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<ol class="breadcrumb">
  <li>Injectables</li>
  <li>TokenService</li>
</ol>

<ul class="nav nav-tabs" role="tablist">
        <li class="active">
            <a href="#info" role="tab" id="info-tab" data-toggle="tab" data-link="info">Info</a>
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            <a href="#source" role="tab" id="source-tab" data-toggle="tab" data-link="source">Source</a>
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</ul>

<div class="tab-content">
    <div class="tab-pane fade active in" id="c-info">
        <p class="comment">
            <h3>File</h3>
        </p>
        <p class="comment">
            <code>src/app/_services/token.service.ts</code>
        </p>




            <section>
    <h3 id="index">Index</h3>
    <table class="table table-sm table-bordered index-table">
        <tbody>
                <tr>
                    <td class="col-md-4">
                        <h6><b>Properties</b></h6>
                    </td>
                </tr>
                <tr>
                    <td class="col-md-4">
                        <ul class="index-list">
                            <li>
                                <a href="#load">load</a>
                            </li>
                            <li>
                                <a href="#registry">registry</a>
                            </li>
                            <li>
                                <a href="#tokenRegistry">tokenRegistry</a>
                            </li>
                            <li>
                                <a href="#tokens">tokens</a>
                            </li>
                            <li>
                                    <span class="modifier">Private</span>
                                <a href="#tokensList">tokensList</a>
                            </li>
                            <li>
                                <a href="#tokensSubject">tokensSubject</a>
                            </li>
                        </ul>
                    </td>
                </tr>

                <tr>
                    <td class="col-md-4">
                        <h6><b>Methods</b></h6>
                    </td>
                </tr>
                <tr>
                    <td class="col-md-4">
                        <ul class="index-list">
                            <li>
                                <a href="#addToken">addToken</a>
                            </li>
                            <li>
                                    <span class="modifier">Async</span>
                                <a href="#getTokenBalance">getTokenBalance</a>
                            </li>
                            <li>
                                    <span class="modifier">Async</span>
                                <a href="#getTokenByAddress">getTokenByAddress</a>
                            </li>
                            <li>
                                    <span class="modifier">Async</span>
                                <a href="#getTokenBySymbol">getTokenBySymbol</a>
                            </li>
                            <li>
                                    <span class="modifier">Async</span>
                                <a href="#getTokenName">getTokenName</a>
                            </li>
                            <li>
                                    <span class="modifier">Async</span>
                                <a href="#getTokens">getTokens</a>
                            </li>
                            <li>
                                    <span class="modifier">Async</span>
                                <a href="#getTokenSymbol">getTokenSymbol</a>
                            </li>
                            <li>
                                    <span class="modifier">Async</span>
                                <a href="#init">init</a>
                            </li>
                        </ul>
                    </td>
                </tr>





        </tbody>
    </table>
</section>

            <section>
    <h3 id="constructor">Constructor</h3>
        <table class="table table-sm table-bordered">
            <tbody>
                <tr>
                    <td class="col-md-4">
<code>constructor()</code>
                    </td>
                </tr>
                        <tr>
                            <td class="col-md-4">
                                <div class="io-line">Defined in <a href="" data-line="19" class="link-to-prism">src/app/_services/token.service.ts:19</a></div>
                            </td>
                        </tr>

            </tbody>
        </table>
</section>

            <section>
    
    <h3 id="methods">
        Methods
    </h3>
    <table class="table table-sm table-bordered">
        <tbody>
            <tr>
                <td class="col-md-4">
                    <a name="addToken"></a>
                    <span class="name">
                        <b>
                            addToken
                        </b>
                        <a href="#addToken"><span class="icon ion-ios-link"></span></a>
                    </span>
                </td>
            </tr>
            <tr>
                <td class="col-md-4">
<code>addToken(token: <a href="../interfaces/Token.html">Token</a>)</code>
                </td>
            </tr>


            <tr>
                <td class="col-md-4">
                    <div class="io-line">Defined in <a href="" data-line="31"
                            class="link-to-prism">src/app/_services/token.service.ts:31</a></div>
                </td>
            </tr>


