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_theme_toggle_vom09_24"><span></span></button><!--[--><!--[--><main class="_content_1gz79_1"><!--[--><h1>Smart Contracts</h1><article><div><p><!--[-->For common functions see <a href="/blockchain/common-typescript-examples" class=""><!--[-->Common typescript examples<!--]--></a>.<!--]--></p><h2 id="getting-smart-contract-instance"><a href="#getting-smart-contract-instance"><!--[-->Getting smart contract instance<!--]--></a></h2><p><!--[-->Useful for calling smart contract methods:<!--]--></p><div class="_wrapper_1pe7v_1"><button class="_language_1pe7v_9"><span class="_icon_1pe7v_5"><svg xmlns="http://www.w3.org/2000/svg" height="12" viewbox="0 0 24 24" width="12" fill="currentColor"><path d="M0 0h24v24H0z" fill="none"></path><path d="M16 1H4c-1.1 0-2 .9-2 2v14h2V3h12V1zm3 4H8c-1.1 0-2 .9-2 2v14c0 1.1.9 2 2 2h11c1.1 0 2-.9 2-2V7c0-1.1-.9-2-2-2zm0 16H8V7h11v14z"></path></svg></span><span>typescript</span></button><!--[--><pre><code><span class="line"><span class="ct-676ecc">import</span><span class="ct-9972dc"> { </span><span class="ct-b7f076">Contract</span><span class="ct-9972dc"> } </span><span class="ct-676ecc">from</span><span class="ct-9972dc"> </span><span class="ct-535336">'web3-eth-contract'</span><span class="ct-9972dc">;</span></span><span class="line"><span class="ct-676ecc">import</span><span class="ct-9972dc"> { </span><span class="ct-b7f076">web3</span><span class="ct-9972dc"> } </span><span class="ct-676ecc">from</span><span class="ct-9972dc"> </span><span class="ct-535336">'.'</span><span class="ct-9972dc">;</span></span><span class="line"></span><span class="line"><span class="ct-65d64d">const</span><span class="ct-ee4935"> </span><span class="ct-828ae0">getContract</span><span class="ct-ee4935"> </span><span class="ct-e3ba8f">=</span><span class="ct-ee4935"> (</span><span class="ct-117254">abi</span><span class="ct-e3ba8f">:</span><span class="ct-ee4935"> </span><span class="ct-e4d8a8">object</span><span class="ct-ee4935">, </span><span class="ct-117254">address</span><span class="ct-e3ba8f">?:</span><span class="ct-ee4935"> </span><span class="ct-e4d8a8">string</span><span class="ct-ee4935">)</span><span class="ct-e3ba8f">:</span><span class="ct-ee4935"> </span><span class="ct-65d64d">=></span><span class="ct-ee4935"> {</span></span><span class="line"><span class="ct-ee4935"> </span><span class="ct-65d64d">const</span><span class="ct-ee4935"> </span><span class="ct-82449a">abiFromJson</span><span class="ct-ee4935"> </span><span class="ct-e3ba8f">=</span><span class="ct-ee4935"> </span><span class="ct-8dc7af">JSON</span><span class="ct-ee4935">.</span><span class="ct-82449a">parse</span><span class="ct-ee4935">(</span></span><span class="line"><span class="ct-9972dc"> </span><span class="ct-676ecc">return</span><span class="ct-9972dc"> </span><span class="ct-676ecc">new</span><span class="ct-9972dc"> </span><span class="ct-b7f076">web3</span><span class="ct-9972dc">.</span><span class="ct-b7f076">eth</span><span class="ct-9972dc">.</span><span class="ct-b53e03">Contract</span><span class="ct-9972dc">(</span><span class="ct-b7f076">abiFromJson</span><span class="ct-9972dc">, </span><span class="ct-b7f076">address</span><span class="ct-9972dc">);</span></span><span class="line"><span class="ct-9972dc">};</span></span><span class="line"></span><span class="line"><span class="ct-676ecc">export</span><span class="ct-d74a13"> </span><span class="ct-676ecc">default</span><span class="ct-d74a13"> </span><span class="ct-b7f076">getContract</span><span class="ct-9972dc">;</span></span></code></pre><!--]--></div><h2 id="executing-contract-method"><a href="#executing-contract-method"><!--[-->Executing contract method<!--]--></a></h2><p><!--[-->Contract has <strong><!--[-->read<!--]--></strong> and <strong><!--[-->write<!--]--></strong> methods. To get a list of methods, you can paste contract address on <a href="https://etherscan.io/token/0xdac17f958d2ee523a2206206994597c13d831ec7#readContract" rel="nofollow" target="_blank"><!--[-->https://etherscan.io/ ETH<!--]--></a> or any other service.<!--]--></p><p><!--[--><strong><!--[-->Read<!--]--></strong> methods doesn't require spending <strong><!--[-->gas<!--]--></strong>. <strong><!--[-->Write<!--]--></strong> methods cost some amount of <strong><!--[-->gas<!--]--></strong>, hence they will be executed with confirmation from user.<!--]--></p><h3 id="example-for-metamask-without-private-key"><a href="#example-for-metamask-without-private-key"><!--[-->Example for #Metamask without private key<!--]--></a></h3><div class="_wrapper_1pe7v_1"><button class="_language_1pe7v_9"><span class="_icon_1pe7v_5"><svg xmlns="http://www.w3.org/2000/svg" height="12" viewbox="0 0 24 24" width="12" fill="currentColor"><path d="M0 0h24v24H0z" fill="none"></path><path d="M16 1H4c-1.1 0-2 .9-2 2v14h2V3h12V1zm3 4H8c-1.1 0-2 .9-2 2v14c0 1.1.9 2 2 2h11c1.1 0 2-.9 2-2V7c0-1.1-.9-2-2-2zm0 16H8V7h11v14z"></path></svg></span><span>typescript</span></button><!--[--><pre><code><span class="line"><span class="ct-776198">// see example below</span></span><span class="line"><span class="ct-676ecc">import</span><span class="ct-9972dc"> { </span><span class="ct-b7f076">getContract</span><span class="ct-9972dc"> } </span><span class="ct-676ecc">from</span><span class="ct-9972dc"> </span><span class="ct-535336">'.'