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167 changes: 167 additions & 0 deletions
167
modules/command/dh/dh-data-read-request-free-command.js
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,167 @@ | ||
| const Models = require('../../../models/index'); | ||
| const Command = require('../command'); | ||
|
|
||
| const BN = require('bn.js'); | ||
| const Utilities = require('../../Utilities'); | ||
| const ImportUtilities = require('../../ImportUtilities'); | ||
| const Graph = require('../../Graph'); | ||
|
|
||
| /** | ||
| * Free read request command. | ||
| */ | ||
| class DHDataReadRequestFreeCommand extends Command { | ||
| constructor(ctx) { | ||
| super(ctx); | ||
| this.logger = ctx.logger; | ||
| this.graphStorage = ctx.graphStorage; | ||
| this.config = ctx.config; | ||
| this.web3 = ctx.web3; | ||
| this.network = ctx.network; | ||
| this.notifyError = ctx.notifyError; | ||
| } | ||
|
|
||
| /** | ||
| * Executes command and produces one or more events | ||
| * @param command | ||
| * @param transaction | ||
| */ | ||
| async execute(command, transaction) { | ||
| const { | ||
| message, | ||
| } = command.data; | ||
|
|
||
| /* | ||
| message: { | ||
| id: REPLY_ID, | ||
| import_id: IMPORT_ID, | ||
| wallet: DH_WALLET, | ||
| nodeId: KAD_ID | ||
| } | ||
| */ | ||
|
|
||
| // TODO in order to avoid getting a different import. | ||
| const { | ||
| nodeId, wallet, id, import_id, | ||
| } = message; | ||
| try { | ||
| // Check is it mine offer. | ||
| const networkReplyModel = await Models.network_replies.find({ where: { id } }); | ||
| if (!networkReplyModel) { | ||
| throw Error(`Couldn't find reply with ID ${id}.`); | ||
| } | ||
|
|
||
| const offer = networkReplyModel.data; | ||
|
|
||
| if (networkReplyModel.receiver_wallet !== wallet && | ||
| networkReplyModel.receiver_identity) { | ||
| throw Error('Sorry not your read request'); | ||
| } | ||
|
|
||
| // TODO: Only one import ID used. Later we'll support replication from multiple imports. | ||
| // eslint-disable-next-line | ||
| const importId = import_id; | ||
|
|
||
| const verticesPromise = this.graphStorage.findVerticesByImportId(importId); | ||
| const edgesPromise = this.graphStorage.findEdgesByImportId(importId); | ||
|
|
||
| const values = await Promise.all([verticesPromise, edgesPromise]); | ||
| const vertices = values[0]; | ||
| const edges = values[1]; | ||
|
|
||
| ImportUtilities.unpackKeys(vertices, edges); | ||
|
|
||
| const dataInfo = await Models.data_info.findOne({ | ||
| where: { | ||
| import_id: importId, | ||
| }, | ||
| }); | ||
|
|
||
| if (!dataInfo) { | ||
| throw Error(`Failed to get data info for import ID ${importId}.`); | ||
| } | ||
|
|
||
| ImportUtilities.deleteInternal(vertices); | ||
|
|
||
| // Get replication key and then encrypt data. | ||
| const holdingDataModel = await Models.holding_data.find({ where: { id: importId } }); | ||
|
|
||
| if (holdingDataModel) { | ||
| const holdingData = holdingDataModel.get({ plain: true }); | ||
| const dataPublicKey = holdingData.data_public_key; | ||
| const replicationPrivateKey = holdingData.distribution_private_key; | ||
|
|
||
| Graph.decryptVertices( | ||
| vertices.filter(vertex => vertex.vertex_type !== 'CLASS'), | ||
| dataPublicKey, | ||
| ); | ||
| } | ||
|
|
||
| /* | ||
| dataReadResponseObject = { | ||
| message: { | ||
| id: REPLY_ID | ||
| wallet: DH_WALLET, | ||
| nodeId: KAD_ID | ||
| agreementStatus: CONFIRMED/REJECTED, | ||
| data_provider_wallet, | ||
| encryptedData: { … } | ||
| }, | ||
| messageSignature: { | ||
| c: …, | ||
| r: …, | ||
| s: … | ||
| } | ||
| } | ||
| */ | ||
|
|
||
| const replyMessage = { | ||
| id, | ||
| wallet: this.config.node_wallet, | ||
| nodeId: this.config.identity, | ||
| data_provider_wallet: dataInfo.data_provider_wallet, | ||
| agreementStatus: 'CONFIRMED', | ||
| data: { | ||
| vertices, | ||
| edges, | ||
| }, | ||
| import_id: importId, // TODO: Temporal. Remove it. | ||
| }; | ||
| const dataReadResponseObject = { | ||
| message: replyMessage, | ||
| messageSignature: Utilities.generateRsvSignature( | ||
| JSON.stringify(replyMessage), | ||
| this.web3, | ||
| this.config.node_private_key, | ||
| ), | ||
| }; | ||
|
|
||
| await this.network.kademlia().sendDataReadResponse(dataReadResponseObject, nodeId); | ||
| } catch (e) { | ||
| const errorMessage = `Failed to process data read request. ${e}.`; | ||
| this.logger.warn(errorMessage); | ||
| this.notifyError(e); | ||
| await this.network.kademlia().sendDataReadResponse({ | ||
| status: 'FAIL', | ||
| message: errorMessage, | ||
| }, nodeId); | ||
| } | ||
|
|
||
| return Command.empty(); | ||
| } | ||
|
|
||
| /** | ||
| * Builds default command | ||
| * @param map | ||
| * @returns {{add, data: *, delay: *, deadline: *}} | ||
| */ | ||
| default(map) { | ||
| const command = { | ||
| name: 'dhDataReadRequestFreeCommand', | ||
| transactional: true, | ||
| }; | ||
| Object.assign(command, map); | ||
| return command; | ||
| } | ||
| } | ||
|
|
||
| module.exports = DHDataReadRequestFreeCommand; |
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