            <tr>
                <td class="col-md-4">

                    <div class="io-description">
                        <b>Parameters :</b>
                        <table class="params">
                            <thead>
                                <tr>
                                    <td>Name</td>
                                    <td>Type</td>
                                    <td>Optional</td>
                                </tr>
                            </thead>
                            <tbody>
                                <tr>
                                    <td>token</td>
                                    <td>
                                                <code><a href="../interfaces/Token.html" target="_self" >Token</a></code>
                                    </td>

                                    <td>
                                        No
                                    </td>


                                </tr>
                            </tbody>
                        </table>
                    </div>
                    <div>
                    </div>
                    <div class="io-description">
                        <b>Returns : </b>        <code><a href="https://www.typescriptlang.org/docs/handbook/basic-types.html" target="_blank" >void</a></code>

                    </div>
                    <div class="io-description">
                        
                    </div>
                </td>
            </tr>
        </tbody>
    </table>
    <table class="table table-sm table-bordered">
        <tbody>
            <tr>
                <td class="col-md-4">
                    <a name="getTokenBalance"></a>
                    <span class="name">
                        <b>
                            <span class="modifier">Async</span>
                            getTokenBalance
                        </b>
                        <a href="#getTokenBalance"><span class="icon ion-ios-link"></span></a>
                    </span>
                </td>
            </tr>
            <tr>
                <td class="col-md-4">
                    <span class="modifier-icon icon ion-ios-reset"></span>
                    <code>getTokenBalance(address: <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/string" target="_blank">string</a>)</code>
                </td>
            </tr>


            <tr>
                <td class="col-md-4">
                    <div class="io-line">Defined in <a href="" data-line="72"
                            class="link-to-prism">src/app/_services/token.service.ts:72</a></div>
                </td>
            </tr>


            <tr>
                <td class="col-md-4">

                    <div class="io-description">
                        <b>Parameters :</b>
                        <table class="params">
                            <thead>
                                <tr>
                                    <td>Name</td>
                                    <td>Type</td>
                                    <td>Optional</td>
                                </tr>
                            </thead>
                            <tbody>
                                <tr>
                                    <td>address</td>
                                    <td>
                                                <code><a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/string" target="_blank" >string</a></code>
                                    </td>

                                    <td>
                                        No
                                    </td>


                                </tr>
                            </tbody>
                        </table>
                    </div>
                    <div>
                    </div>
                    <div class="io-description">
                        <b>Returns : </b>    <code>Promise&lt;Promise&lt;number&gt;&gt;</code>

                    </div>
                    <div class="io-description">
                        
                    </div>
                </td>
            </tr>
        </tbody>
    </table>
    <table class="table table-sm table-bordered">
        <tbody>
            <tr>
                <td class="col-md-4">
                    <a name="getTokenByAddress"></a>
                    <span class="name">
                        <b>
                            <span class="modifier">Async</span>
                            getTokenByAddress
                        </b>
                        <a href="#getTokenByAddress"><span class="icon ion-ios-link"></span></a>
                    </span>
                </td>
            </tr>
            <tr>
                <td class="col-md-4">
                    <span class="modifier-icon icon ion-ios-reset"></span>
                    <code>getTokenByAddress(address: <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/string" target="_blank">string</a>)</code>
                </td>
            </tr>


            <tr>
                <td class="col-md-4">
                    <div class="io-line">Defined in <a href="" data-line="51"
                            class="link-to-prism">src/app/_services/token.service.ts:51</a></div>
                </td>
            </tr>


            <tr>
                <td class="col-md-4">

                    <div class="io-description">
                        <b>Parameters :</b>
                        <table class="params">
                            <thead>
                                <tr>
                                    <td>Name</td>
                                    <td>Type</td>
                                    <td>Optional</td>
                                </tr>
                            </thead>
                            <tbody>
                                <tr>
                                    <td>address</td>
                                    <td>
                                                <code><a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/string" target="_blank" >string</a></code>
                                    </td>

