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kelvinator07kelvinator07
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updated final tasks
1 parent 5230292 commit 35a9bf3

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Lines changed: 187 additions & 7 deletions

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‎.github/workflows/main.yml‎

Lines changed: 165 additions & 3 deletions
Original file line numberDiff line numberDiff line change
@@ -85,9 +85,9 @@ jobs:
8585
chmod +x submission/05.sh
8686
FEE=$(submission/05.sh)
8787
if [[ "$(actual_sha "$FEE")" == "$EXPECTED_05_SHA" ]]; then
88-
echo "✅ Success: TX Fee (05.sh) verification passed!"
88+
echo "✅ Success: TX Fee verification passed!"
8989
else
90-
echo "❌ Error: TX Fee (05.sh) verification failed!"
90+
echo "❌ Error: TX Fee verification failed!"
9191
exit 1
9292
fi
9393
@@ -141,6 +141,35 @@ jobs:
141141
exit 1
142142
fi
143143

144+
# Verify descriptor.txt is valid
145+
if [[ ! -s submission/descriptor.txt ]]; then
146+
echo "❌ Error: descriptor.txt is empty or missing."
147+
exit 1
148+
fi
149+
DESC=$(cat submission/descriptor.txt | tr -d '\n')
150+
DESC_INFO=$(bitcoin-cli -signet getdescriptorinfo "$DESC" 2>/dev/null) || true
151+
if [[ -z "$DESC_INFO" ]]; then
152+
echo "❌ descriptor.txt could not be validated."
153+
exit 1
154+
fi
155+
DESC_VALID=$(echo "$DESC_INFO" | jq -r '.issolvable')
156+
if [[ "$DESC_VALID" == "true" ]]; then
157+
echo "✅ Descriptor is valid."
158+
else
159+
echo "❌ Descriptor is not valid."
160+
exit 1
161+
fi
162+
163+
# Verify descriptor can derive at least one tb1 address
164+
DESC_CHECKSUM=$(echo "$DESC_INFO" | jq -r '.descriptor')
165+
DESC_ADDR=$(bitcoin-cli -signet deriveaddresses "$DESC_CHECKSUM" "[0,0]" | jq -r '.[0]')
166+
if [[ "$DESC_ADDR" == "tb1"* ]]; then
167+
echo "✅ Descriptor derives a valid signet address: $DESC_ADDR"
168+
else
169+
echo "❌ Descriptor does not derive a valid signet address."
170+
exit 1
171+
fi
172+
144173
# Verify native SegWit address exists
145174
if [ ! -s submission/address.txt ]; then
146175
echo "❌ Error: address.txt is empty or missing."
@@ -327,4 +356,137 @@ jobs:
327356
else
328357
echo "❌ multisig-coinbase does not match."
329358
exit 1
330-
fi
359+
fi
360+
361+
362+
## TASK 6 — PSBT
363+
364+
# Verify psbt.txt exists and is valid PSBT
365+
if [[ ! -s submission/psbt.txt ]]; then
366+
echo "❌ Error: psbt.txt is empty or missing."
367+
exit 1
368+
fi
369+
PSBT_BASE64=$(cat submission/psbt.txt | tr -d '\n')
370+
PSBT_DECODED=$(bitcoin-cli -signet decodepsbt "$PSBT_BASE64" 2>/dev/null) || true
371+
if [[ -n "$PSBT_DECODED" ]]; then
372+
echo "✅ psbt.txt contains a valid PSBT."
373+
else
374+
echo "❌ psbt.txt does not contain a valid PSBT."
375+
exit 1
376+
fi
377+
378+
# Verify PSBT has output paying 5,000 sats to the target address
379+
PSBT_TARGET=$(echo "$PSBT_DECODED" | jq -r '.tx.vout[] | select(.scriptPubKey.address=="tb1qddpcyus3u603n63lk7m5epjllgexc24vj5ltp7") | .value')
380+
if [[ "$PSBT_TARGET" == "0.00005000" ]]; then
381+
echo "✅ PSBT pays exactly 5,000 sats to target address."
382+
else
383+
echo "❌ PSBT does not pay 5,000 sats to target address."
384+
exit 1
385+
fi
386+
387+
# Verify psbt-tx.txt exists and tx is confirmed on signet
388+
if [[ ! -s submission/psbt-tx.txt ]]; then
389+
echo "❌ Error: psbt-tx.txt is empty or missing."
390+
exit 1
391+
fi
392+
PSBT_TXID=$(cat submission/psbt-tx.txt | tr -d '\n')
393+
PSBT_TX_DETAILS=$(bitcoin-cli -signet getrawtransaction "$PSBT_TXID" true 2>/dev/null) || true
394+
if [[ -n "$PSBT_TX_DETAILS" ]]; then
395+
echo "✅ PSBT transaction exists on signet: $PSBT_TXID"
396+
else
397+
echo "❌ PSBT transaction not found on signet: $PSBT_TXID"
398+
exit 1
399+
fi
400+
401+
