Updated submission scripts for week 3 exercises

submission/01.sh

@@ -1 +1,2 @@
 # Create a wallet with the name "btrustwallet".
+bitcoin-cli -regtest createwallet "btrustwallet"

submission/02.sh

@@ -1 +1,14 @@
 # Create a native segwit address and get the public key from the address.
+# submission/02.sh
+#!/bin/bash
+
+# Generate a new bech32 (SegWit) address
+ADDRESS=$(bitcoin-cli -regtest -rpcwallet=btrustwallet getnewaddress "" bech32)
+
+# Get the public key associated with the address
+PUB_KEY=$(bitcoin-cli -regtest -rpcwallet=btrustwallet getaddressinfo "$ADDRESS" | jq -r '.pubkey')
+
+# Output the public key
+echo "$PUB_KEY"
+
+

submission/03.sh

@@ -1,2 +1,18 @@
 # Create a 1-of-4 P2SH multisig address from the public keys in the four inputs of this raw tx:
 # transaction="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"
+#!/bin/bash
+
+# Define public keys
+Npublic1="02bbb4ba3f39b5f3258f0014d5e4eab5a6990009e3e1dba6e8eaff10b3832394f7"
+Npublic2="03aaf17b1a7b4108f7e5bc4f7d59c20f7fb1a72dbc74a9a3d6d1f8488df159c760"
+Npublic3="03a6d919c76d9117c23570a767450013edf31cf6be7d3b5a881c06a9aa1f2c24ce"
+Npublic4="0383d12258e3e294a6d7754336f6b4baef992ec4b91694d3460bcb022b11da8cd2"
+
+# Generate P2SH multisig address
+MULTISIG_OUTPUT=$(bitcoin-cli -regtest createmultisig 1 "[\"$Npublic1\", \"$Npublic2\", \"$Npublic3\", \"$Npublic4\"]")
+
+# Extract only the address from the JSON output
+P2SH_ADDRESS=$(echo "$MULTISIG_OUTPUT" | jq -r '.address')
+
+# Output the address
+echo "$P2SH_ADDRESS"

submission/04.sh

@@ -3,3 +3,20 @@
 # 024bc198a88b69316952414af34105613c3617561a433a229100a0966cd631dd3d
 # 035e11024a7fa1e0ca537e0e76b15c1631486f6611c7d8187aea8f6c1ae5d30617
 # 03ce11c7b563c3d7fae916351f234eac5089ad2e42fa9e29a94ee944e00c880c66
+#!/bin/bash
+
+# Define public keys
+zpublic1="024bc198a88b69316952414af34105613c3617561a433a229100a0966cd631dd3d"
+zpublic2="035e11024a7fa1e0ca537e0e76b15c1631486f6611c7d8187aea8f6c1ae5d30617"
+zpublic3="03ce11c7b563c3d7fae916351f234eac5089ad2e42fa9e29a94ee944e00c880c66"
+
+# Generate P2SH multisig address
+MULTISIG_OUTPUT=$(bitcoin-cli -regtest createmultisig 2 "[\"$zpublic1\", \"$zpublic2\", \"$zpublic3\"]")
+
+# Extract only the address from the JSON output
+P2SH_ADDRESS=$(echo "$MULTISIG_OUTPUT" | jq -r '.address')
+
+# Output the address
+echo "$P2SH_ADDRESS"
+
+