                                    <td>
                                        No
                                    </td>


                                </tr>
                            </tbody>
                        </table>
                    </div>
                    <div>
                    </div>
                    <div class="io-description">
                        <b>Returns : </b>        <code><a href="../interfaces/Token.html" target="_self" >Promise&lt;Token&gt;</a></code>

                    </div>
                    <div class="io-description">
                        
                    </div>
                </td>
            </tr>
        </tbody>
    </table>
    <table class="table table-sm table-bordered">
        <tbody>
            <tr>
                <td class="col-md-4">
                    <a name="getTokenBySymbol"></a>
                    <span class="name">
                        <b>
                            <span class="modifier">Async</span>
                            getTokenBySymbol
                        </b>
                        <a href="#getTokenBySymbol"><span class="icon ion-ios-link"></span></a>
                    </span>
                </td>
            </tr>
            <tr>
                <td class="col-md-4">
                    <span class="modifier-icon icon ion-ios-reset"></span>
                    <code>getTokenBySymbol(symbol: <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/string" target="_blank">string</a>)</code>
                </td>
            </tr>


            <tr>
                <td class="col-md-4">
                    <div class="io-line">Defined in <a href="" data-line="62"
                            class="link-to-prism">src/app/_services/token.service.ts:62</a></div>
                </td>
            </tr>


            <tr>
                <td class="col-md-4">

                    <div class="io-description">
                        <b>Parameters :</b>
                        <table class="params">
                            <thead>
                                <tr>
                                    <td>Name</td>
                                    <td>Type</td>
                                    <td>Optional</td>
                                </tr>
                            </thead>
                            <tbody>
                                <tr>
                                    <td>symbol</td>
                                    <td>
                                                <code><a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/string" target="_blank" >string</a></code>
                                    </td>

                                    <td>
                                        No
                                    </td>


                                </tr>
                            </tbody>
                        </table>
                    </div>
                    <div>
                    </div>
                    <div class="io-description">
                        <b>Returns : </b>        <code><a href="../interfaces/Token.html" target="_self" >Promise&lt;Observable&lt;Token&gt;&gt;</a></code>

                    </div>
                    <div class="io-description">
                        
                    </div>
                </td>
            </tr>
        </tbody>
    </table>
    <table class="table table-sm table-bordered">
        <tbody>
            <tr>
                <td class="col-md-4">
                    <a name="getTokenName"></a>
                    <span class="name">
                        <b>
                            <span class="modifier">Async</span>
                            getTokenName
                        </b>
                        <a href="#getTokenName"><span class="icon ion-ios-link"></span></a>
                    </span>
                </td>
            </tr>
            <tr>
                <td class="col-md-4">
                    <span class="modifier-icon icon ion-ios-reset"></span>
                    <code>getTokenName()</code>
                </td>
            </tr>


            <tr>
                <td class="col-md-4">
                    <div class="io-line">Defined in <a href="" data-line="77"
                            class="link-to-prism">src/app/_services/token.service.ts:77</a></div>
                </td>
            </tr>


            <tr>
                <td class="col-md-4">

                    <div class="io-description">
                        <b>Returns : </b>    <code>Promise&lt;string&gt;</code>

                    </div>
                </td>
            </tr>
        </tbody>
    </table>
    <table class="table table-sm table-bordered">
        <tbody>
            <tr>
                <td class="col-md-4">
                    <a name="getTokens"></a>
                    <span class="name">
                        <b>
                            <span class="modifier">Async</span>
                            getTokens
                        </b>
                        <a href="#getTokens"><span class="icon ion-ios-link"></span></a>
                    </span>
                </td>
            </tr>
            <tr>
                <td class="col-md-4">
                    <span class="modifier-icon icon ion-ios-reset"></span>
                    <code>getTokens()</code>
                </td>
            </tr>


            <tr>
                <td class="col-md-4">
                    <div class="io-line">Defined in <a href="" data-line="43"
                            class="link-to-prism">src/app/_services/token.service.ts:43</a></div>
                </td>
            </tr>


