blocks|key|624904|text|JavaScript无法安全地将这么大的数字表示为本机类型的Number，因此web3js使用BigNumber。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|624905|如果不安全地将较大的数字转换为带有小数的本机Number类型，则可以：|624906|将其转换为String|ordered-list-item|624907|加上小数点|624908|使用本机函数parseFloat()|624909|但请注意，它可能会导致舍入错误，因为JS在不同浏览器及其版本/+NodeJS版本/处理器体系结构/等等中处理数字的方式略有不同。|624910|const+balance+=+new+web3.utils.BN("806179086037007");
const+decimals+=+9;

const+balanceString+=+balance.toString();

//+builds+the+String+"806179.086037007"
const+balanceStringWithDecimalPoint+=+[
++++balanceString.slice(0,+balanceString.length+-+decimals),+
++++".",
++++balanceString.slice(balanceString.length+-+decimals)
].join("");


const+nativeNumberUnsafe+=+Number.parseFloat(balanceStringWithDecimalPoint);
console.log(nativeNumberUnsafe);|code-block|syntax|javascript|624911|entityMap|0|LINK|mutability|MUTABLE|url|https://web3js.readthedocs.io/en/v1.8.0/web3-utils.html#bn|1|https://www.w3schools.com/jsref/jsref_number_parsefloat.asp^0|U|6|13|6|1B|9|0|0|M|6|0|5|6|0|0|6|C|1|0|0|0^^$0|@$1|2|3|4|5|6|7|15|8|@$9|16|A|17|B|C]|$9|18|A|19|B|C]]|D|@$9|1A|A|1B|1|1C]]|E|$]]|$1|F|3|G|5|6|7|1D|8|@$9|1E|A|1F|B|C]]|D|@]|E|$]]|$1|H|3|I|5|J|7|1G|8|@$9|1H|A|1I|B|C]]|D|@]|E|$]]|$1|K|3|L|5|J|7|1J|8|@]|D|@]|E|$]]|$1|M|3|N|5|J|7|1K|8|@]|D|@$9|1L|A|1M|1|1N]]|E|$]]|$1|O|3|P|5|6|7|1O|8|@]|D|@]|E|$]]|$1|Q|3|R|5|S|7|1P|8|@]|D|@]|E|$T|U]]|$1|V|3|-4|5|6|7|1Q|8|@]|D|@]|E|$]]]|W|$X|$5|Y|Z|10|E|$11|12]]|13|$5|Y|Z|10|E|$11|14]]]]

JavaScript is not able to safely represent this large number as the native type <code>Number</code>, so <code>web3js</code> uses <a href="https://web3js.readthedocs.io/en/v1.8.0/web3-utils.html#bn" rel="nofollow noreferrer">BigNumber</a> instead.
If you want to unsafely convert the larger number to native <code>Number</code> type with decimals, you can:
<ol>
<li>Convert it to <code>String</code></li>
<li>Add the decimal point</li>
<li>Use the native function <a href="https://www.w3schools.com/jsref/jsref_number_parsefloat.asp" rel="nofollow noreferrer">parseFloat()</a></li>
</ol>
But be aware that it might cause rounding errors, as JS works with numbers slightly differently in different browsers and their versions / NodeJS versions / processor architectures / etc.
<pre><code>const balance = new web3.utils.BN(&quot;806179086037007&quot;);
const decimals = 9;

const balanceString = balance.toString();

// builds the String &quot;806179.086037007&quot;
const balanceStringWithDecimalPoint = [
 balanceString.slice(0, balanceString.length - decimals), 
 &quot;.&quot;,
 balanceString.slice(balanceString.length - decimals)
].join(&quot;&quot;);


const nativeNumberUnsafe = Number.parseFloat(balanceStringWithDecimalPoint);
console.log(nativeNumberUnsafe);
</code></pre>

blocks|key|1617409|text|如果您愿意使用ethers.io库，下面是一个简单的示例来实现这一点：|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1617410|//+The+Contract+object
const+daiContract+=+new+ethers.Contract(daiAddress,+daiAbi,+provider);

//+Get+the+balance+of+an+address
balance+=+await+daiContract.balanceOf(userAddress)
//+{+BigNumber:+"6026189439794538201631"+}

//+Format+the+DAI+for+displaying+to+the+user
ethers.utils.formatUnits(balance,+18)
//+'6026.189439794538201631'|code-block|syntax|javascript|1617411|formatUnits函数接受BigNumber和小数的平衡，所以在您的情况下，需要传递9而不是18。|style|CODE|1617412|entityMap|0|LINK|mutability|MUTABLE|url|https://docs.ethers.io/v5/getting-started/#getting-started--contracts^0|7|A|0|0|0|0|B|F|9|18|1|1C|2|0^^$0|@$1|2|3|4|5|6|7|U|8|@]|9|@$A|V|B|W|1|X]]|C|$]]|$1|D|3|E|5|F|7|Y|8|@]|9|@]|C|$G|H]]|$1|I|3|J|5|6|7|Z|8|@$A|10|B|11|K|L]|$A|12|B|13|K|L]|$A|14|B|15|K|L]|$A|16|B|17|K|L]]|9|@]|C|$]]|$1|M|3|-4|5|6|7|18|8|@]|9|@]|C|$]]]|N|$O|$5|P|Q|R|C|$S|T]]]]

If you are open to using <a href="https://docs.ethers.io/v5/getting-started/#getting-started--contracts" rel="nofollow noreferrer">ethers.io library</a>, here is a simple example to achieve this:
<pre><code>// The Contract object
const daiContract = new ethers.Contract(daiAddress, daiAbi, provider);

// Get the balance of an address
balance = await daiContract.balanceOf(userAddress)
// { BigNumber: &quot;6026189439794538201631&quot; }

// Format the DAI for displaying to the user
ethers.utils.formatUnits(balance, 18)
// '6026.189439794538201631'
</code></pre>
The <code>formatUnits</code> function accepts the balance in <code>BigNumber</code> and number of decimals, so in your case you need to pass <code>9</code> instead of <code>18</code>

i'm having a real brain fart atm. i have a simple getBalance function on a contract that accepts a wallet. this returns the balance, but as you know it's the BigNumber of the balance and doesnt factor in the decimals. So how do i turn:
806179086037007
into 806179.086037007
where the decimals for this given contract is 9.
<pre><code>const contract = new web3.eth.Contract(minABI, contractName);
const decimals = await contract.methods.decimals().call();
const balance = await contract.methods
 .balanceOf(address)
 .call();
</code></pre>
Ive tried varous solutions that i've found online and cant seem to get the value i want.

Web3.js get the "human readable value" balance for a contract and wallet

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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我有个真正的大脑放屁取款机。在接受钱包的合同上，我有一个简单的getBalance函数。这会返回平衡，但正如你所知道的，它是天平的BigNumber，不考虑小数。那么，我该如何转向：806179086037007变成806179.086037007这个合同的小数是9。const contract = new web3....

问Web3.js获得合同和钱包的“人类可读值”余额
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