# Verify the broadcast tx pays 5,000 sats to target
402+
PSBT_TX_AMOUNT=$(echo "$PSBT_TX_DETAILS" | jq -r '.vout[] | select(.scriptPubKey.address=="tb1qddpcyus3u603n63lk7m5epjllgexc24vj5ltp7") | .value')
403+
if [[ "$PSBT_TX_AMOUNT" == "0.00005000" ]]; then
404+
echo "✅ Broadcast PSBT transaction pays exactly 5,000 sats to target."
405+
else
406+
echo "❌ Broadcast PSBT transaction does not pay 5,000 sats to target."
407+
exit 1
408+
fi
409+
410+
411+
## TASK 7 — P2WSH MULTISIG
412+
413+
# Verify p2wsh-address.txt
414+
if [[ ! -s submission/p2wsh-address.txt ]]; then
415+
echo "❌ Error: p2wsh-address.txt is empty or missing."
416+
exit 1
417+
fi
418+
P2WSH_ADDR=$(cat submission/p2wsh-address.txt | tr -d '\n')
419+
if [[ "$P2WSH_ADDR" == "tb1q"* ]]; then
420+
echo "✅ P2WSH address is native SegWit: $P2WSH_ADDR"
421+
else
422+
echo "❌ P2WSH address does not start with tb1q: $P2WSH_ADDR"
423+
exit 1
424+
fi
425+
426+
# Verify p2wsh-witness-script.txt is valid hex
427+
if [[ ! -s submission/p2wsh-witness-script.txt ]]; then
428+
echo "❌ Error: p2wsh-witness-script.txt is empty or missing."
429+
exit 1
430+
fi
431+
P2WSH_SCRIPT=$(cat submission/p2wsh-witness-script.txt | tr -d '\n')
432+
if [[ "$P2WSH_SCRIPT" =~ ^[0-9a-fA-F]+$ ]]; then
433+
echo "✅ P2WSH witness script is valid hex."
434+
else
435+
echo "❌ P2WSH witness script is not valid hex."
436+
exit 1
437+
fi
438+
439+
# Verify p2wsh-funding-tx.txt exists on signet and pays to the P2WSH address
440+
if [[ ! -s submission/p2wsh-funding-tx.txt ]]; then
441+
echo "❌ Error: p2wsh-funding-tx.txt is empty or missing."
442+
exit 1
443+
fi
444+
P2WSH_TXID=$(cat submission/p2wsh-funding-tx.txt | tr -d '\n')
445+
P2WSH_TX=$(bitcoin-cli -signet getrawtransaction "$P2WSH_TXID" true 2>/dev/null) || true
446+
if [[ -z "$P2WSH_TX" ]]; then
447+
echo "❌ P2WSH funding transaction not found on signet: $P2WSH_TXID"
448+
exit 1
449+
fi
450+
P2WSH_MATCH=$(echo "$P2WSH_TX" | jq --arg addr "$P2WSH_ADDR" '.vout[] | select(.scriptPubKey.address == $addr)')
451+
if [[ -n "$P2WSH_MATCH" ]]; then
452+
echo "✅ P2WSH funding transaction pays to the P2WSH address."
453+
else
454+
echo "❌ P2WSH funding transaction does not pay to the P2WSH address."
455+
exit 1
456+
fi
457+
458+
459+
## TASK 8 — OP_RETURN
460+
461+
# Verify opreturn-tx.txt exists on signet
462+
if [[ ! -s submission/opreturn-tx.txt ]]; then
463+
echo "❌ Error: opreturn-tx.txt is empty or missing."
464+
exit 1
465+
fi
466+
OPRETURN_TXID=$(cat submission/opreturn-tx.txt | tr -d '\n')
467+
OPRETURN_TX=$(bitcoin-cli -signet getrawtransaction "$OPRETURN_TXID" true 2>/dev/null) || true
468+
if [[ -z "$OPRETURN_TX" ]]; then
469+
echo "❌ OP_RETURN transaction not found on signet: $OPRETURN_TXID"
470+
exit 1
471+
fi
472+
echo "✅ OP_RETURN transaction exists on signet: $OPRETURN_TXID"
473+
474+
# Verify tx has a nulldata output
475+
OPRETURN_HEX=$(echo "$OPRETURN_TX" | jq -r '.vout[] | select(.scriptPubKey.type=="nulldata") | .scriptPubKey.hex')
476+
if [[ -z "$OPRETURN_HEX" ]]; then
477+
echo "❌ Transaction does not contain an OP_RETURN output."
478+
exit 1
479+
fi
480+
echo "✅ Transaction contains an OP_RETURN output."
481+
482+
# Verify the OP_RETURN data matches the student's GitHub username
483+
OPRETURN_DATA=$(echo "$OPRETURN_HEX" | sed 's/^6a//' | sed 's/^..//')
484+
OPRETURN_DECODED=$(echo "$OPRETURN_DATA" | xxd -r -p)
485+
EXPECTED_OPRETURN_SHA=$(printf '%s' "$WALLET" | sha256sum | awk '{print $1}')
486+
ACTUAL_OPRETURN_SHA=$(printf '%s' "$OPRETURN_DECODED" | sha256sum | awk '{print $1}')
487+
if [[ "$ACTUAL_OPRETURN_SHA" == "$EXPECTED_OPRETURN_SHA" ]]; then
488+
echo "✅ OP_RETURN data matches GitHub username."
489+
else
490+
echo "❌ OP_RETURN data does not match GitHub username."
491+
exit 1
492+
fi

