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Fix: Improve Transaction Diagram Responsiveness #71

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merged 1 commit into from
Feb 14, 2025
Merged

Fix: Improve Transaction Diagram Responsiveness #71

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35 changes: 23 additions & 12 deletions decoding/transaction-signing-01.mdx
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Original file line number Diff line number Diff line change
Expand Up @@ -21,20 +21,31 @@ Each input in a Bitcoin transaction must specify:
- ScriptSig: Placeholder for the unlocking script
- Sequence (4 bytes): Usually 0xFFFFFFFF

<div className="w-full rounded-xl overflow-hidden full-width">
<SvgDisplay
src="/decoding-bitcoin/static/images/topics/transactions/signature/signature7.svg"
width="100%"
height="auto"
/>
<div className="w-full rounded-xl overflow-x-auto overflow-y-hidden full-width">
<div className="min-w-[800px]">
<SvgDisplay
src="/decoding-bitcoin/static/images/topics/transactions/signature/signature7.svg"
width="100%"
height="100%"
className="min-h-[400px] md:min-h-[500px] lg:min-h-[600px] object-contain"
style={{
aspectRatio: "16/9",
maxHeight: "800px",
transform: "scale(1.2)",
transformOrigin: "center center"
}}
/>
</div>
</div>

The following table summarizes our UTXOs (Transaction IDs shown in big-endian format):

| Input | Transaction ID (big-endian) | Output Index | Sequence |
| ----- | ---------------------------------------------------------------- | ------------ | -------- |
| #1 | 9f96add4e4db413543df3eea1781c3be62637f1e2dd44069fa99801a88f7f7ff | 0 | eeffffff |
| #2 | 8ac60eb9575db5b2d987e29f301b5b819ea83a5c6579d282d189cc04b8e151ef | 1 | ffffffff |
<div className="w-full rounded-xl overflow-x-auto overflow-y-hidden">
<div className="min-w-[800px]">
| Input | Transaction ID (big-endian) | Output Index | Sequence |
| ----- | -------------------------- | ------------ | -------- |
| #1 | 9f96add4e4db413543df3eea1781c3be62637f1e2dd44069fa99801a88f7f7ff | 0 | eeffffff |
| #2 | 8ac60eb9575db5b2d987e29f301b5b819ea83a5c6579d282d189cc04b8e151ef | 1 | ffffffff |
</div>
</div>

_Note: In the transaction serialization below, these Transaction IDs are converted to little-endian format as required by the Bitcoin protocol._

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27 changes: 17 additions & 10 deletions decoding/transaction-signing-02.mdx
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Original file line number Diff line number Diff line change
Expand Up @@ -19,12 +19,15 @@ Each output in a Bitcoin transaction requires:
- Amount (8 bytes): Value in satoshis
- ScriptPubKey: Locking script that defines spending conditions

<div className="w-full rounded-xl overflow-hidden full-width">
<SvgDisplay
src="/decoding-bitcoin/static/images/topics/transactions/signature/signature8.svg"
width="100%"
height="auto"
/>
<div className="w-full rounded-xl overflow-x-auto overflow-y-hidden full-width">
<div className="min-w-[800px]">
<SvgDisplay
src="/decoding-bitcoin/static/images/topics/transactions/signature/signature8.svg"
width="100%"
height="auto"
className="min-h-[150px] md:min-h-[180px] lg:min-h-[220px] object-contain"
/>
</div>
</div>

---
Expand All @@ -48,10 +51,14 @@ Each output in a Bitcoin transaction requires:

The following table summarizes our outputs from test vector:

| Output | Amount (BTC) | ScriptPubKey |
| ------ | ------------ | ---------------------------------------------------- |
| #1 | 1.2 | 1976a9148280b37df378db99f66f85c95a783a76ac7a6d5988ac |
| #2 | 2.2 | 1976a9143bde42dbee7e4dbe6a21b2d50ce2f0167faa815988ac |
<div className="w-full rounded-xl overflow-x-auto overflow-y-hidden">
<div className="min-w-[800px]">
| Output | Amount (BTC) | ScriptPubKey |
| ------ | ------------ | ---------------------------------------------------- |
| #1 | 1.2 | 1976a9148280b37df378db99f66f85c95a783a76ac7a6d5988ac |
| #2 | 2.2 | 1976a9143bde42dbee7e4dbe6a21b2d50ce2f0167faa815988ac |
</div>
</div>

Our transaction structure at this stage is:

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15 changes: 9 additions & 6 deletions decoding/transaction-signing-03.mdx
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Expand Up @@ -18,12 +18,15 @@ When signing a P2WPKH (Segregated Witness) input, the signature and public key w

This is different from legacy transactions where signatures are placed directly in the `scriptSig`. The witness field starts empty and gets populated during the signing process.