            <tr>
                <td class="col-md-4">

                    <div class="io-description">
                        <b>Returns : </b>    <code>Promise&lt;void&gt;</code>

                    </div>
                </td>
            </tr>
        </tbody>
    </table>
    <table class="table table-sm table-bordered">
        <tbody>
            <tr>
                <td class="col-md-4">
                    <a name="getTokenSymbol"></a>
                    <span class="name">
                        <b>
                            <span class="modifier">Async</span>
                            getTokenSymbol
                        </b>
                        <a href="#getTokenSymbol"><span class="icon ion-ios-link"></span></a>
                    </span>
                </td>
            </tr>
            <tr>
                <td class="col-md-4">
                    <span class="modifier-icon icon ion-ios-reset"></span>
                    <code>getTokenSymbol()</code>
                </td>
            </tr>


            <tr>
                <td class="col-md-4">
                    <div class="io-line">Defined in <a href="" data-line="82"
                            class="link-to-prism">src/app/_services/token.service.ts:82</a></div>
                </td>
            </tr>


            <tr>
                <td class="col-md-4">

                    <div class="io-description">
                        <b>Returns : </b>    <code>Promise&lt;string&gt;</code>

                    </div>
                </td>
            </tr>
        </tbody>
    </table>
    <table class="table table-sm table-bordered">
        <tbody>
            <tr>
                <td class="col-md-4">
                    <a name="init"></a>
                    <span class="name">
                        <b>
                            <span class="modifier">Async</span>
                            init
                        </b>
                        <a href="#init"><span class="icon ion-ios-link"></span></a>
                    </span>
                </td>
            </tr>
            <tr>
                <td class="col-md-4">
                    <span class="modifier-icon icon ion-ios-reset"></span>
                    <code>init()</code>
                </td>
            </tr>


            <tr>
                <td class="col-md-4">
                    <div class="io-line">Defined in <a href="" data-line="23"
                            class="link-to-prism">src/app/_services/token.service.ts:23</a></div>
                </td>
            </tr>


            <tr>
                <td class="col-md-4">

                    <div class="io-description">
                        <b>Returns : </b>    <code>Promise&lt;void&gt;</code>

                    </div>
                </td>
            </tr>
        </tbody>
    </table>
</section>
            <section>
    
        <h3 id="inputs">
            Properties
        </h3>
        <table class="table table-sm table-bordered">
            <tbody>
                <tr>
                    <td class="col-md-4">
                        <a name="load"></a>
                        <span class="name">
                            <b>
                            load</b>
                            <a href="#load"><span class="icon ion-ios-link"></span></a>
                        </span>
                    </td>
                </tr>
                    <tr>
                        <td class="col-md-4">
                            <i>Type : </i>    <code>BehaviorSubject&lt;any&gt;</code>

                        </td>
                    </tr>
                    <tr>
                        <td class="col-md-4">
                            <i>Default value : </i><code>new BehaviorSubject&lt;any&gt;(false)</code>
                        </td>
                    </tr>
                        <tr>
                            <td class="col-md-4">
                                    <div class="io-line">Defined in <a href="" data-line="19" class="link-to-prism">src/app/_services/token.service.ts:19</a></div>
                            </td>
                        </tr>


            </tbody>
        </table>
        <table class="table table-sm table-bordered">
            <tbody>
                <tr>
                    <td class="col-md-4">
                        <a name="registry"></a>
                        <span class="name">
                            <b>
                            registry</b>
                            <a href="#registry"><span class="icon ion-ios-link"></span></a>
                        </span>
                    </td>
                </tr>
                    <tr>
                        <td class="col-md-4">
                            <i>Type : </i>    <code>CICRegistry</code>

                        </td>
                    </tr>
                        <tr>
                            <td class="col-md-4">
                                    <div class="io-line">Defined in <a href="" data-line="12" class="link-to-prism">src/app/_services/token.service.ts:12</a></div>
                            </td>
                        </tr>