‎submission/FINAL-TASK.MD‎

Lines changed: 22 additions & 4 deletions
Original file line numberDiff line numberDiff line change
@@ -8,14 +8,16 @@ Hence, you should add your wallet name to subsequent commands, for example
88
`bitcoin-cli -signet -rpcwallet=github-username getblockcount`
99

1010
You dont need to add any bitcoin-cli commands in this exercise.
11-
The goal is to update the `xxx.txt` files with the address, transaction and block hashes.
11+
The goal is to update the `xxx.txt` files with the address, transaction and block hashes. e.t.c..
1212

1313
### Complete the tasks below
1414

15-
1. Create a bitcoin wallet using your github username as wallet name
15+
1. Create a descriptor-based bitcoin wallet using your github username as wallet name
1616
- Add your wallet name to the `wallet.txt` file
17+
- Export the receiving descriptor (external chain, index 0) with checksum
18+
- Save the receiving descriptor to `descriptor.txt`
1719

18-
### PS: Add `-rpcwallet=github-username` flag for subsequent commands below
20+
**PS: Add `-rpcwallet=github-username` flag for subsequent commands below**
1921

2022
2. Create a native SegWit address
2123
- Add your address to the `address.txt` file
@@ -29,7 +31,7 @@ The goal is to update the `xxx.txt` files with the address, transaction and bloc
2931
- Send exactly 10,000 sats to `tb1qddpcyus3u603n63lk7m5epjllgexc24vj5ltp7`
3032
- Use transaction Fee: 700 sats
3133
- Make sure transaction fee can be later updated to a higher fee
32-
- Broadcast transaction
34+
- Sign and broadcast the transaction
3335
- Save txid to `transaction-2.txt`
3436
- Save transaction block hash to `block-2.txt` and coinbase transaction to `coinbase-2.txt`
3537

@@ -38,3 +40,19 @@ The goal is to update the `xxx.txt` files with the address, transaction and bloc
3840
- Save redeemScript to `multisig-redeem.txt`
3941
- Fund using this faucet(`alt.signetfaucet.com`), and save txid to `multisig-transaction.txt`
4042
- Save transaction block hash to `multisig-block.txt` and coinbase transaction to `multisig-coinbase.txt`
43+
44+
6. Create and finalize a PSBT (Partially Signed Bitcoin Transaction):
45+
- Using your wallet, create a PSBT that sends exactly 5,000 sats to `tb1qddpcyus3u603n63lk7m5epjllgexc24vj5ltp7`
46+
- Sign and finalize the PSBT
47+
- Save the finalized PSBT (base64) to `psbt.txt`
48+
- Broadcast the transaction and save the txid to `psbt-tx.txt`
49+
50+
7. Create a native SegWit (P2WSH) 2-of-3 multisig address:
51+
- Save the address to `p2wsh-address.txt`
52+
- Save the witnessScript to `p2wsh-witness-script.txt`
53+
- Fund using the faucet (`alt.signetfaucet.com`), and save txid to `p2wsh-funding-tx.txt`
54+
55+
8. Embed your GitHub username in an OP_RETURN transaction output:
56+
- Create a raw transaction with an OP_RETURN output containing your GitHub username
57+
- Fund, sign, and broadcast the transaction
58+
- Save the txid to `opreturn-tx.txt`

‎submission/descriptor.txt‎

Whitespace-only changes.

‎submission/opreturn-tx.txt‎

Whitespace-only changes.

‎submission/p2wsh-address.txt‎

Whitespace-only changes.

‎submission/p2wsh-funding-tx.txt‎

Whitespace-only changes.

‎submission/p2wsh-witness-script.txt‎

Whitespace-only changes.

‎submission/psbt-tx.txt‎

Whitespace-only changes.

‎submission/psbt.txt‎

Whitespace-only changes.

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