</span><span class="ct-9972dc">;</span></span><span class="line"></span><span class="line"><span class="ct-776198">// ABI of contract</span></span><span class="line"><span class="ct-2264cd">const</span><span class="ct-9972dc"> </span><span class="ct-7e7b60">CONTRACT_ABI</span><span class="ct-9972dc"> </span><span class="ct-676ecc">=</span><span class="ct-9972dc"> { </span><span class="ct-776198">/* ... */</span><span class="ct-9972dc"> };</span></span><span class="line"><span class="ct-9972dc"> </span><span class="ct-776198">// address for contract</span></span><span class="line"><span class="ct-2264cd">const</span><span class="ct-9972dc"> </span><span class="ct-7e7b60">CONTRACT_ADDRESS</span><span class="ct-9972dc"> </span><span class="ct-676ecc">=</span><span class="ct-9972dc"> </span><span class="ct-535336">'0xdea164f67df4dbfe675d5271c9d404e0260f33bb'</span><span class="ct-9972dc">;</span></span><span class="line"></span><span class="line"><span class="ct-676ecc">export</span><span class="ct-9972dc"> </span><span class="ct-2264cd">const</span><span class="ct-9972dc"> </span><span class="ct-b53e03">executeContractMethod</span><span class="ct-9972dc"> </span><span class="ct-676ecc">=</span><span class="ct-9972dc"> </span><span class="ct-2264cd">async</span><span class="ct-9972dc"> ({}) </span><span class="ct-2264cd">=></span><span class="ct-9972dc"> {</span></span><span class="line"><span class="ct-9972dc"> </span><span class="ct-776198">// getting contract</span></span><span class="line"><span class="ct-9972dc"> </span><span class="ct-2264cd">const</span><span class="ct-9972dc"> </span><span class="ct-7e7b60">contract</span><span class="ct-9972dc"> </span><span class="ct-676ecc">=</span><span class="ct-9972dc"> </span><span class="ct-b53e03">getContract</span><span class="ct-9972dc">(</span><span class="ct-7e7b60">CONTRACT_ABI</span><span class="ct-9972dc">, </span><span class="ct-7e7b60">CONTRACT_ADDRESS</span><span class="ct-9972dc">);</span></span><span class="line"><span class="ct-9972dc"> </span></span><span class="line"><span class="ct-9972dc"> </span><span class="ct-776198">// Calling write method</span></span><span class="line"><span class="ct-9972dc"> </span><span class="ct-676ecc">try</span><span class="ct-9972dc"> {</span></span><span class="line"><span class="ct-9972dc"> </span><span class="ct-776198">// authorizing with Metamask</span></span><span class="line"><span class="ct-9972dc"> </span><span class="ct-676ecc">await</span><span class="ct-9972dc"> </span><span class="ct-b7f076">web3</span><span class="ct-9972dc">.</span><span class="ct-b7f076">currentProvider</span><span class="ct-9972dc">.</span><span class="ct-b53e03">request</span><span class="ct-9972dc">({ method: </span><span class="ct-535336">'eth_requestAccounts'</span><span class="ct-9972dc"> });</span></span><span class="line"><span class="ct-9972dc"> </span><span class="ct-776198">// getting wallet address</span></span><span class="line"><span class="ct-9972dc"> </span><span class="ct-2264cd">const</span><span class="ct-9972dc"> </span><span class="ct-7e7b60">addressUser</span><span class="ct-9972dc"> </span><span class="ct-676ecc">=</span><span class="ct-9972dc"> </span><span class="ct-b7f076">web3</span><span class="ct-9972dc">.</span><span class="ct-b7f076">currentProvider</span><span class="ct-9972dc">.</span><span class="ct-b7f076">selectedAddress</span><span class="ct-9972dc">;</span></span><span class="line"><span class="ct-9972dc"> </span><span class="ct-776198">// calling "store" store method for contract</span></span><span class="line"><span class="ct-9972dc"> </span><span class="ct-776198">// payload should include `from` address, that matches</span></span><span class="line"><span class="ct-9972dc"> </span><span class="ct-776198">// current user's wallet</span></span><span class="line"><span class="ct-9972dc"> </span><span class="ct-676ecc">await</span><span class="ct-9972dc"> </span><span class="ct-b7f076">contract</span><span class="ct-9972dc">.</span><span class="ct-b7f076">methods</span><span class="ct-9972dc">.</span><span class="ct-b53e03">store</span><span class="ct-9972dc">(</span><span class="ct-3a07b6">0</span><span class="ct-9972dc">, </span><span class="ct-535336">'Parameter'</span><span class="ct-9972dc">).</span><span class="ct-b53e03">send</span><span class="ct-9972dc">({</span></span><span class="line"><span class="ct-9972dc"> from: </span><span class="ct-b7f076">addressUser</span><span class="ct-9972dc">,</span></span><span class="line"><span class="ct-9972dc"> });</span></span><span class="line"><span class="ct-9972dc"> } </span><span class="ct-676ecc">catch</span><span class="ct-9972dc"> (</span><span class="ct-b7f076">e</span><span class="ct-9972dc">) {</span></span><span class="line"><span class="ct-9972dc"> </span><span class="ct-676ecc">throw</span><span class="ct-9972dc"> </span><span class="ct-676ecc">new</span><span class="ct-9972dc"> </span><span class="ct-0568c2">Error</span><span class="ct-9972dc">(</span><span class="ct-b7f076">e</span><span class="ct-9972dc">);</span></span><span class="line"><span class="ct-9972dc"> }</span></span><span class="line"><span class="ct-9972dc"> </span></span><span class="line"><span class="ct-9972dc"> </span><span class="ct-776198">// calling read method</span></span><span class="line"><span class="ct-9972dc"> </span><span class="ct-676ecc">try</span><span class="ct-9972dc"> {</span></span><span class="line"><span class="ct-9972dc"> </span><span class="ct-776198">// this method can return data</span></span><span class="line"><span class="ct-9972dc"> </span><span class="ct-2264cd">const</span><span class="ct-9972dc"> </span><span class="ct-7e7b60">result</span><span class="ct-9972dc"> </span><span class="ct-676ecc">=</span><span class="ct-9972dc"> </span><span class="ct-676ecc">await</span><span class="ct-9972dc"> </span><span class="ct-b7f076">contract</span><span class="ct-9972dc">.</span><span class="ct-b7f076">methods</span><span class="ct-9972dc">.</span><span class="ct-b53e03">retrieve</span><span class="ct-9972dc">().</span><span class="ct-b53e03">call</span><span class="ct-9972dc">();</span></span><span class="line"><span class="ct-9972dc"> } </span><span class="ct-676ecc">catch</span><span class="ct-9972dc"> (</span><span class="ct-b7f076">e</span><span class="ct-9972dc">) {</span></span><span class="line"><span class="ct-9972dc"> </span><span class="ct-676ecc">throw</span><span class="ct-9972dc"> </span><span class="ct-676ecc">new</span><span class="ct-9972dc"> </span><span class="ct-0568c2">Error</span><span class="ct-9972dc">(</span><span class="ct-b7f076">e</span><span class="ct-9972dc">);</span></span><span class="line"><span class="ct-9972dc"> }</span></span><span class="line"><span class="ct-9972dc">}</span></span></code></pre><!