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Merge pull request #71 from jrakibi/fix/responsive-transaction-diagrams
Fix: Improve Transaction Diagram Responsiveness
2 parents 39bdf78 + d7ab2ff commit edc515f

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‎decoding/transaction-signing-01.mdx‎

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@@ -21,20 +21,31 @@ Each input in a Bitcoin transaction must specify:
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- ScriptSig: Placeholder for the unlocking script
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- Sequence (4 bytes): Usually 0xFFFFFFFF
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<div className="w-full rounded-xl overflow-hidden full-width">
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<SvgDisplay
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src="/decoding-bitcoin/static/images/topics/transactions/signature/signature7.svg"
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width="100%"
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height="auto"
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/>
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<div className="w-full rounded-xl overflow-x-auto overflow-y-hidden full-width">
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<div className="min-w-[800px]">
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<SvgDisplay
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src="/decoding-bitcoin/static/images/topics/transactions/signature/signature7.svg"
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width="100%"
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height="100%"
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className="min-h-[400px] md:min-h-[500px] lg:min-h-[600px] object-contain"
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style={{
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aspectRatio: "16/9",
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maxHeight: "800px",
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transform: "scale(1.2)",
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transformOrigin: "center center"
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}}
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/>
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</div>
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</div>
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The following table summarizes our UTXOs (Transaction IDs shown in big-endian format):
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| Input | Transaction ID (big-endian) | Output Index | Sequence |
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| ----- | ---------------------------------------------------------------- | ------------ | -------- |
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| #1 | 9f96add4e4db413543df3eea1781c3be62637f1e2dd44069fa99801a88f7f7ff | 0 | eeffffff |
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| #2 | 8ac60eb9575db5b2d987e29f301b5b819ea83a5c6579d282d189cc04b8e151ef | 1 | ffffffff |
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<div className="w-full rounded-xl overflow-x-auto overflow-y-hidden">
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<div className="min-w-[800px]">
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| Input | Transaction ID (big-endian) | Output Index | Sequence |
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| ----- | -------------------------- | ------------ | -------- |
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| #1 | 9f96add4e4db413543df3eea1781c3be62637f1e2dd44069fa99801a88f7f7ff | 0 | eeffffff |
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| #2 | 8ac60eb9575db5b2d987e29f301b5b819ea83a5c6579d282d189cc04b8e151ef | 1 | ffffffff |
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</div>
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</div>
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_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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‎decoding/transaction-signing-02.mdx‎

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@@ -19,12 +19,15 @@ Each output in a Bitcoin transaction requires:
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- Amount (8 bytes): Value in satoshis
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- ScriptPubKey: Locking script that defines spending conditions
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<div className="w-full rounded-xl overflow-hidden full-width">
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<SvgDisplay
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src="/decoding-bitcoin/static/images/topics/transactions/signature/signature8.svg"
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width="100%"
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height="auto"
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/>
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<div className="w-full rounded-xl overflow-x-auto overflow-y-hidden full-width">
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<div className="min-w-[800px]">
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<SvgDisplay
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src="/decoding-bitcoin/static/images/topics/transactions/signature/signature8.svg"
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width="100%"
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height="auto"
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className="min-h-[150px] md:min-h-[180px] lg:min-h-[220px] object-contain"
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/>
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</div>
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</div>
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---
@@ -48,10 +51,14 @@ Each output in a Bitcoin transaction requires:
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The following table summarizes our outputs from test vector:
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| Output | Amount (BTC) | ScriptPubKey |
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| ------ | ------------ | ---------------------------------------------------- |
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| #1 | 1.2 | 1976a9148280b37df378db99f66f85c95a783a76ac7a6d5988ac |
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| #2 | 2.2 | 1976a9143bde42dbee7e4dbe6a21b2d50ce2f0167faa815988ac |
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<div className="w-full rounded-xl overflow-x-auto overflow-y-hidden">
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<div className="min-w-[800px]">
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| Output | Amount (BTC) | ScriptPubKey |
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| ------ | ------------ | ---------------------------------------------------- |
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| #1 | 1.2 | 1976a9148280b37df378db99f66f85c95a783a76ac7a6d5988ac |
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| #2 | 2.2 | 1976a9143bde42dbee7e4dbe6a21b2d50ce2f0167faa815988ac |
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</div>
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</div>
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Our transaction structure at this stage is:
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‎decoding/transaction-signing-03.mdx‎

