There are just a few points with the offered Bash script for creating and signing a Bitcoin transaction utilizing bitcoin-cli.
This is an in depth breakdown of the issues and instructed fixes:
Non-public Key Format:
Problem: The PRIVATE_KEY_1 and PRIVATE_KEY_2 are offered as 64-character hexadecimal strings. Nevertheless, bitcoin-cli expects personal keys in Pockets Import Format (WIF), which usually begins with a Ok, L, or 5 and is Base58 encoded.
Repair: Convert the hexadecimal personal keys to WIF format. You need to use instruments like bitcoin-tool or on-line converters, however make sure you’re working in a safe atmosphere to guard the keys.
Instance Conversion Utilizing bitcoin-cli:
# Convert HEX to WIF for PRIVATE_KEY_1
WIF_PRIVATE_KEY_1=$(bitcoin-cli -regtest dumpprivkey )
# Convert HEX to WIF for PRIVATE_KEY_2
WIF_PRIVATE_KEY_2=$(bitcoin-cli -regtest dumpprivkey )
Substitute
Invalid INPUT_TXID:
Problem: The INPUT_TXID is about to all zeroes (0000…0000), which isn’t a sound transaction ID. It will trigger the createrawtransaction command to fail as a result of it references a non-existent transaction.
Repair: Use a sound transaction ID out of your blockchain (particularly because you’re working in regtest, make sure the transaction exists there).
Instance:
INPUT_TXID="your_valid_txid_here"
ScriptPubKey Format:
Problem: The REDEEM_SCRIPT_HEX offered appears to be meant for a multisig setup, however guarantee it matches the precise script of the UTXO you are attempting to spend.
Repair: Confirm that the REDEEM_SCRIPT_HEX corresponds appropriately to the locking script of the UTXO. If it is a normal P2SH or P2WSH script, make sure the format aligns with anticipated patterns.
Deprecated signrawtransactionwithkey Command:
Problem: Relying in your bitcoin-cli model, the signrawtransactionwithkey command is likely to be deprecated.
Repair: Use signrawtransactionwithkey if supported. In any other case, think about using signrawtransactionwithwallet or updating your script based on the most recent bitcoin-cli documentation.
Output Tackle Validation:
Problem: The OUTPUT_ADDRESS begins with 3, which is not a normal prefix on regtest. On regtest, addresses sometimes begin with completely different characters.
Regtest Prefixes:
Legacy addresses begin with: m or n
P2SH addresses begin with: 2
Bech32 addresses begin with: bcrt1
The deal with 325UUecEQuyrTd28Xs2hvAxdAjHM7XzqVF
does NOT conform to plain regtest deal with codecs.
Repair: Make sure the OUTPUT_ADDRESS is a sound deal with on your regtest atmosphere. You may generate a brand new deal with utilizing:
# Generate a brand new legacy deal with in regtest
bitcoin-cli -regtest getnewaddress "" legacy
# Generate a brand new P2SH deal with in regtest
bitcoin-cli -regtest getnewaddress "" p2sh
# Generate a brand new bech32 deal with in regtest
bitcoin-cli -regtest getnewaddress "" bech32
Substitute the deal with 325UUecEQuyrTd28Xs2hvAxdAjHM7XzqVF with an deal with generated straight out of your regtest Bitcoin node utilizing the instructions above.
Dependencies and Instruments:
Problem: The script makes use of jq to parse JSON. Be sure that jq is put in in your system.
Repair: Set up jq if it is not already current.
# sudo apt-get set up jq
Sequence Quantity Utilization:
Problem: The SEQUENCE is about to 0xffffffff, which is the default and won’t be needed until you are implementing particular options like Substitute-By-Price (RBF).
Repair: If not wanted, you’ll be able to omit the sequence area within the enter object.
General Script Enhancements:
Safety: Keep away from hardcoding personal keys in scripts. Think about using atmosphere variables or safe key administration programs.
Error Dealing with: Add checks to make sure every command executes efficiently earlier than continuing to the subsequent step. This may help in debugging points extra successfully.
Instance:
# Create uncooked transaction
UNSIGNED_TX=$(bitcoin-cli -regtest -rpcuser=alice -rpcpassword=password createrawtransaction '[{"txid":"'$INPUT_TXID'","vout":'$INPUT_VOUT'}]' '{"'$OUTPUT_ADDRESS'":'$VALUE'}')
if [ $? -ne 0 ]; then
echo "Did not create uncooked transaction."
exit 1
fi
# Signal transaction
SIGNED_TX=$(bitcoin-cli -regtest -rpcuser=alice -rpcpassword=password signrawtransactionwithkey "$UNSIGNED_TX" '["'$WIF_PRIVATE_KEY_1'", "'$WIF_PRIVATE_KEY_2'"]' '[{"txid":"'$INPUT_TXID'","vout":'$INPUT_VOUT',"scriptPubKey":"'$REDEEM_SCRIPT_HEX'","redeemScript":"'$REDEEM_SCRIPT_HEX'"}]')
if [ $? -ne 0 ]; then
echo "Did not signal transaction."
exit 1
fi
By addressing these points, your script ought to perform appropriately in creating and signing a Bitcoin transaction inside your regtest atmosphere.
