nft-folder-blockchain-connector-besu/dist/token/service/event.service.js

A NestJS-based blockchain connector that communicates with specific smart contracts from the NFT Folder project.

"use strict";
var __decorate = (this && this.__decorate) || function (decorators, target, key, desc) {
    var c = arguments.length, r = c < 3 ? target : desc === null ? desc = Object.getOwnPropertyDescriptor(target, key) : desc, d;
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    return c > 3 && r && Object.defineProperty(target, key, r), r;
};
var __metadata = (this && this.__metadata) || function (k, v) {
    if (typeof Reflect === "object" && typeof Reflect.metadata === "function") return Reflect.metadata(k, v);
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.EventService = void 0;
const common_1 = require("@nestjs/common");
const blockchain_service_1 = require("../../shared/blockchain.service");
const configuration_service_1 = require("../../configuration/configuration.service");
const transfer_event_dto_1 = require("../dto/transfer-event.dto");
let EventService = class EventService {
    blockchainService;
    configurationService;
    tokenContract;
    constructor(blockchainService, configurationService) {
        this.blockchainService = blockchainService;
        this.configurationService = configurationService;
        this.tokenContract = this.blockchainService.getContractInstance(this.configurationService.getBlockchainConfiguration().tokenAddress, this.configurationService.getBlockchainConfiguration().tokenAbi);
    }
    async fetchTokenInformation(tokenId) {
        const minterAddress = await this.fetchMinterAddress(tokenId);
        const createdOn = await this.fetchCreatedOn(tokenId);
        const lastUpdatedOn = await this.fetchLastUpdatedOn(tokenId);
        return { minterAddress, createdOn, lastUpdatedOn };
    }
    async fetchTransferEvents(tokenId) {
        const events = await this.getAllPastEvents('Transfer', tokenId);
        return Promise.all(events.map(async (event) => {
            return new transfer_event_dto_1.TransferEventDto(tokenId, `0x${event.topics[1].slice(26, 66)}`, `0x${event.topics[2].slice(26, 66)}`, await this.blockchainService.fetchTransactionTimestamp(event.transactionHash));
        }));
    }
    async fetchMinterAddress(tokenId) {
        const events = await this.getAllPastEvents('Transfer', tokenId);
        return events.length === 0 ? null : events[0].args.to;
    }
    async fetchCreatedOn(tokenId) {
        const events = await this.getAllPastEvents('Transfer', tokenId);
        const transactionHash = events.length === 0 ? '' : events[0].transactionHash;
        return this.blockchainService.fetchTransactionTimestamp(transactionHash);
    }
    async fetchLastUpdatedOn(tokenId) {
        const eventInformation = await this.fetchEventInformationFromLastEvent(tokenId, 'TokenUpdate');
        return await this.blockchainService.fetchTransactionTimestamp(eventInformation.transactionHash);
    }
    async getAllPastEvents(event, tokenId) {
        let filter;
        if (event === 'Transfer') {
            filter = this.tokenContract.filters.Transfer(null, null, tokenId);
        }
        if (event === 'TokenUpdate') {
            filter = this.tokenContract.filters.TokenUpdate(null, null, tokenId);
        }
        return (await this.tokenContract.queryFilter(filter));
    }
    async fetchEventInformationFromLastEvent(tokenId, event) {
        const events = await this.getAllPastEvents(event, tokenId);
        return events.length === 0
            ? {
                blockNumber: -1,
                transactionHash: '',
            }
            : {
                blockNumber: events[events.length - 1].blockNumber,
                transactionHash: events[events.length - 1].transactionHash,
            };
    }
    decodeLogs(contractInterface, transactionReceipt, eventNames) {
        const decodedLogs = transactionReceipt?.logs
            ? transactionReceipt.logs
                .map((encodedLog) => {
                const decodedLog = contractInterface.parseLog(encodedLog);
                return decodedLog ? (eventNames.includes(decodedLog.name) ? decodedLog : null) : null;
            })
                .filter((decodedLog) => {
                return decodedLog !== null && decodedLog !== undefined;
            })
            : [];
        if (decodedLogs.length === 0) {
            throw new Error(`No event found in transaction receipt logs. Event names: ${eventNames.join(', ')}`);
        }
        return decodedLogs;
    }
};
exports.EventService = EventService;
exports.EventService = EventService = __decorate([
    (0, common_1.Injectable)(),
    __metadata("design:paramtypes", [blockchain_service_1.BlockchainService,
        configuration_service_1.ConfigurationService])
], EventService);
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