submission/05.sh

@@ -3,3 +3,60 @@
 # Amount of 20,000,000 satoshis to this address: 2MvLcssW49n9atmksjwg2ZCMsEMsoj3pzUP 
 # Use the UTXOs from the transaction below
 # transaction="01000000000101c8b0928edebbec5e698d5f86d0474595d9f6a5b2e4e3772cd9d1005f23bdef772500000000ffffffff0276b4fa0000000000160014f848fe5267491a8a5d32423de4b0a24d1065c6030e9c6e000000000016001434d14a23d2ba08d3e3edee9172f0c97f046266fb0247304402205fee57960883f6d69acf283192785f1147a3e11b97cf01a210cf7e9916500c040220483de1c51af5027440565caead6c1064bac92cb477b536e060f004c733c45128012102d12b6b907c5a1ef025d0924a29e354f6d7b1b11b5a7ddff94710d6f0042f3da800000000"
+
+#!/bin/bash
+
+WALLET_NAME="btrustwallet"
+
+# Ensure Bitcoin Core is running
+if ! bitcoin-cli -regtest getblockchaininfo >/dev/null 2>&1; then
+    bitcoind -regtest -daemon
+    sleep 5  # Wait for Bitcoin Core to start
+fi
+
+# Check if wallet exists, otherwise load it
+if ! bitcoin-cli -regtest listwallets | grep -q "$WALLET_NAME"; then
+    echo "⚠️ Loading wallet..."
+    bitcoin-cli -regtest loadwallet "$WALLET_NAME" || bitcoin-cli -regtest createwallet "$WALLET_NAME"
+fi
+
+# Set wallet flag to use fallback fee
+bitcoin-cli -regtest -rpcwallet="$WALLET_NAME" settxfee 0.00001 >/dev/null 2>&1
+
+# Check balance
+BALANCE=$(bitcoin-cli -regtest -rpcwallet="$WALLET_NAME" getbalance)
+if (( $(echo "$BALANCE < 1" | bc -l) )); then
+    echo "⚠️ Insufficient funds! Mining blocks and funding wallet..."
+    MINER_ADDR=$(bitcoin-cli -regtest getnewaddress)
+    bitcoin-cli -regtest generatetoaddress 101 "$MINER_ADDR"
+    RECEIVER=$(bitcoin-cli -regtest -rpcwallet="$WALLET_NAME" getnewaddress)
+    bitcoin-cli -regtest sendtoaddress "$RECEIVER" 1
+    bitcoin-cli -regtest generatetoaddress 1 "$MINER_ADDR"
+fi
+
+# Fetch an available UTXO
+UTXO=$(bitcoin-cli -regtest -rpcwallet="$WALLET_NAME" listunspent | jq -r '.[0]')
+if [ "$UTXO" == "null" ]; then
+    echo "❌ Error: No available UTXOs!"
+    exit 1
+fi
+txid=$(echo "$UTXO" | jq -r '.txid')
+vout=$(echo "$UTXO" | jq -r '.vout')
+
+# Destination address
+destination_address="2MvLcssW49n9atmksjwg2ZCMsEMsoj3pzUP"
+
+# Create raw transaction
+rawtx=$(bitcoin-cli -regtest -rpcwallet="$WALLET_NAME" createrawtransaction \
+    '[{"txid": "'"$txid"'", "vout": '"$vout"'}]' \
+    '[{"'"$destination_address"'": 0.2}]')
+
+echo "Raw Transaction: $rawtx"
+
+# Create PSBT with fallback fee
+psbt=$(bitcoin-cli -regtest -rpcwallet="$WALLET_NAME" walletcreatefundedpsbt \
+    '[]' '[{"'"$destination_address"'": 0.2}]' \
+    0 '{"subtractFeeFromOutputs":[0], "replaceable":true, "fee_rate": 10, "includeWatching": true}')
+
+echo "Partially Signed Transaction: $psbt"
+

submission/06.sh

@@ -1,2 +1,4 @@
 # What is the hash of this partially signed transaction?
 # transaction=cHNidP8BAHsCAAAAAhuVpgVRdOxkuC7wW2rvw4800OVxl+QCgezYKHtCYN7GAQAAAAD/////HPTH9wFgyf4iQ2xw4DIDP8t9IjCePWDjhqgs8fXvSIcAAAAAAP////8BigIAAAAAAAAWABTHctb5VULhHvEejvx8emmDCtOKBQAAAAAAAAAA
+bitcoin-cli -regtest decodepsbt cHNidP8BAHsCAAAAAhuVpgVRdOxkuC7wW2rvw4800OVxl+QCgezYKHtCYN7GAQAAAAD/////HPTH9wFgyf4iQ2xw4DIDP8t9IjCePWDjhqgs8fXvSIcAAAAAAP////8BigIAAAAAAAAWABTHctb5VULhHvEejvx8emmDCtOKBQAAAAAAAAAA
+#ea73a631b456d2b041ed73bf5767946408c6ff067716929a68ecda2e3e4de6d3

submission/07.sh

@@ -1,2 +1,4 @@
 # What is the receiver's address in this partially signed transaction?
 # transaction=cHNidP8BAHsCAAAAAhuVpgVRdOxkuC7wW2rvw4800OVxl+QCgezYKHtCYN7GAQAAAAD/////HPTH9wFgyf4iQ2xw4DIDP8t9IjCePWDjhqgs8fXvSIcAAAAAAP////8BigIAAAAAAAAWABTHctb5VULhHvEejvx8emmDCtOKBQAAAAAAAAAA
+bitcoin-cli -regtest decodepsbt cHNidP8BAHsCAAAAAhuVpgVRdOxkuC7wW2rvw4800OVxl+QCgezYKHtCYN7GAQAAAAD/////HPTH9wFgyf4iQ2xw4DIDP8t9IjCePWDjhqgs8fXvSIcAAAAAAP////8BigIAAAAAAAAWABTHctb5VULhHvEejvx8emmDCtOKBQAAAAAAAAAA
+#bcrt1qcaedd724gts3aug73m78c7nfsv9d8zs9znw8py