<div className="w-full rounded-xl overflow-hidden full-width">
<SvgDisplay
src="/decoding-bitcoin/static/images/topics/transactions/signature/signature9.svg"
width="100%"
height="auto"
/>
<div className="w-full rounded-xl overflow-x-auto overflow-y-hidden full-width">
<div className="min-w-[800px]">
<SvgDisplay
src="/decoding-bitcoin/static/images/topics/transactions/signature/signature9.svg"
width="100%"
height="auto"
className="min-h-[150px] md:min-h-[180px] lg:min-h-[220px] object-contain"
/>
</div>
</div>

For signing a P2WPKH input, we need to generate the `scriptCode`
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15 changes: 9 additions & 6 deletions decoding/transaction-signing-04.mdx
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Original file line number Diff line number Diff line change
Expand Up @@ -14,12 +14,15 @@ images:
parent: "transaction-signing"
---

<div className="w-full rounded-xl overflow-hidden full-width">
<SvgDisplay
src="/decoding-bitcoin/static/images/topics/transactions/signature/signature9.svg"
width="100%"
height="auto"
/>
<div className="w-full rounded-xl overflow-x-auto overflow-y-hidden full-width">
<div className="min-w-[800px]">
<SvgDisplay
src="/decoding-bitcoin/static/images/topics/transactions/signature/signature9.svg"
width="100%"
height="auto"
className="min-h-[150px] md:min-h-[180px] lg:min-h-[220px] object-contain"
/>
</div>
</div>

After creating the basic transaction and scriptCode, we need to calculate three important hashes:
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14 changes: 9 additions & 5 deletions decoding/transaction-signing-06.mdx
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Original file line number Diff line number Diff line change
Expand Up @@ -24,11 +24,15 @@ When signing a transaction input, we follow these steps:

Let's use these values from our test vector:

| Value | Hex |
|-------|-----|
| Private Key | 619c335025c7f4012e556c2a58b2506e30b8511b53ade95ea316fd8c3286feb9 |
| Public Key | 025476c2e83188368da1ff3e292e7acafcdb3566bb0ad253f62fc70f07aeee6357 |
| Commitment Hash | c37af31116d1b27caf68aae9e3ac82f1477929014d5b917657d0eb49478cb670 |
<div className="w-full rounded-xl overflow-x-auto overflow-y-hidden">
<div className="min-w-[800px]">
| Value | Hex |
|-------|-----|
| Private Key | 619c335025c7f4012e556c2a58b2506e30b8511b53ade95ea316fd8c3286feb9 |
| Public Key | 025476c2e83188368da1ff3e292e7acafcdb3566bb0ad253f62fc70f07aeee6357 |
| Commitment Hash | c37af31116d1b27caf68aae9e3ac82f1477929014d5b917657d0eb49478cb670 |
</div>
</div>

## Step 1: ECDSA Signature Generation

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15 changes: 9 additions & 6 deletions decoding/transaction-signing-07.mdx
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Expand Up @@ -16,12 +16,15 @@ parent: "transaction-signing"

Our transaction now has all its fields populated except for the witness data.

<div className="w-full rounded-xl overflow-hidden full-width">
<SvgDisplay
src="/decoding-bitcoin/static/images/topics/transactions/signature/signature9.svg"
width="100%"
height="auto"
/>
<div className="w-full rounded-xl overflow-x-auto overflow-y-hidden full-width">
<div className="min-w-[800px]">
<SvgDisplay
src="/decoding-bitcoin/static/images/topics/transactions/signature/signature9.svg"
width="100%"
height="auto"
className="min-h-[150px] md:min-h-[180px] lg:min-h-[220px] object-contain"
/>
</div>
</div>

For a P2WPKH input, the witness structure is:
Expand Down
15 changes: 9 additions & 6 deletions decoding/transaction-signing-08.mdx
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Original file line number Diff line number Diff line change
Expand Up @@ -14,12 +14,15 @@ images:
parent: "transaction-signing"
---

<div className="w-full rounded-xl overflow-hidden full-width">
<SvgDisplay
src="/decoding-bitcoin/static/images/topics/transactions/signature/signature10.svg"
width="100%"
height="auto"
/>
<div className="w-full rounded-xl overflow-x-auto overflow-y-hidden full-width">
<div className="min-w-[800px]">
<SvgDisplay
src="/decoding-bitcoin/static/images/topics/transactions/signature/signature10.svg"
width="100%"
height="auto"
className="min-h-[150px] md:min-h-[180px] lg:min-h-[220px] object-contain"
/>
</div>
</div>

Our final signed transaction hex:
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