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@@ -18,12 +18,15 @@ When signing a P2WPKH (Segregated Witness) input, the signature and public key w
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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.
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<div className="w-full rounded-xl overflow-hidden full-width">
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<SvgDisplay
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src="/decoding-bitcoin/static/images/topics/transactions/signature/signature9.svg"
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width="100%"
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height="auto"
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/>
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<div className="w-full rounded-xl overflow-x-auto overflow-y-hidden full-width">
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<div className="min-w-[800px]">
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<SvgDisplay
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src="/decoding-bitcoin/static/images/topics/transactions/signature/signature9.svg"
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width="100%"
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height="auto"
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className="min-h-[150px] md:min-h-[180px] lg:min-h-[220px] object-contain"
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/>
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</div>
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</div>
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For signing a P2WPKH input, we need to generate the `scriptCode`

‎decoding/transaction-signing-04.mdx‎

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@@ -14,12 +14,15 @@ images:
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parent: "transaction-signing"
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---
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<div className="w-full rounded-xl overflow-hidden full-width">
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<SvgDisplay
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src="/decoding-bitcoin/static/images/topics/transactions/signature/signature9.svg"
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width="100%"
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height="auto"
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/>
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<div className="w-full rounded-xl overflow-x-auto overflow-y-hidden full-width">
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<div className="min-w-[800px]">
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<SvgDisplay
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src="/decoding-bitcoin/static/images/topics/transactions/signature/signature9.svg"
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width="100%"
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height="auto"
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className="min-h-[150px] md:min-h-[180px] lg:min-h-[220px] object-contain"
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/>
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</div>
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</div>
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After creating the basic transaction and scriptCode, we need to calculate three important hashes:

‎decoding/transaction-signing-06.mdx‎

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@@ -24,11 +24,15 @@ When signing a transaction input, we follow these steps:
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Let's use these values from our test vector:
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| Value | Hex |
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|-------|-----|
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| Private Key | 619c335025c7f4012e556c2a58b2506e30b8511b53ade95ea316fd8c3286feb9 |
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| Public Key | 025476c2e83188368da1ff3e292e7acafcdb3566bb0ad253f62fc70f07aeee6357 |
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| Commitment Hash | c37af31116d1b27caf68aae9e3ac82f1477929014d5b917657d0eb49478cb670 |
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<div className="w-full rounded-xl overflow-x-auto overflow-y-hidden">
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<div className="min-w-[800px]">
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| Value | Hex |
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|-------|-----|
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| Private Key | 619c335025c7f4012e556c2a58b2506e30b8511b53ade95ea316fd8c3286feb9 |
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| Public Key | 025476c2e83188368da1ff3e292e7acafcdb3566bb0ad253f62fc70f07aeee6357 |
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| Commitment Hash | c37af31116d1b27caf68aae9e3ac82f1477929014d5b917657d0eb49478cb670 |
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</div>
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</div>
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## Step 1: ECDSA Signature Generation
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‎decoding/transaction-signing-07.mdx‎

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@@ -16,12 +16,15 @@ parent: "transaction-signing"
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Our transaction now has all its fields populated except for the witness data.
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<div className="w-full rounded-xl overflow-hidden full-width">
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<SvgDisplay
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src="/decoding-bitcoin/static/images/topics/transactions/signature/signature9.svg"
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width="100%"
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height="auto"
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/>
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<div className="w-full rounded-xl overflow-x-auto overflow-y-hidden full-width">
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<div className="min-w-[800px]">
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<SvgDisplay
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src="/decoding-bitcoin/static/images/topics/transactions/signature/signature9.svg"
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width="100%"
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height="auto"
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className="min-h-[150px] md:min-h-[180px] lg:min-h-[220px] object-contain"
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/>
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</div>
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</div>
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For a P2WPKH input, the witness structure is:

‎decoding/transaction-signing-08.mdx‎

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

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