--]--></div><h3 id="nodejs-and-react-native-example"><a href="#nodejs-and-react-native-example"><!--[-->Node.js and React Native example<!--]--></a></h3><div class="_wrapper_1pe7v_1"><button class="_language_1pe7v_9"><span class="_icon_1pe7v_5"><svg xmlns="http://www.w3.org/2000/svg" height="12" viewbox="0 0 24 24" width="12" fill="currentColor"><path d="M0 0h24v24H0z" fill="none"></path><path d="M16 1H4c-1.1 0-2 .9-2 2v14h2V3h12V1zm3 4H8c-1.1 0-2 .9-2 2v14c0 1.1.9 2 2 2h11c1.1 0 2-.9 2-2V7c0-1.1-.9-2-2-2zm0 16H8V7h11v14z"></path></svg></span><span>typescript</span></button><!--[--><pre><code><span class="line"><span class="ct-776198">// see example below</span></span><span class="line"><span class="ct-676ecc">import</span><span class="ct-9972dc"> { </span><span class="ct-b7f076">getContract</span><span class="ct-9972dc"> } </span><span class="ct-676ecc">from</span><span class="ct-9972dc"> </span><span class="ct-535336">'.'</span><span class="ct-9972dc">;</span></span><span class="line"></span><span class="line"><span class="ct-776198">// ABI контракта</span></span><span class="line"><span class="ct-2264cd">const</span><span class="ct-9972dc"> </span><span class="ct-7e7b60">CONTRACT_ABI</span><span class="ct-9972dc"> </span><span class="ct-676ecc">=</span><span class="ct-9972dc"> { </span><span class="ct-776198">/* ... */</span><span class="ct-9972dc"> };</span></span><span class="line"><span class="ct-776198">// contract address</span></span><span class="line"><span class="ct-2264cd">const</span><span class="ct-9972dc"> </span><span class="ct-7e7b60">CONTRACT_ADDRESS</span><span class="ct-9972dc"> </span><span class="ct-676ecc">=</span><span class="ct-9972dc"> </span><span class="ct-535336">'0xdea164f67df4dbfe675d5271c9d404e0260f33bb'</span><span class="ct-9972dc">;</span></span><span class="line"><span class="ct-776198">// getting contract</span></span><span class="line"><span class="ct-2264cd">const</span><span class="ct-9972dc"> </span><span class="ct-7e7b60">contract</span><span class="ct-9972dc"> </span><span class="ct-676ecc">=</span><span class="ct-9972dc"> </span><span class="ct-b53e03">getContract</span><span class="ct-9972dc">(</span><span class="ct-7e7b60">CONTRACT_ABI</span><span class="ct-9972dc">, </span><span class="ct-7e7b60">CONTRACT_ADDRESS</span><span class="ct-9972dc">);</span></span><span class="line"><span class="ct-776198">// account's private key</span></span><span class="line"><span class="ct-2264cd">const</span><span class="ct-9972dc"> </span><span class="ct-7e7b60">privateKey</span><span class="ct-9972dc"> </span><span class="ct-676ecc">=</span><span class="ct-9972dc"> </span><span class="ct-535336">'...'</span><span class="ct-9972dc">;</span></span><span class="line"></span><span class="line"><span class="ct-776198">// write-methods requires private key</span></span><span class="line"><span class="ct-65d64d">const</span><span class="ct-ee4935"> </span><span class="ct-828ae0">executeContractMethod</span><span class="ct-ee4935"> </span><span class="ct-e3ba8f">=</span><span class="ct-ee4935"> </span><span class="ct-65d64d">async</span><span class="ct-ee4935"> (</span><span class="ct-117254">val</span><span class="ct-e3ba8f">:</span><span class="ct-ee4935"> </span><span class="ct-e4d8a8">number</span><span class="ct-ee4935">) </span><span class="ct-65d64d">=></span><span class="ct-ee4935"> {</span></span><span class="line"><span class="ct-9972dc"> </span><span class="ct-2264cd">const</span><span class="ct-9972dc"> </span><span class="ct-7e7b60">transaction</span><span class="ct-9972dc"> </span><span class="ct-676ecc">=</span><span class="ct-9972dc"> </span><span class="ct-b7f076">contract</span><span class="ct-9972dc">.</span><span class="ct-b7f076">methods</span><span class="ct-9972dc">.</span><span class="ct-b53e03">store</span><span class="ct-9972dc">(</span><span class="ct-b7f076">val</span><span class="ct-9972dc">);</span></span><span class="line"><span class="ct-9972dc"> </span><span class="ct-2264cd">const</span><span class="ct-9972dc"> </span><span class="ct-7e7b60">account</span><span class="ct-9972dc"> </span><span class="ct-676ecc">=</span><span class="ct-9972dc"> </span><span class="ct-b7f076">web3</span><span class="ct-9972dc">.</span><span class="ct-b7f076">eth</span><span class="ct-9972dc">.</span><span class="ct-b7f076">accounts</span><span class="ct-9972dc">.</span><span class="ct-b53e03">privateKeyToAccount</span><span class="ct-9972dc">(</span><span class="ct-b7f076">privateKey</span><span class="ct-9972dc">);</span></span><span class="line"><span class="ct-9972dc"> </span><span class="ct-2264cd">const</span><span class="ct-9972dc"> </span><span class="ct-7e7b60">options</span><span class="ct-9972dc"> </span><span class="ct-676ecc">=</span><span class="ct-9972dc"> {</span></span><span class="line"><span class="ct-9972dc"> to: </span><span class="ct-7e7b60">CONTRACT_ADDRESS</span><span class="ct-9972dc">,</span></span><span class="line"><span class="ct-9972dc"> data: </span><span class="ct-b7f076">transaction</span><span class="ct-9972dc">.</span><span class="ct-b53e03">encodeABI</span><span class="ct-9972dc">(),</span></span><span class="line"><span class="ct-9972dc"> gas: </span><span class="ct-676ecc">await</span><span class="ct-9972dc"> </span><span class="ct-b7f076">transaction</span><span class="ct-9972dc">.</span><span class="ct-b53e03">estimateGas</span><span class="ct-9972dc">({ from: </span><span class="ct-b7f076">account</span><span class="ct-9972dc">.</span><span class="ct-b7f076">address</span><span class="ct-9972dc"> }),</span></span><span class="line"><span class="ct-9972dc"> gasPrice: </span><span class="ct-676ecc">await</span><span class="ct-9972dc"> </span><span class="ct-b7f076">web3</span><span class="ct-9972dc">.</span><span class="ct-b7f076">eth</span><span class="ct-9972dc">.