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refactor: HTLC spending conditions (#803)

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* refactor nut14

* format

* tests

* update tests

* more tests

* format

* adjust wallet tests -> 32 bytes preimages

* format
This commit is contained in:
lollerfirst
2025-10-21 16:37:51 +02:00
committed by GitHub
parent 23683f5985
commit f84028ca3f
4 changed files with 146 additions and 71 deletions
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88
tests/mint/test_mint_htlc.py Normal file
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from cashu.core.base import Proof
from cashu.core.errors import TransactionError
from cashu.core.nuts.nut14 import verify_htlc_spending_conditions
def test_htlc():
proof = Proof.from_dict({
"amount": 0,
"secret": "[\"HTLC\",{\"nonce\":\"66687aadf862bd776c8fc18b8e9f8e20089714856ee233b3902a591d0d5f2925\",\"data\":\"4884fdaafea47c29fea7159d0daddd9c085d6200e1359e85bb81736af6b7c837\"}]",
"C": "02698c4e2b5f9534cd0687d87513c759790cf829aa5739184a3e3735471fbda904",
"id": "009a1f293253e41e",
"witness": "{\"preimage\":\"0123456789abcdef0123456789abcdef0123456789abcdef0123456789abcdef\"}"
})
print(f"{proof.secret = }")
htlc_preimage = proof.htlcpreimage
assert htlc_preimage
verify_htlc_spending_conditions(proof)
def test_htlc_case_insensitive():
proof = Proof.from_dict({
"amount": 0,
"secret": "[\"HTLC\",{\"nonce\":\"66687aadf862bd776c8fc18b8e9f8e20089714856ee233b3902a591d0d5f2925\",\"data\":\"4884fdaafea47c29fea7159d0daddd9c085d6200e1359e85bb81736af6b7c837\"}]",
"C": "02698c4e2b5f9534cd0687d87513c759790cf829aa5739184a3e3735471fbda904",
"id": "009a1f293253e41e",
"witness": "{\"preimage\":\"0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF\"}"
})
htlc_preimage = proof.htlcpreimage
assert htlc_preimage
verify_htlc_spending_conditions(proof)
def test_invalid_preimage():
proof = Proof.from_dict({
"amount": 0,
"secret": "[\"HTLC\",{\"nonce\":\"72996563049cc84daa2c3f31fd5c3d10770e69d6ebbb8da5b6d76db303dbae43\",\"data\":\"c2f480d4dda9f4522b9f6d590011636d904accfe59f12f9d66a0221c2558e3a2\"}]",
"C": "02698c4e2b5f9534cd0687d87513c759790cf829aa5739184a3e3735471fbda904",
"id": "009a1f293253e41e",
"witness": "{\"preimage\":\"0123456789abcdef0123456789abcdef0123456789abcdef0123456789abcdef\"}"
})
htlc_preimage = proof.htlcpreimage
assert htlc_preimage
try:
verify_htlc_spending_conditions(proof)
assert False, "Expected a TransactionError"
except TransactionError as e:
assert "HTLC preimage does not match." in e.detail
def test_htlc_preimage_too_large():
proof = Proof.from_dict({
"amount": 0,
"secret": "[\"HTLC\",{\"nonce\":\"66687aadf862bd776c8fc18b8e9f8e20089714856ee233b3902a591d0d5f2925\",\"data\":\"c2f480d4dda9f4522b9f6d590011636d904accfe59f12f9d66a0221c2558e3a2\"}]",
"C": "02698c4e2b5f9534cd0687d87513c759790cf829aa5739184a3e3735471fbda904",
"id": "009a1f293253e41e",
"witness": "{\"preimage\":\"cccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccc\"}"
})
htlc_preimage = proof.htlcpreimage
assert htlc_preimage
try:
verify_htlc_spending_conditions(proof)
assert False, "Expected a TransactionError"
except TransactionError as e:
assert "HTLC preimage must be 64 characters hex." in e.detail
def test_htlc_nonhex_preimage():
proof = Proof.from_dict({
"amount": 0,
"secret": "[\"HTLC\",{\"nonce\":\"66687aadf862bd776c8fc18b8e9f8e20089714856ee233b3902a591d0d5f2925\",\"data\":\"72996563049cc84daa2c3f31fd5c3d10770e69d6ebbb8da5b6d76db303dbae43\"}]",
"C": "02698c4e2b5f9534cd0687d87513c759790cf829aa5739184a3e3735471fbda904",
"id": "009a1f293253e41e",
"witness": "{\"preimage\":\"zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz\"}"
})
htlc_preimage = proof.htlcpreimage
assert htlc_preimage
try:
verify_htlc_spending_conditions(proof)
assert False, "Expected a TransactionError"
except TransactionError as e:
assert "invalid preimage for HTLC: not a hex string." in e.detail