0f36b6967dcaa492640a8893652af6c713aa'
+
+ const asset = {
+ ns: `${nameSpace}.${typeName}`,
+ link: typeId,
+ Regional_Transport_Office : rto,
+ Engine_number: engno,
+ Chasis_number: chasisno,
+ Vehicle_model: vmodel,
+ Vehicle_type: vtype,
+ Vehicle_service: vservice,
+ Registration_number: regno,
+ Time_of_Registration: new Date().toString(),
+ }
+
+ const userMetadata = {
+ event: 'User Assigned',
+ date: new Date(),
+ timestamp: Date.now(),
+ publicKey: this.vaahanam.raPublicKey,
+ eventData: {
+ userType: aadhar
+ }
+ }
+
+ const userid = (this.createUser(this.vaahanam.ra, '6bfa6e454a81f6fbc189fe7edc4e79102c791e128fd2fc643d82a18cde4425be', 'user' , pub, userMetadata)).id
+ const tx = (this.createTypeInstance(this.vaahanam.ra, asset, { event: 'Vehicle Created', owner: userid })).id;
+
+ console.log(tx)
+ document.getElementById('transid').value = tx;
+ }
+
+ /**
+ * Querying blockchain to get the vehicle details based on transaction ID
+ * @param {string} tid - Transaction ID
+ */
+getvehicleTID(tid){
+ const API_PATH = 'https://test.bigchaindb.com/api/v1/'
+ let conn = new BigchainDB.Connection(API_PATH)
+
+ conn.getTransaction(tid)
+ .then((res) => {
+ console.log('Found Transaction with TID ', tid, ' and content ', res);
+ console.log(res['asset']['data']['Regional_Transport_Office']);
+ console.log(res['asset']['data']['Engine_number']);
+ console.log(res['asset']['data']['Chasis_number']);
+ console.log(res['asset']['data']['Vehicle_model']);
+ console.log(res['asset']['data']['Vehicle_type']);
+ console.log(res['asset']['data']['Vehicle_service']);
+ console.log(res['asset']['data']['Time_of_Registration']);
+ document.getElementById("rtodet").innerHTML = res['asset']['data']['Regional_Transport_Office'];
+ document.getElementById("engnodet").innerHTML = res['asset']['data']['Engine_number'];
+ document.getElementById("cnodet").innerHTML = res['asset']['data']['Chasis_number'];
+ document.getElementById("vmoddet").innerHTML = res['asset']['data']['Vehicle_model'];
+ document.getElementById("vtypedet").innerHTML = res['asset']['data']['Vehicle_type'];
+ document.getElementById("vssdet").innerHTML = res['asset']['data']['Vehicle_service'];
+ document.getElementById("timedet").innerHTML = res['asset']['data']['Time_of_Registration'];
+ })
+ }
+
+ /**
+ * Invoked by smartcontract to send the critical DTC and corresponding log hash to blockchain
+ * @param {string} assetid - Vehicle assetid
+ * @param {string} ipfshash - IPFS hash of the log file stored
+ * @param {string} smartcontract - IPFS hash of the smartcontract that invoked this
+ * @param {string} dtc - Diagnostic trouble code set in the vehicle
+ */
+senddtc(assetid, ipfshash, smartcontract, dtc){
+ //Invoked by Smart Contracts
+ console.log('invoked smart contract for assetid ', assetid, 'ipfshash ', ipfshash,' with dtc set to ', dtc)
+
+ const API_PATH = 'https://test.bigchaindb.com/api/v1/'
+ let conn = new BigchainDB.Connection(API_PATH)
+
+ conn.getTransaction(assetid)
+ .then((res) => {
+ console.log(res);
+ assetidofuser = res['metadata']['owner'];
+ console.log(assetidofuser);
+
+ conn.getTransaction(assetidofuser)
+ .then((txuser) => {
+
+ pub = txuser['metadata']['publicKey'];
+
+ console.log('Public key of Token Creator : ', pub)
+
+ // Construct a transaction payload
+ const tx = BigchainDB.Transaction.makeCreateTransaction({
+ vehicle: assetid,
+ dtc : dtc
+ log_hash: ipfshash,
+ smartcontract_hash: smartcontract
+ },
+ // Metadata field, contains information about the transaction itself
+ // (can be `null` if not needed)
+ {
+ datetime: new Date().toString()
+ },
+ // Output: Divisible asset, include nTokens as parameter
+ [BigchainDB.Transaction.makeOutput(BigchainDB.Transaction.makeEd25519Condition(pub))],
+ pub
+ )
+
+ console.log(tx)
+
+ // Sign the transaction with the private key of the token creator
+ const txSigned = BigchainDB.Transaction.signTransaction(tx, pub)
+
+ console.log(txSigned)
+
+ conn.postTransactionCommit(txSigned)
+
+ console.log(txSigned.id)
+ })
+ })
+ }