</span><span class="ct-b53e03">getGasPrice</span><span class="ct-9972dc">(),</span></span><span class="line"><span class="ct-9972dc"> };</span></span><span class="line"><span class="ct-9972dc"> </span><span class="ct-2264cd">const</span><span class="ct-9972dc"> </span><span class="ct-7e7b60">signed</span><span class="ct-9972dc"> </span><span class="ct-676ecc">=</span><span class="ct-9972dc"> </span><span class="ct-676ecc">await</span><span class="ct-9972dc"> </span><span class="ct-b7f076">web3</span><span class="ct-9972dc">.</span><span class="ct-b7f076">eth</span><span class="ct-9972dc">.</span><span class="ct-b7f076">accounts</span><span class="ct-9972dc">.</span><span class="ct-b53e03">signTransaction</span><span class="ct-9972dc">(</span></span><span class="line"><span class="ct-9972dc"> </span><span class="ct-b7f076">options</span><span class="ct-9972dc">,</span></span><span class="line"><span class="ct-9972dc"> </span><span class="ct-b7f076">privateKey</span><span class="ct-9972dc">,</span></span><span class="line"><span class="ct-9972dc"> );</span></span><span class="line"><span class="ct-9972dc"> </span><span class="ct-676ecc">await</span><span class="ct-9972dc"> </span><span class="ct-b7f076">web3</span><span class="ct-9972dc">.</span><span class="ct-b7f076">eth</span><span class="ct-9972dc">.</span><span class="ct-b53e03">sendSignedTransaction</span><span class="ct-9972dc">(</span><span class="ct-b7f076">signed</span><span class="ct-9972dc">.</span><span class="ct-b7f076">rawTransaction</span><span class="ct-676ecc">!</span><span class="ct-9972dc">);</span></span><span class="line"><span class="ct-9972dc">};</span></span></code></pre><!--]--></div><h3 id="calling-a-batch-of-contracts-methods"><a href="#calling-a-batch-of-contracts-methods"><!--[-->Calling a batch of contract's methods<!--]--></a></h3><p><!--[-->Function calls batch of requests, returning array of results. For example:<!--]--></p><div class="_wrapper_1pe7v_1"><button class="_language_1pe7v_9"><span class="_icon_1pe7v_5"><svg xmlns="http://www.w3.org/2000/svg" height="12" viewbox="0 0 24 24" width="12" fill="currentColor"><path d="M0 0h24v24H0z" fill="none"></path><path d="M16 1H4c-1.1 0-2 .9-2 2v14h2V3h12V1zm3 4H8c-1.1 0-2 .9-2 2v14c0 1.1.9 2 2 2h11c1.1 0 2-.9 2-2V7c0-1.1-.9-2-2-2zm0 16H8V7h11v14z"></path></svg></span><span>typescript</span></button><!--[--><pre><code><span class="line"><span class="ct-9972dc"> </span><span class="ct-2264cd">const</span><span class="ct-9972dc"> </span><span class="ct-7e7b60">requests</span><span class="ct-9972dc"> </span><span class="ct-676ecc">=</span><span class="ct-9972dc"> [</span></span><span class="line"><span class="ct-9972dc"> </span><span class="ct-b7f076">contract</span><span class="ct-9972dc">.</span><span class="ct-b7f076">method</span><span class="ct-9972dc">.</span><span class="ct-b53e03">balanceOf</span><span class="ct-9972dc">().</span><span class="ct-b7f076">call</span><span class="ct-9972dc">,</span></span><span class="line"><span class="ct-9972dc"> </span><span class="ct-b7f076">contract</span><span class="ct-9972dc">.</span><span class="ct-b7f076">method</span><span class="ct-9972dc">.</span><span class="ct-b53e03">getStaked</span><span class="ct-9972dc">().</span><span class="ct-b7f076">call</span></span><span class="line"><span class="ct-9972dc"> ]</span></span><span class="line"></span><span class="line"><span class="ct-9972dc"> </span><span class="ct-2264cd">const</span><span class="ct-9972dc"> </span><span class="ct-7e7b60">result</span><span class="ct-9972dc"> </span><span class="ct-676ecc">=</span><span class="ct-9972dc"> </span><span class="ct-676ecc">await</span><span class="ct-9972dc"> </span><span class="ct-b53e03">makeBatchRequest</span><span class="ct-9972dc">(</span><span class="ct-b7f076">request</span><span class="ct-9972dc">);</span></span></code></pre><!--]--></div><div class="_wrapper_1pe7v_1"><button class="_language_1pe7v_9"><span class="_icon_1pe7v_5"><svg xmlns="http://www.w3.org/2000/svg" height="12" viewbox="0 0 24 24" width="12" fill="currentColor"><path d="M0 0h24v24H0z" fill="none"></path><path d="M16 1H4c-1.1 0-2 .9-2 2v14h2V3h12V1zm3 4H8c-1.1 0-2 .9-2 2v14c0 1.1.9 2 2 2h11c1.1 0 2-.9 2-2V7c0-1.1-.9-2-2-2zm0 16H8V7h11v14z"></path></svg></span><span>typescript</span></button><!--[--><pre><code><span class="line"><span class="ct-2264cd">const</span><span class="ct-9972dc"> </span><span class="ct-7e7b60">web3</span><span class="ct-9972dc"> </span><span class="ct-676ecc">=</span><span class="ct-9972dc"> </span><span class="ct-676ecc">new</span><span class="ct-9972dc"> </span><span class="ct-b53e03">Web3</span><span class="ct-9972dc">(</span><span class="ct-b7f076">Web3</span><span class="ct-9972dc">.</span><span class="ct-b7f076">givenProvider</span><span class="ct-9972dc"> </span><span class="ct-676ecc">||</span><span class="ct-9972dc"> </span><span class="ct-7e7b60">PROVIDER_URL</span><span class="ct-9972dc">);</span></span><span class="line"></span><span class="line"><span class="ct-65d64d">const</span><span class="ct-ee4935"> </span><span class="ct-828ae0">makeBatchRequest</span><span class="ct-ee4935"> </span><span class="ct-e3ba8f">=</span><span class="ct-ee4935"> (</span><span class="ct-117254">calls</span><span class="ct-e3ba8f">:</span><span class="ct-ee4935"> </span><span class="ct-e4d8a8">any</span><span class="ct-ee4935">[]) </span><span class="ct-65d64d">=></span><span class="ct-ee4935"> {</span></span><span class="line"><span class="ct-9972dc"> </span><span class="ct-676ecc">try</span><span class="ct-9972dc"> {</span></span><span class="line"><span class="ct-9972dc"> </span><span class="ct-2264cd">const</span><span class="ct-9972dc"> </span><span class="ct-7e7b60">web3</span><span class="ct-9972dc"> </span><span class="ct-676ecc">=</span><span class="ct-9972dc"> </span><span class="ct-b53e03">getWeb3NoAccount</span><span class="ct-9972dc">();</span></span><span class="line"><span class="ct-9972dc"> </span><span class="ct-2264cd">const</span><span class="ct-9972dc"> </span><span class="ct-7e7b60">batch</span><span class="ct-9972dc"> </span><span class="ct-676ecc">=</span><span class="ct-9972dc"> </span><span class="ct-676ecc">new</span><span class="ct-9972dc"> </span><span class="ct-b7f076">web3</span><span class="ct-9972dc">.