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32 lines
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<!DOCTYPE html>
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<title>Utilities</title>
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<div class="logo"><a href="/v5/"><div class="image"></div><div class="name">ethers</div><div class="version">v5.0-beta</div></a></div>
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<div class="toc"><div>
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<div class="link title"><a href="/">Documentation</a></div><div class="base show link depth-1"><a href="/v5/getting-started/">Getting Started</a></div><div class="base show link depth-1"><a href="/v5/concepts/">Ethereum Basics</a></div><div class="hide link depth-2"><a href="/v5/concepts/events/">Events</a></div><div class="hide link depth-2"><a href="/v5/concepts/gas/">Gas</a></div><div class="hide link depth-2"><a href="/v5/concepts/security/">Security</a></div><div class="base ancestor show link depth-1"><a href="/v5/api/">Application Programming Interface</a></div><div class="show link depth-2"><a href="/v5/api/contract/">Contract Interaction</a></div><div class="hide link depth-3"><a href="/v5/api/contract/contract/">Contract</a></div><div class="hide link depth-3"><a href="/v5/api/contract/contract-factory/">ContractFactory</a></div><div class="hide link depth-3"><a href="/v5/api/contract/example/">Example: ERC-20 Contract</a></div><div class="show link depth-2"><a href="/v5/api/signer/">Signers</a></div><div class="show link depth-2"><a href="/v5/api/providers/">Providers</a></div><div class="hide link depth-3"><a href="/v5/api/providers/provider/">Provider</a></div><div class="hide link depth-3"><a href="/v5/api/providers/jsonrpc-provider/">JsonRpcProvider</a></div><div class="hide link depth-3"><a href="/v5/api/providers/api-providers/">API Providers</a></div><div class="hide link depth-3"><a href="/v5/api/providers/other/">Other Providers</a></div><div class="hide link depth-3"><a href="/v5/api/providers/types/">Types</a></div><div class="myself ancestor ancestor show link depth-2"><a href="/v5/api/utils/">Utilities</a></div><div class="child show link depth-3"><a href="/v5/api/utils/abi/">Application Binary Interface</a></div><div class="hide link depth-4"><a href="/v5/api/utils/abi/interface/">Interface</a></div><div class="hide link depth-4"><a href="/v5/api/utils/abi/fragments/">Fragments</a></div><div class="child show link depth-3"><a href="/v5/api/utils/address/">Addresses</a></div><div class="child show link depth-3"><a href="/v5/api/utils/bignumber/">BigNumber</a></div><div class="child show link depth-3"><a href="/v5/api/utils/bytes/">Byte Manipulation</a></div><div class="child show link depth-3"><a href="/v5/api/utils/constants/">Constants</a></div><div class="child show link depth-3"><a href="/v5/api/utils/display-logic/">Display Logic and Input</a></div><div class="child show link depth-3"><a href="/v5/api/utils/encoding/">Encoding Utilities</a></div><div class="child show link depth-3"><a href="/v5/api/utils/fixednumber/">FixedNumber</a></div><div class="child show link depth-3"><a href="/v5/api/utils/hashing/">Hashing Algorithms</a></div><div class="child show link depth-3"><a href="/v5/api/utils/hdnode/">HD Wallet</a></div><div class="child show link depth-3"><a href="/v5/api/utils/logger/">Logging</a></div><div class="child show link depth-3"><a href="/v5/api/utils/properties/">Property Utilities</a></div><div class="child show link depth-3"><a href="/v5/api/utils/signing-key/">Signing Key</a></div><div class="child show link depth-3"><a href="/v5/api/utils/strings/">Strings</a></div><div class="child show link depth-3"><a href="/v5/api/utils/transactions/">Transactions</a></div><div class="child show link depth-3"><a href="/v5/api/utils/web/">Web Utilities</a></div><div class="child show link depth-3"><a href="/v5/api/utils/wordlists/">Wordlists</a></div><div class="show link depth-2"><a href="/v5/api/other/">Other Libraries</a></div><div class="hide link depth-3"><a href="/v5/api/other/assembly/">Assembly</a></div><div class="hide link depth-4"><a href="/v5/api/other/assembly/dialect/">Ethers ASM Dialect</a></div><div class="hide link depth-4"><a href="/v5/api/other/assembly/api/">Utilities</a></div><div class="hide link depth-4"><a href="/v5/api/other/assembly/ast/">Abstract Syntax Tree</a></div><div class="hide link depth-3"><a href="/v5/api/other/hardware/">Hardware Wallets</a></div><div class="show link depth-2"><a href="/v5/api/experimental/">Experimental</a></div><div class="b
