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Add faq: why block fee ranges don't match tx fees

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hunicus 2022-11-13 22:38:36 -05:00
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7
frontend/src/app/docs/api-docs/api-docs-data.ts
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@ -8660,6 +8660,13 @@ export const faqData = [
fragment: "why-block-timestamps-dont-always-increase", fragment: "why-block-timestamps-dont-always-increase",
title: "Why don't block timestamps always increase?", title: "Why don't block timestamps always increase?",
}, },
{
type: "endpoint",
category: "advanced",
showConditions: bitcoinNetworks,
fragment: "why-dont-fee-ranges-match",
title: "Why doesn't the fee range shown for a block match the feerates of transactions within the block?",
},
{ {
type: "category", type: "category",
category: "self-hosting", category: "self-hosting",

6
frontend/src/app/docs/api-docs/api-docs.component.html
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@ -207,6 +207,12 @@
<p>Block validation rules do not strictly require that a block's timestamp be more recent than the timestamp of the block preceding it. Without a central authority, it's impossible to know what the exact correct time is. Instead, the Bitcoin protocol requires that a block's timestamp meet certain requirements. One of those requirements is that a block's timestamp cannot be older than the median timestamp of the 12 blocks that came before it. See more details <a href="https://en.bitcoin.it/wiki/Block_timestamp" target="_blank">here</a>.</p><p>As a result, timestamps are only accurate to within an hour or so, which sometimes results in blocks with timestamps that appear out of order.</p> <p>Block validation rules do not strictly require that a block's timestamp be more recent than the timestamp of the block preceding it. Without a central authority, it's impossible to know what the exact correct time is. Instead, the Bitcoin protocol requires that a block's timestamp meet certain requirements. One of those requirements is that a block's timestamp cannot be older than the median timestamp of the 12 blocks that came before it. See more details <a href="https://en.bitcoin.it/wiki/Block_timestamp" target="_blank">here</a>.</p><p>As a result, timestamps are only accurate to within an hour or so, which sometimes results in blocks with timestamps that appear out of order.</p>
</ng-template> </ng-template>
<ng-template type="why-dont-fee-ranges-match">
<p>Mempool aims to show you the <i>effective feerate</i> range for blocks—how much would you actually need to pay to get a transaction included in a block.</p>
<p>A transaction's effective feerate is not always the same as the feerate explicitly set for it. For example, if you see a 1 s/vb transaction in a block with a displayed feerate range of 5 s/vb to 72 s/vb, chances are that 1 s/vb transaction had a high-feerate child transaction that boosted its effective feerate to 5 s/vb or higher (this is how CPFP fee-bumping works). In such a case, it would be misleading to use 1 s/vb as the lower bound of the block's feerate range because it actually required more than 1 s/vb to confirm that transaction in that block.</p>
<p>For unconfirmed CPFP transactions, Mempool will show the effective feerate (along with descendent & ancestor transaction information) on the transaction page. For confirmed transactions, CPFP relationships are not stored, so this additional information is not shown.</p>
</ng-template>
<ng-template type="who-runs-this-website"> <ng-template type="who-runs-this-website">
The official mempool.space website is operated by The Mempool Open Source Project. See more information on our <a [routerLink]="['/about']">About page</a>. There are also many unofficial instances of this website operated by individual members of the Bitcoin community. The official mempool.space website is operated by The Mempool Open Source Project. See more information on our <a [routerLink]="['/about']">About page</a>. There are also many unofficial instances of this website operated by individual members of the Bitcoin community.
</ng-template> </ng-template>