</span><span class="ct-b53e03">BatchRequest</span><span class="ct-9972dc">();</span></span><span class="line"></span><span class="line"><span class="ct-9972dc"> </span><span class="ct-2264cd">const</span><span class="ct-9972dc"> </span><span class="ct-7e7b60">promises</span><span class="ct-9972dc"> </span><span class="ct-676ecc">=</span><span class="ct-9972dc"> </span><span class="ct-b7f076">calls</span><span class="ct-9972dc">.</span><span class="ct-b53e03">map</span><span class="ct-2264cd">=></span><span class="ct-9972dc"> {</span></span><span class="line"><span class="ct-ee4935"> </span><span class="ct-e3ba8f">return</span><span class="ct-ee4935"> </span><span class="ct-e3ba8f">new</span><span class="ct-ee4935"> </span><span class="ct-e4d8a8">Promise</span><span class="ct-ee4935">((</span><span class="ct-117254">resolve</span><span class="ct-ee4935">, </span><span class="ct-117254">reject</span><span class="ct-ee4935">) </span><span class="ct-65d64d">=></span><span class="ct-ee4935"> {</span></span><span class="line"><span class="ct-9972dc"> </span><span class="ct-b7f076">batch</span><span class="ct-9972dc">.</span><span class="ct-b53e03">add</span><span class="ct-9972dc">(</span></span><span class="line"></span><span class="line"><span class="ct-9972dc"> </span><span class="ct-676ecc">if</span><span class="ct-9972dc"> (</span><span class="ct-b7f076">err</span><span class="ct-9972dc">) {</span></span><span class="line"><span class="ct-9972dc"> </span><span class="ct-b53e03">reject</span><span class="ct-9972dc">(</span><span class="ct-b7f076">err</span><span class="ct-9972dc">);</span></span><span class="line"><span class="ct-9972dc"> } </span><span class="ct-676ecc">else</span><span class="ct-9972dc"> {</span></span><span class="line"><span class="ct-9972dc"> </span><span class="ct-b53e03">resolve</span><span class="ct-9972dc">(</span><span class="ct-b7f076">result</span><span class="ct-9972dc">);</span></span><span class="line"><span class="ct-9972dc"> }</span></span><span class="line"><span class="ct-9972dc"> })</span></span><span class="line"><span class="ct-9972dc"> );</span></span><span class="line"><span class="ct-9972dc"> });</span></span><span class="line"><span class="ct-9972dc"> });</span></span><span class="line"></span><span class="line"><span class="ct-9972dc"> </span><span class="ct-b7f076">batch</span><span class="ct-9972dc">.</span><span class="ct-b53e03">execute</span><span class="ct-9972dc">();</span></span><span class="line"></span><span class="line"><span class="ct-9972dc"> </span><span class="ct-676ecc">return</span><span class="ct-9972dc"> </span><span class="ct-0568c2">Promise</span><span class="ct-9972dc">.</span><span class="ct-b53e03">all</span><span class="ct-9972dc">(</span><span class="ct-b7f076">promises</span><span class="ct-9972dc">);</span></span><span class="line"><span class="ct-9972dc"> } </span><span class="ct-676ecc">catch</span><span class="ct-9972dc"> {</span></span><span class="line"><span class="ct-9972dc"> </span><span class="ct-676ecc">return</span><span class="ct-9972dc"> </span><span class="ct-26c60e">null</span><span class="ct-9972dc">;</span></span><span class="line"><span class="ct-9972dc"> }</span></span><span class="line"><span class="ct-9972dc">};</span></span><span class="line"></span><span class="line"><span class="ct-676ecc">export</span><span class="ct-d74a13"> </span><span class="ct-676ecc">default</span><span class="ct-d74a13"> </span><span class="ct-b7f076">makeBatchRequest</span><span class="ct-9972dc">;</span></span></code></pre><!--]--></div><h2 id="subscribing-to-smart-contract-events"><a href="#subscribing-to-smart-contract-events"><!--[-->Subscribing to smart contract events<!--]--></a></h2><p><!--[-->There're different ways to subscribe for contract events. For all of them you will need following variables:<!--]--></p><div class="_wrapper_1pe7v_1"><button class="_language_1pe7v_9"><span class="_icon_1pe7v_5"><svg xmlns="http://www.w3.org/2000/svg" height="12" viewbox="0 0 24 24" width="12" fill="currentColor"><path d="M0 0h24v24H0z" fill="none"></path><path d="M16 1H4c-1.1 0-2 .9-2 2v14h2V3h12V1zm3 4H8c-1.1 0-2 .9-2 2v14c0 1.1.9 2 2 2h11c1.1 0 2-.9 2-2V7c0-1.1-.9-2-2-2zm0 16H8V7h11v14z"></path></svg></span><span>typescript</span></button><!--[--><pre><code><span class="line"><span class="ct-9972dc"> </span><span class="ct-676ecc">import</span><span class="ct-9972dc"> </span><span class="ct-b7f076">Web3</span><span class="ct-9972dc"> </span><span class="ct-676ecc">from</span><span class="ct-9972dc"> </span><span class="ct-535336">'web3'</span><span class="ct-9972dc">;</span></span><span class="line"><span class="ct-9972dc"> </span><span class="ct-2264cd">const</span><span class="ct-9972dc"> </span><span class="ct-7e7b60">web3</span><span class="ct-9972dc"> </span><span class="ct-676ecc">=</span><span class="ct-9972dc"> </span><span class="ct-676ecc">new</span><span class="ct-9972dc"> </span><span class="ct-b53e03">Web3</span><span class="ct-9972dc">(</span><span class="ct-535336">'YOUR_RPC_ENDPOINT_HERE'</span><span class="ct-9972dc">);</span></span><span class="line"><span class="ct-9972dc"> </span><span class="ct-2264cd">const</span><span class="ct-9972dc"> </span><span class="ct-7e7b60">ABI</span><span class="ct-9972dc"> </span><span class="ct-676ecc">=</span><span class="ct-9972dc"> </span><span class="ct-535336">'YOUR ABI HERE'</span><span class="ct-9972dc">;</span></span><span class="line"><span class="ct-9972dc"> </span><span class="ct-2264cd">const</span><span class="ct-9972dc"> </span><span class="ct-7e7b60">CONTRACT_ADDRESS</span><span class="ct-9972dc"> </span><span class="ct-676ecc">=</span><span class="ct-9972dc"> </span><span class="ct-535336">'YOUR CONTRACT ADDRESS HERE'</span><span class="ct-9972dc">;</span></span><span class="line"><span class="ct-9972dc"> </span><span class="ct-2264cd">const</span><span class="ct-9972dc"> </span><span class="ct-7e7b60">myContract</span><span class="ct-9972dc"> </span><span class="ct-676ecc">=</span><span class="ct-9972dc"> </span><span class="ct-676ecc">new</span><span class="ct-9972dc"> </span><span class="ct-b7f076">Web3</span><span class="ct-9972dc">.