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e9c98ab822
* lnproxy: check if payment hashes match #3636 * go update to 1.19.5 and verify checkums * add lnproxy install script * add lnproxy-webui * pin versions and fix formatting * add nginx configs for lnproxy
54 lines
1.4 KiB
Python
54 lines
1.4 KiB
Python
#!/usr/bin/env python3
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# adapted from: https://github.com/lnproxy/lnproxy-cli/blob/fe18d16e42b58f635b94c7da59a34d5e092e4d56/check-wrap.py
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# Parses payment hashes and amounts in bolt11 invoices to check lnproxy
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# Can skip most bolt11 checks since both the user's wallet and lnproxy will do that
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from decimal import Decimal
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CHARSET = "qpzry9x8gf2tvdw0s3jn54khce6mua7l"
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units = {
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'p': 10**12,
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'n': 10**9,
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'u': 10**6,
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'm': 10**3,
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}
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def parse(invoice):
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invoice = invoice.lower()
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pos = invoice.rfind('1')
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amount = invoice[4:pos]
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if amount == '':
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amount = Decimal(0)
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else:
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amount = Decimal(amount[:-1]) / units[amount[-1]]
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data = invoice[pos+1+7:]
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i = 0
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while i < len(data):
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if data[i] == 'p' and data[i+1:i+1+2] == 'p5':
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payment_hash = data[i+1+2:i+1+2+52]
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break
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else:
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i += 3 + CHARSET.find(data[i+1]) * 32 + CHARSET.find(data[i+1+1])
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return (amount, payment_hash)
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from sys import stderr, argv
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try:
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if len(argv) != 3:
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raise Exception("Incorrect number of arguments")
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amt1, hash1 = parse(argv[1])
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amt2, hash2 = parse(argv[2])
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if hash1 != hash2:
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print(f"Payment hashes do not match!", file=stderr)
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exit(3)
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if amt1 != Decimal(0):
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print(f"Hashes match, routing fee is {(amt2-amt1)*10**8:0,.0f} sat ({(amt2-amt1)/amt1*100:0.2f}%)")
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else:
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print(f"Hashes match")
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except Exception as err:
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print('Error:', err)
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print(f"usage: {argv[0]} <original invoice> <wrapped invoice>", file=stderr)
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exit(2)
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