85 lines
2.9 KiB
TypeScript
85 lines
2.9 KiB
TypeScript
import { Injectable } from '@angular/core';
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import { CICRegistry } from '@cicnet/cic-client';
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import { TokenRegistry } from '@app/_eth';
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import { RegistryService } from '@app/_services/registry.service';
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import { Token } from '@app/_models';
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import { BehaviorSubject, Observable, Subject } from 'rxjs';
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@Injectable({
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providedIn: 'root',
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})
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export class TokenService {
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registry: CICRegistry;
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tokenRegistry: TokenRegistry;
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tokens: Array<Token> = [];
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private tokensList: BehaviorSubject<Array<Token>> = new BehaviorSubject<Array<Token>>(
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this.tokens
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);
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tokensSubject: Observable<Array<Token>> = this.tokensList.asObservable();
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load: BehaviorSubject<any> = new BehaviorSubject<any>(false);
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constructor() {}
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async init(): Promise<void> {
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this.registry = await RegistryService.getRegistry();
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this.tokenRegistry = await RegistryService.getTokenRegistry();
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this.load.next(true);
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}
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addToken(token: Token): void {
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const savedIndex = this.tokens.findIndex((tk) => tk.address === token.address);
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if (savedIndex === 0) {
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return;
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}
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if (savedIndex > 0) {
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this.tokens.splice(savedIndex, 1);
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}
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this.tokens.unshift(token);
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this.tokensList.next(this.tokens);
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}
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async getTokens(): Promise<void> {
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const count: number = await this.tokenRegistry.totalTokens();
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for (let i = 0; i < count; i++) {
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const token: Token = await this.getTokenByAddress(await this.tokenRegistry.entry(i));
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this.addToken(token);
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}
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}
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async getTokenByAddress(address: string): Promise<Token> {
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const token: any = {};
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const tokenContract = await this.registry.addToken(address);
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token.address = address;
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token.name = await tokenContract.methods.name().call();
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token.symbol = await tokenContract.methods.symbol().call();
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token.supply = await tokenContract.methods.totalSupply().call();
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token.decimals = await tokenContract.methods.decimals().call();
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return token;
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}
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async getTokenBySymbol(symbol: string): Promise<Observable<Token>> {
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const tokenSubject: Subject<Token> = new Subject<Token>();
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await this.getTokens();
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this.tokensSubject.subscribe((tokens) => {
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const queriedToken = tokens.find((token) => token.symbol === symbol);
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tokenSubject.next(queriedToken);
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});
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return tokenSubject.asObservable();
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}
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async getTokenBalance(address: string): Promise<(address: string) => Promise<number>> {
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const token = await this.registry.addToken(await this.tokenRegistry.entry(0));
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return await token.methods.balanceOf(address).call();
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}
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async getTokenName(): Promise<string> {
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const token = await this.registry.addToken(await this.tokenRegistry.entry(0));
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return await token.methods.name().call();
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}
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async getTokenSymbol(): Promise<string> {
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const token = await this.registry.addToken(await this.tokenRegistry.entry(0));
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return await token.methods.symbol().call();
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}
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}
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