</span><span class="ct-b53e03">Contract</span><span class="ct-9972dc">(</span><span class="ct-7e7b60">ABI</span><span class="ct-9972dc">, </span><span class="ct-7e7b60">CONTRACT_ADDRESS</span><span class="ct-9972dc">);</span></span></code></pre><!--]--></div><h3 id="by-accessing-contractevents"><a href="#by-accessing-contractevents"><!--[-->By accessing contract.events<!--]--></a></h3><div class="_wrapper_1pe7v_1"><button class="_language_1pe7v_9"><span class="_icon_1pe7v_5"><svg xmlns="http://www.w3.org/2000/svg" height="12" viewbox="0 0 24 24" width="12" fill="currentColor"><path d="M0 0h24v24H0z" fill="none"></path><path d="M16 1H4c-1.1 0-2 .9-2 2v14h2V3h12V1zm3 4H8c-1.1 0-2 .9-2 2v14c0 1.1.9 2 2 2h11c1.1 0 2-.9 2-2V7c0-1.1-.9-2-2-2zm0 16H8V7h11v14z"></path></svg></span><span>typescript</span></button><!--[--><pre><code><span class="line"><span class="ct-b7f076">referralProgramContract</span><span class="ct-9972dc">.</span><span class="ct-b7f076">events</span></span><span class="line"><span class="ct-9972dc"> .</span><span class="ct-b53e03">RegisterUser</span><span class="ct-9972dc">()</span></span><span class="line"><span class="ct-ee4935"> .</span><span class="ct-828ae0">on</span><span class="ct-ee4935">(</span><span class="ct-722614">'connected'</span><span class="ct-ee4935">, (</span><span class="ct-117254">subscriptionId</span><span class="ct-e3ba8f">:</span><span class="ct-ee4935"> </span><span class="ct-e4d8a8">string</span><span class="ct-ee4935">) </span><span class="ct-65d64d">=></span><span class="ct-ee4935"> {</span></span><span class="line"><span class="ct-9972dc"> </span><span class="ct-b7f076">console</span><span class="ct-9972dc">.</span><span class="ct-b53e03">log</span><span class="ct-9972dc">(</span><span class="ct-535336">`| UserRegistered | events | ${</span><span class="ct-b7f076">subscriptionId</span><span class="ct-535336">}`</span><span class="ct-9972dc">);</span></span><span class="line"><span class="ct-9972dc"> })</span></span><span class="line"><span class="ct-9972dc"> .</span><span class="ct-b53e03">on</span><span class="ct-9972dc">(</span></span><span class="line"><span class="ct-9972dc"> </span><span class="ct-535336">'data'</span><span class="ct-9972dc">,</span></span><span class="line"><span class="ct-ee4935"> </span><span class="ct-65d64d">async</span><span class="ct-ee4935"> (</span><span class="ct-117254">event</span><span class="ct-e3ba8f">:</span><span class="ct-ee4935"> {</span></span><span class="line"><span class="ct-ee4935"> </span><span class="ct-117254">removed</span><span class="ct-e3ba8f">:</span><span class="ct-ee4935"> </span><span class="ct-e4d8a8">boolean</span><span class="ct-ee4935">;</span></span><span class="line"><span class="ct-ee4935"> </span><span class="ct-117254">returnValues</span><span class="ct-e3ba8f">:</span><span class="ct-ee4935"> </span><span class="ct-f964a1">RegisterUserResponseInterface</span><span class="ct-ee4935">;</span></span><span class="line"><span class="ct-9972dc"> }) </span><span class="ct-2264cd">=></span><span class="ct-9972dc"> {</span></span><span class="line"><span class="ct-9972dc"> </span><span class="ct-676ecc">try</span><span class="ct-9972dc"> {</span></span><span class="line"><span class="ct-9972dc"> </span><span class="ct-676ecc">if</span><span class="ct-9972dc"> (</span><span class="ct-b7f076">event</span><span class="ct-9972dc">.</span><span class="ct-b7f076">removed</span><span class="ct-9972dc">) {</span></span><span class="line"><span class="ct-9972dc"> </span><span class="ct-676ecc">return</span><span class="ct-9972dc">;</span></span><span class="line"><span class="ct-9972dc"> }</span></span><span class="line"><span class="ct-9972dc"> </span><span class="ct-2264cd">const</span><span class="ct-9972dc"> { </span><span class="ct-7e7b60">user</span><span class="ct-9972dc">, </span><span class="ct-7e7b60">referrer</span><span class="ct-9972dc"> } </span><span class="ct-676ecc">=</span><span class="ct-9972dc"> </span><span class="ct-b7f076">event</span><span class="ct-9972dc">.</span><span class="ct-b7f076">returnValues</span><span class="ct-9972dc">;</span></span><span class="line"><span class="ct-9972dc"> </span><span class="ct-b7f076">console</span><span class="ct-9972dc">.</span><span class="ct-b53e03">log</span><span class="ct-9972dc">(</span><span class="ct-b7f076">user</span><span class="ct-9972dc">, </span><span class="ct-b7f076">referrer</span><span class="ct-9972dc">);</span></span><span class="line"><span class="ct-9972dc"> } </span><span class="ct-676ecc">catch</span><span class="ct-9972dc"> (</span><span class="ct-b7f076">e</span><span class="ct-9972dc">) {</span></span><span class="line"><span class="ct-9972dc"> </span><span class="ct-b7f076">console</span><span class="ct-9972dc">.</span><span class="ct-b53e03">log</span><span class="ct-9972dc">(</span><span class="ct-535336">`| ONCE | ${</span><span class="ct-b7f076">e</span><span class="ct-535336">}`</span><span class="ct-9972dc">);</span></span><span class="line"><span class="ct-9972dc"> }</span></span><span class="line"><span class="ct-9972dc"> },</span></span><span class="line"><span class="ct-9972dc"> )</span></span><span class="line"><span class="ct-ee4935"> .</span><span class="ct-828ae0">on</span><span class="ct-ee4935">(</span><span class="ct-722614">'error'</span><span class="ct-ee4935">, (</span><span class="ct-117254">error</span><span class="ct-e3ba8f">:</span><span class="ct-ee4935"> </span><span class="ct-f964a1">ErrnoException</span><span class="ct-ee4935">) </span><span class="ct-65d64d">=></span><span class="ct-ee4935"> {</span></span><span class="line"><span class="ct-9972dc"> </span><span class="ct-b7f076">console</span><span class="ct-9972dc">.