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<div class="breadcrumbs"><a href="/v5/">Documentation</a> » <a href="/v5/api/">API</a> » <span class="current">Utilities</span></div>
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<a name="utilities"></a><h1 class="show-anchors"><div>Utilities<div class="anchors"><a class="self" href="/v5/api/utils/#utilities"></a></div></div></h1><p>These utilities are used extensively within the library, but are also quite useful for application developers.</p>
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<div class="toc"><div style="padding-left: 0px"><span class="bullet">•</span><a href="/v5/api/utils/abi/">Application Binary Interface</a></div><div style="padding-left: 28px"><span class="bullet">•</span><a href="/v5/api/utils/abi/interface/">Interface</a></div><div style="padding-left: 56px"><span class="bullet">•</span><a href="/v5/api/utils/abi/interface/#Interface--creating-instances">Creating Instances</a></div><div style="padding-left: 56px"><span class="bullet">•</span><a href="/v5/api/utils/abi/interface/#Interface--properties">Properties</a></div><div style="padding-left: 56px"><span class="bullet">•</span><a href="/v5/api/utils/abi/interface/#Interface--formatting">Formatting</a></div><div style="padding-left: 56px"><span class="bullet">•</span><a href="/v5/api/utils/abi/interface/#Interface--fragment-access">Fragment Access</a></div><div style="padding-left: 56px"><span class="bullet">•</span><a href="/v5/api/utils/abi/interface/#Interface--signature-and-topic-hashes">Signature and Topic Hashes</a></div><div style="padding-left: 56px"><span class="bullet">•</span><a href="/v5/api/utils/abi/interface/#Interface--encoding-data">Encoding Data</a></div><div style="padding-left: 56px"><span class="bullet">•</span><a href="/v5/api/utils/abi/interface/#Interface--decoding-data">Decoding Data</a></div><div style="padding-left: 56px"><span class="bullet">•</span><a href="/v5/api/utils/abi/interface/#Interface--parsing">Parsing</a></div><div style="padding-left: 56px"><span class="bullet">•</span><a href="/v5/api/utils/abi/interface/#Interface--types">Types</a></div><div style="padding-left: 56px"><span class="bullet">•</span><a href="/v5/api/utils/abi/interface/#Interface--specifying-fragments">Specifying Fragments</a></div><div style="padding-left: 28px"><span class="bullet">•</span><a href="/v5/api/utils/abi/fragments/">Fragments</a></div><div style="padding-left: 56px"><span class="bullet">•</span><a href="/v5/api/utils/abi/fragments/#fragments--formats">Formats</a></div><div style="padding-left: 56px"><span class="bullet">•</span><a href="/v5/api/utils/abi/fragments/#Fragment">Fragment</a></div><div style="padding-left: 56px"><span class="bullet">•</span><a href="/v5/api/utils/abi/fragments/#ConstructorFragment">ConstructorFragment</a></div><div style="padding-left: 56px"><span class="bullet">•</span><a href="/v5/api/utils/abi/fragments/#EventFragment">EventFragment</a></div><div style="padding-left: 56px"><span class="bullet">•</span><a href="/v5/api/utils/abi/fragments/#FunctionFragment">FunctionFragment</a></div><div style="padding-left: 56px"><span class="bullet">•</span><a href="/v5/api/utils/abi/fragments/#ParamType">ParamType</a></div><div style="padding-left: 0px"><span class="bullet">•</span><a href="/v5/api/utils/address/">Addresses</a></div><div style="padding-left: 28px"><span class="bullet">•</span><a href="/v5/api/utils/address/#address-formats">Address Formats</a></div><div style="padding-left: 28px"><span class="bullet">•</span><a href="/v5/api/utils/address/#utils--address">Converting and Verifying</a></div><div style="padding-left: 28px"><span class="bullet">•</span><a href="/v5/api/utils/address/#utils--address-derivation">Derivation</a></div><div style="padding-left: 28px"><span class="bullet">•</span><a href="/v5/api/utils/address/#utils--contract-addresses">Contracts Addresses</a></div><div style="padding-left: 0px"><span class="bullet">•</span><a href="/v5/api/utils/bignumber/">BigNumber</a></div><div style="padding-left: 28px"><span class="bullet">•</span><a href="/v5/api/utils/bignumber/#BigNumber--types">Types</a></div><div style="padding-left: 28px"><span class="bullet">•</span><a href="/v5/api/utils/bignumber/#BigNumber--creating-instances">Creating Instances</a></div><div style="padding-left: 28px"><span class="bullet">•</span><a href="/v5/api/utils/bignumber/#BigNumber--methods">Methods</a></div><div style="padding-left: 28px"><span class="bullet
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