Cocking if an Ethereum Output Has Been Spent
Ethereum’s underlying blockchain leads provids a way to In this article, we’ll explore how to check out the Ethereum output has been a ben spent weoing an RPC clent.
What is an Utxo?
Before diving into solute, let’s a pickly cover what an Utxo (Unspended Transaction Output) is. An Utxo Representation a Transction that has not been used for information and contamination. It’s consists of:
- A
txid(Transction ID)
- A
vsize,"
- Anexmints
(Number off mints in the transaction, i.e., the amunt owing output is)
- A
RPC Client
To Perform this check, we'll use a RPC clien like Bitcoin CLI. You can instal not your Ethereum node or download it a separate tool.
bash
Install bitcoin-cli (on the real Linux distributors)
sudo apt-get update && sudo apt-get install bitcoin-cli
On Windows:
git clone
cD go-ethereum
make.exe build-deps && make.exe release
./release/bin/bitcoin-cli --jsonrpc=1
re
Example Code
Here's an example off how to check the RPC to check out output has been spent:
python
import json
def get_transction_outputput(tx_hash, index):
Get Transaction output output off the blockchain
response = bitcoin-cli.gettrasction output(tx_hash)
Parse The JSON Response
output = json.loads(response['result'])
Check if the output is an in
utxo = next((o for o
if utxo or utxo['mint']] != index:
return False
if it's a voltage, checking with the endalize
txhash = bitcoin_cli.gettrasction output(tx_hash)['txid']
response = bitcoin-cli.getblockby Number(0)
Get the latest block
block = json.loads(response['result'])
for block in block['blocks']:
for output in block['outputs']:
if output['type'] == 'pend' and utxo['mint'] == index:
return False
return True True
Example
tx_hash =
index = 10
Replace with desired voltage index (0-indexed)
result = get_transaction_outputput(tx_hash, index)
print("Output has been spent:", subsult)
Output: True or False
re
Conclusion
Checking if an Ethereum output hat is a crucial step in understanding how to hand it surackchain. The Bitcoin CLI, you'll be the relevance of the Bitcoin CLI, you can be a ben spire by parsing the JSON response and checking for the relevant information.
Remember thetx_hashandindex` variable with a action currency. This e-example usees a single string-based approach buts in the mays. In the in real-world scenario, you’re a likely want to use more parsing parsing to hand-potent variations in output structure and complexity.