</span><span class="ct-b53e03">log</span><span class="ct-9972dc">(</span><span class="ct-b7f076">error</span><span class="ct-9972dc">);</span></span><span class="line"><span class="ct-9972dc"> });</span></span></code></pre><!--]--></div><h3 id="with-filtering"><a href="#with-filtering"><!--[-->With filtering<!--]--></a></h3><p><!--[-->We're listening to <code><!--[-->Transfer<!--]--></code> event here:<!--]--></p><div class="_wrapper_1pe7v_1"><button class="_language_1pe7v_9"><span class="_icon_1pe7v_5"><svg xmlns="http://www.w3.org/2000/svg" height="12" viewbox="0 0 24 24" width="12" fill="currentColor"><path d="M0 0h24v24H0z" fill="none"></path><path d="M16 1H4c-1.1 0-2 .9-2 2v14h2V3h12V1zm3 4H8c-1.1 0-2 .9-2 2v14c0 1.1.9 2 2 2h11c1.1 0 2-.9 2-2V7c0-1.1-.9-2-2-2zm0 16H8V7h11v14z"></path></svg></span><span>typescript</span></button><!--[--><pre><code><span class="line"><span class="ct-9972dc"> </span><span class="ct-2264cd">let</span><span class="ct-9972dc"> </span><span class="ct-b7f076">options</span><span class="ct-9972dc"> </span><span class="ct-676ecc">=</span><span class="ct-9972dc"> {</span></span><span class="line"><span class="ct-9972dc"> filter: {</span></span><span class="line"><span class="ct-9972dc"> value: [],</span></span><span class="line"><span class="ct-9972dc"> },</span></span><span class="line"><span class="ct-9972dc"> fromBlock: </span><span class="ct-3a07b6">0</span></span><span class="line"><span class="ct-9972dc"> };</span></span><span class="line"></span><span class="line"><span class="ct-9972dc"> </span><span class="ct-b7f076">myContract</span><span class="ct-9972dc">.</span><span class="ct-b7f076">events</span><span class="ct-9972dc">.</span><span class="ct-b53e03">Transfer</span><span class="ct-9972dc">(</span><span class="ct-b7f076">options</span><span class="ct-9972dc">)</span></span><span class="line"><span class="ct-9972dc"> .</span><span class="ct-b53e03">on</span><span class="ct-9972dc">(</span><span class="ct-535336">'data'</span><span class="ct-9972dc"> </span><span class="ct-b53e03">log</span><span class="ct-9972dc">(</span><span class="ct-b7f076">event</span><span class="ct-9972dc">))</span></span><span class="line"><span class="ct-9972dc"> .</span><span class="ct-b53e03">on</span><span class="ct-9972dc">(</span><span class="ct-535336">'changed'</span><span class="ct-9972dc"> </span><span class="ct-b53e03">log</span><span class="ct-9972dc">(</span><span class="ct-b7f076">changed</span><span class="ct-9972dc">))</span></span><span class="line"><span class="ct-9972dc"> .</span><span class="ct-b53e03">on</span><span class="ct-9972dc">(</span><span class="ct-535336">'error'</span><span class="ct-9972dc"> </span></span><span class="line"><span class="ct-9972dc"> .</span><span class="ct-b53e03">on</span><span class="ct-9972dc">(</span><span class="ct-535336">'connected'</span><span class="ct-9972dc"> </span><span class="ct-b53e03">log</span><span class="ct-9972dc">(</span><span class="ct-b7f076">str</span><span class="ct-9972dc">))</span></span></code></pre><!--]--></div><h3 id="common-subscribe-method"><a href="#common-subscribe-method"><!--[-->Common Subscribe method<!--]--></a></h3><p><!--[-->Filtering options can also be specified:<!--]--></p><div class="_wrapper_1pe7v_1"><button class="_language_1pe7v_9"><span class="_icon_1pe7v_5"><svg xmlns="http://www.w3.org/2000/svg" height="12" viewbox="0 0 24 24" width="12" fill="currentColor"><path d="M0 0h24v24H0z" fill="none"></path><path d="M16 1H4c-1.1 0-2 .9-2 2v14h2V3h12V1zm3 4H8c-1.1 0-2 .9-2 2v14c0 1.1.9 2 2 2h11c1.1 0 2-.9 2-2V7c0-1.1-.9-2-2-2zm0 16H8V7h11v14z"></path></svg></span><span>typescript</span></button><!--[--><pre><code><span class="line"><span class="ct-9972dc"> </span><span class="ct-2264cd">let</span><span class="ct-9972dc"> </span><span class="ct-b7f076">options</span><span class="ct-9972dc"> </span><span class="ct-676ecc">=</span><span class="ct-9972dc"> {</span></span><span class="line"><span class="ct-9972dc"> fromBlock: </span><span class="ct-3a07b6">0</span><span class="ct-9972dc">,</span></span><span class="line"><span class="ct-9972dc"> address: [</span><span class="ct-535336">'address-1'</span><span class="ct-9972dc">, </span><span class="ct-535336">'address-2'</span><span class="ct-9972dc">], </span><span class="ct-776198">//Only get events from specific addresses</span></span><span class="line"><span class="ct-9972dc"> topics: [] </span><span class="ct-776198">//What topics to subscribe to</span></span><span class="line"><span class="ct-9972dc"> };</span></span><span class="line"></span><span class="line"><span class="ct-9972dc"> </span><span class="ct-2264cd">let</span><span class="ct-9972dc"> </span><span class="ct-b7f076">subscription</span><span class="ct-9972dc"> </span><span class="ct-676ecc">=</span><span class="ct-9972dc"> (</span><span class="ct-535336">'logs'</span><span class="ct-9972dc">, </span><span class="ct-b7f076">options</span></span><span class="line"><span class="ct-9972dc"> </span><span class="ct-676ecc">if</span><span class="ct-9972dc"> (</span><span class="ct-676ecc">!</span><span class="ct-b7f076">err</span><span class="ct-9972dc">)</span></span><span class="line"><span class="ct-9972dc"> </span><span class="ct-b7f076">console</span><span class="ct-9972dc">.</span><span class="ct-b53e03">log</span><span class="ct-9972dc">(</span><span class="ct-b7f076">event</span><span class="ct-9972dc">)</span></span><span class="line"><span class="ct-9972dc"> });</span></span><span class="line"></span><span class="line"><span class="ct-9972dc"> </span><span class="ct-b7f076">subscription</span><span class="ct-9972dc">.</span><span class="ct-b53e03">on</span><span class="ct-9972dc">(</span><span class="ct-535336">'data'</span><span class="ct-2264cd">=></span><span class="ct-9972dc"> </span><span class="ct-b7f076">console</span><span class="ct-9972dc">.