I need to check if a transaction is valid, and that includes verifying its signature. But here’s the catch: I can’t rely on pre-made Bitcoin tools. Instead, I’ll have to write my own code using Python libraries.
transaction data:
{
"version": 1,
"locktime": 0,
"vin": [
{
"txid": "3b7dc918e5671037effad7848727da3d3bf302b05f5ded9bec89449460473bbb",
"vout": 16,
"prevout": {
"scriptpubkey": "0014f8d9f2203c6f0773983392a487d45c0c818f9573",
"scriptpubkey_asm": "OP_0 OP_PUSHBYTES_20 f8d9f2203c6f0773983392a487d45c0c818f9573",
"scriptpubkey_type": "v0_p2wpkh",
"scriptpubkey_address": "bc1qlrvlygpudurh8xpnj2jg04zupjqcl9tnk5np40",
"value": 37079526
},
"scriptsig": "",
"scriptsig_asm": "",
"witness": [
"30440220780ad409b4d13eb1882aaf2e7a53a206734aa302279d6859e254a7f0a7633556022011fd0cbdf5d4374513ef60f850b7059c6a093ab9e46beb002505b7cba0623cf301",
"022bf8c45da789f695d59f93983c813ec205203056e19ec5d3fbefa809af67e2ec"
],
"is_coinbase": false,
"sequence": 4294967295
}
],
"vout": [
{
"scriptpubkey": "76a9146085312a9c500ff9cc35b571b0a1e5efb7fb9f1688ac",
"scriptpubkey_asm": "OP_DUP OP_HASH160 OP_PUSHBYTES_20 6085312a9c500ff9cc35b571b0a1e5efb7fb9f16 OP_EQUALVERIFY OP_CHECKSIG",
"scriptpubkey_type": "p2pkh",
"scriptpubkey_address": "19oMRmCWMYuhnP5W61ABrjjxHc6RphZh11",
"value": 100000
},
{
"scriptpubkey": "0014ad4cc1cc859c57477bf90d0f944360d90a3998bf",
"scriptpubkey_asm": "OP_0 OP_PUSHBYTES_20 ad4cc1cc859c57477bf90d0f944360d90a3998bf",
"scriptpubkey_type": "v0_p2wpkh",
"scriptpubkey_address": "bc1q44xvrny9n3t5w7lep58egsmqmy9rnx9lt6u0tc",
"value": 36977942
}
]
}