            </tbody>
        </table>
        <table class="table table-sm table-bordered">
            <tbody>
                <tr>
                    <td class="col-md-4">
                        <a name="tokenRegistry"></a>
                        <span class="name">
                            <b>
                            tokenRegistry</b>
                            <a href="#tokenRegistry"><span class="icon ion-ios-link"></span></a>
                        </span>
                    </td>
                </tr>
                    <tr>
                        <td class="col-md-4">
                            <i>Type : </i>        <code><a href="../interfaces/Token.html" target="_self" >TokenRegistry</a></code>

                        </td>
                    </tr>
                        <tr>
                            <td class="col-md-4">
                                    <div class="io-line">Defined in <a href="" data-line="13" class="link-to-prism">src/app/_services/token.service.ts:13</a></div>
                            </td>
                        </tr>


            </tbody>
        </table>
        <table class="table table-sm table-bordered">
            <tbody>
                <tr>
                    <td class="col-md-4">
                        <a name="tokens"></a>
                        <span class="name">
                            <b>
                            tokens</b>
                            <a href="#tokens"><span class="icon ion-ios-link"></span></a>
                        </span>
                    </td>
                </tr>
                    <tr>
                        <td class="col-md-4">
                            <i>Type : </i>        <code><a href="../interfaces/Token.html" target="_self" >Array&lt;Token&gt;</a></code>

                        </td>
                    </tr>
                    <tr>
                        <td class="col-md-4">
                            <i>Default value : </i><code>[]</code>
                        </td>
                    </tr>
                        <tr>
                            <td class="col-md-4">
                                    <div class="io-line">Defined in <a href="" data-line="14" class="link-to-prism">src/app/_services/token.service.ts:14</a></div>
                            </td>
                        </tr>


            </tbody>
        </table>
        <table class="table table-sm table-bordered">
            <tbody>
                <tr>
                    <td class="col-md-4">
                        <a name="tokensList"></a>
                        <span class="name">
                            <b>
                                <span class="modifier">Private</span>
                            tokensList</b>
                            <a href="#tokensList"><span class="icon ion-ios-link"></span></a>
                        </span>
                    </td>
                </tr>
                    <tr>
                        <td class="col-md-4">
                            <i>Type : </i>        <code><a href="../interfaces/Token.html" target="_self" >BehaviorSubject&lt;Array&lt;Token&gt;&gt;</a></code>

                        </td>
                    </tr>
                    <tr>
                        <td class="col-md-4">
                            <i>Default value : </i><code>new BehaviorSubject&lt;Array&lt;Token&gt;&gt;(
    this.tokens
  )</code>
                        </td>
                    </tr>
                        <tr>
                            <td class="col-md-4">
                                    <div class="io-line">Defined in <a href="" data-line="15" class="link-to-prism">src/app/_services/token.service.ts:15</a></div>
                            </td>
                        </tr>


            </tbody>
        </table>
        <table class="table table-sm table-bordered">
            <tbody>
                <tr>
                    <td class="col-md-4">
                        <a name="tokensSubject"></a>
                        <span class="name">
                            <b>
                            tokensSubject</b>
                            <a href="#tokensSubject"><span class="icon ion-ios-link"></span></a>
                        </span>
                    </td>
                </tr>
                    <tr>
                        <td class="col-md-4">
                            <i>Type : </i>        <code><a href="../interfaces/Token.html" target="_self" >Observable&lt;Array&lt;Token&gt;&gt;</a></code>

                        </td>
                    </tr>
                    <tr>
                        <td class="col-md-4">
                            <i>Default value : </i><code>this.tokensList.asObservable()</code>
                        </td>
                    </tr>
                        <tr>
                            <td class="col-md-4">
                                    <div class="io-line">Defined in <a href="" data-line="18" class="link-to-prism">src/app/_services/token.service.ts:18</a></div>
                            </td>
                        </tr>