</span><span class="ct-b53e03">log</span><span class="ct-9972dc">(</span><span class="ct-b7f076">event</span><span class="ct-9972dc">))</span></span><span class="line"><span class="ct-9972dc"> </span><span class="ct-b7f076">subscription</span><span class="ct-9972dc">.</span><span class="ct-b53e03">on</span><span class="ct-9972dc">(</span><span class="ct-535336">'changed'</span><span class="ct-2264cd">=></span><span class="ct-9972dc"> </span><span class="ct-b7f076">console</span><span class="ct-9972dc">.</span><span class="ct-b53e03">log</span><span class="ct-9972dc">(</span><span class="ct-b7f076">changed</span><span class="ct-9972dc">))</span></span><span class="line"><span class="ct-9972dc"> </span><span class="ct-b7f076">subscription</span><span class="ct-9972dc">.</span><span class="ct-b53e03">on</span><span class="ct-9972dc">(</span><span class="ct-535336">'error'</span><span class="ct-2264cd">=></span><span class="ct-9972dc"> { </span><span class="ct-676ecc">throw</span><span class="ct-9972dc"> </span><span class="ct-b7f076">err</span><span class="ct-9972dc"> })</span></span><span class="line"><span class="ct-9972dc"> </span><span class="ct-b7f076">subscription</span><span class="ct-9972dc">.</span><span class="ct-b53e03">on</span><span class="ct-9972dc">(</span><span class="ct-535336">'connected'</span><span class="ct-2264cd">=></span><span class="ct-9972dc"> </span><span class="ct-b7f076">console</span><span class="ct-9972dc">.</span><span class="ct-b53e03">log</span><span class="ct-9972dc">(</span><span class="ct-b7f076">nr</span><span class="ct-9972dc">))</span></span></code></pre><!--]--></div><h3 id="getting-event-history"><a href="#getting-event-history"><!--[-->Getting event history<!--]--></a></h3><p><!--[-->Getting history for <code><!--[-->Transfer<!--]--></code> events for specific values. More info can be found <a href="https://web3js.readthedocs.io/en/v1.2.11/web3-eth-subscribe.html#" rel="nofollow" target="_blank"><!--[-->here<!--]--></a><!--]--></p><div class="_wrapper_1pe7v_1"><button class="_language_1pe7v_9"><span class="_icon_1pe7v_5"><svg xmlns="http://www.w3.org/2000/svg" height="12" viewbox="0 0 24 24" width="12" fill="currentColor"><path d="M0 0h24v24H0z" fill="none"></path><path d="M16 1H4c-1.1 0-2 .9-2 2v14h2V3h12V1zm3 4H8c-1.1 0-2 .9-2 2v14c0 1.1.9 2 2 2h11c1.1 0 2-.9 2-2V7c0-1.1-.9-2-2-2zm0 16H8V7h11v14z"></path></svg></span><span>typescript</span></button><!--[--><pre><code><span class="line"><span class="ct-9972dc"> </span><span class="ct-776198">//example options(optional)</span></span><span class="line"><span class="ct-9972dc"> </span><span class="ct-2264cd">let</span><span class="ct-9972dc"> </span><span class="ct-b7f076">options</span><span class="ct-9972dc"> </span><span class="ct-676ecc">=</span><span class="ct-9972dc"> {</span></span><span class="line"><span class="ct-9972dc"> filter: {</span></span><span class="line"><span class="ct-9972dc"> </span><span class="ct-776198">// only get events where transfer value was 1000 or 1337</span></span><span class="line"><span class="ct-9972dc"> value: [</span><span class="ct-535336">'1000'</span><span class="ct-9972dc">, </span><span class="ct-535336">'1337'</span><span class="ct-9972dc">] </span></span><span class="line"><span class="ct-9972dc"> },</span></span><span class="line"><span class="ct-9972dc"> </span><span class="ct-776198">// number | "earliest" | "pending" | "latest"</span></span><span class="line"><span class="ct-9972dc"> fromBlock: </span><span class="ct-3a07b6">0</span><span class="ct-9972dc">, </span></span><span class="line"><span class="ct-9972dc"> toBlock: </span><span class="ct-535336">'latest'</span></span><span class="line"><span class="ct-9972dc"> };</span></span><span class="line"></span><span class="line"><span class="ct-9972dc"> </span><span class="ct-b7f076">myContract</span><span class="ct-9972dc">.</span><span class="ct-b53e03">getPastEvents</span><span class="ct-9972dc">(</span><span class="ct-535336">'Transfer'</span><span class="ct-9972dc">, </span><span class="ct-b7f076">options</span><span class="ct-9972dc">)</span></span><span class="line"><span class="ct-9972dc"> .</span><span class="ct-b53e03">then</span><span class="ct-9972dc"> </span><span class="ct-b53e03">log</span><span class="ct-9972dc">(</span><span class="ct-b7f076">results</span><span class="ct-9972dc">))</span></span><span class="line"><span class="ct-9972dc"> .</span><span class="ct-b53e03">catch</span><span class="ct-9972dc"> </span></span></code></pre><!--]--></div><style>.ct-f964a1{color:#FFA657}.ct-722614{color:#A5D6FF}.ct-26c60e{color:#79C0FF}.ct-0568c2{color:#79C0FF}.ct-3a07b6{color:#79C0FF}.ct-7e7b60{color:#79C0FF}.ct-2264cd{color:#FF7B72}.ct-776198{color:#8B949E}.ct-d74a13{color:#FFA657}.ct-b53e03{color:#D2A8FF}.ct-8dc7af{color:#79C0FF}.ct-82449a{color:#79C0FF}.ct-e4d8a8{color:#79C0FF}.ct-117254{color:#FFA657}.ct-e3ba8f{color:#FF7B72}.ct-828ae0{color:#D2A8FF}.ct-ee4935{color:#C9D1D9}.ct-65d64d{color:#FF7B72}.ct-535336{color:#A5D6FF}.ct-b7f076{color:#C9D1D9}.ct-9972dc{color:#C9D1D9}.ct-676ecc{color:#FF7B72}.light .ct-676ecc{color:#859900}.light .ct-9972dc{color:#657B83}.light .ct-b7f076{color:#268BD2}.light .ct-535336{color:#2AA198}.light .ct-65d64d{color:#073642}.light .ct-ee4935{color:#657B83}.light .ct-828ae0{color:#268BD2}.light .ct-e3ba8f{color:#859900}.light .ct-117254{color:#657B83}.light .ct-e4d8a8{color:#859900}.light .ct-82449a{color:#268BD2}.light .ct-8dc7af{color:#657B83}.light .ct-b53e03{color:#268BD2}.light .ct-d74a13{color:#657B83}.light .ct-776198{color:#93A1A1}.light .ct-2264cd{color:#073642}.light .ct-7e7b60{color:#268BD2}.light .ct-3a07b6{color:#D33682}.light .ct-0568c2{color:#859900}.light .ct-26c60e{color:#B58900}.light .ct-722614{color:#2AA198}.light .ct-f964a1{color:#268BD2}</style></div></article><!--]--></main><!--]--><!--]--></div><footer class="_footer_ogxvf_1 _footer_vom09_18 _footer_vom09_18"><div>btw, have a nice day</div><div class="_filler_ogxvf_9"></div><div> (2018 - 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