            </tbody>
        </table>
</section>

    </div>


    <div class="tab-pane fade  tab-source-code" id="c-source">
        <pre class="line-numbers compodoc-sourcecode"><code class="language-typescript">import { Injectable } from &#x27;@angular/core&#x27;;
import { CICRegistry } from &#x27;@cicnet/cic-client&#x27;;
import { TokenRegistry } from &#x27;@app/_eth&#x27;;
import { RegistryService } from &#x27;@app/_services/registry.service&#x27;;
import { Token } from &#x27;@app/_models&#x27;;
import { BehaviorSubject, Observable, Subject } from &#x27;rxjs&#x27;;

@Injectable({
  providedIn: &#x27;root&#x27;,
})
export class TokenService {
  registry: CICRegistry;
  tokenRegistry: TokenRegistry;
  tokens: Array&lt;Token&gt; &#x3D; [];
  private tokensList: BehaviorSubject&lt;Array&lt;Token&gt;&gt; &#x3D; new BehaviorSubject&lt;Array&lt;Token&gt;&gt;(
    this.tokens
  );
  tokensSubject: Observable&lt;Array&lt;Token&gt;&gt; &#x3D; this.tokensList.asObservable();
  load: BehaviorSubject&lt;any&gt; &#x3D; new BehaviorSubject&lt;any&gt;(false);

  constructor() {}

  async init(): Promise&lt;void&gt; {
    this.registry &#x3D; await RegistryService.getRegistry();
    this.tokenRegistry &#x3D; new TokenRegistry(
      await this.registry.getContractAddressByName(&#x27;TokenRegistry&#x27;)
    );
    this.load.next(true);
  }

  addToken(token: Token): void {
    const savedIndex &#x3D; this.tokens.findIndex((tk) &#x3D;&gt; tk.address &#x3D;&#x3D;&#x3D; token.address);
    if (savedIndex &#x3D;&#x3D;&#x3D; 0) {
      return;
    }
    if (savedIndex &gt; 0) {
      this.tokens.splice(savedIndex, 1);
    }
    this.tokens.unshift(token);
    this.tokensList.next(this.tokens);
  }

  async getTokens(): Promise&lt;void&gt; {
    const count: number &#x3D; await this.tokenRegistry.totalTokens();
    for (let i &#x3D; 0; i &lt; count; i++) {
      const token: Token &#x3D; await this.getTokenByAddress(await this.tokenRegistry.entry(i));
      this.addToken(token);
    }
  }

  async getTokenByAddress(address: string): Promise&lt;Token&gt; {
    const token: any &#x3D; {};
    const tokenContract &#x3D; await this.registry.addToken(address);
    token.address &#x3D; address;
    token.name &#x3D; await tokenContract.methods.name().call();
    token.symbol &#x3D; await tokenContract.methods.symbol().call();
    token.supply &#x3D; await tokenContract.methods.totalSupply().call();
    token.decimals &#x3D; await tokenContract.methods.decimals().call();
    return token;
  }

  async getTokenBySymbol(symbol: string): Promise&lt;Observable&lt;Token&gt;&gt; {
    const tokenSubject: Subject&lt;Token&gt; &#x3D; new Subject&lt;Token&gt;();
    await this.getTokens();
    this.tokensSubject.subscribe((tokens) &#x3D;&gt; {
      const queriedToken &#x3D; tokens.find((token) &#x3D;&gt; token.symbol &#x3D;&#x3D;&#x3D; symbol);
      tokenSubject.next(queriedToken);
    });
    return tokenSubject.asObservable();
  }

  async getTokenBalance(address: string): Promise&lt;(address: string) &#x3D;&gt; Promise&lt;number&gt;&gt; {
    const token &#x3D; await this.registry.addToken(await this.tokenRegistry.entry(0));
    return await token.methods.balanceOf(address).call();
  }

  async getTokenName(): Promise&lt;string&gt; {
    const token &#x3D; await this.registry.addToken(await this.tokenRegistry.entry(0));
    return await token.methods.name().call();
  }

  async getTokenSymbol(): Promise&lt;string&gt; {
    const token &#x3D; await this.registry.addToken(await this.tokenRegistry.entry(0));
    return await token.methods.symbol().call();
  }
}
</code></pre>
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