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Test/mint_add_verification_balance (#373)

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* add verification balance

* verify input and outputs amounts before flow

* adjust tests
This commit is contained in:
callebtc
2023-12-02 18:55:19 +01:00
committed by GitHub
parent bb51567e72
commit 0ec3af9bf1
5 changed files with 102 additions and 35 deletions
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53
cashu/mint/ledger.py
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@@ -473,8 +473,32 @@ class Ledger(LedgerVerification, LedgerSpendingConditions, LedgerLightning):
try:
# verify spending inputs, outputs, and spending conditions
await self.verify_inputs_and_outputs(proofs, outputs)
# Mark proofs as used and prepare new promises
await self._invalidate_proofs(proofs)
# BEGIN backwards compatibility < 0.13.0
if amount is not None:
logger.debug(
"Split: Client provided `amount` - backwards compatibility response"
" pre 0.13.0"
)
# split outputs according to amount
total = sum_proofs(proofs)
if amount > total:
raise Exception("split amount is higher than the total sum.")
outs_fst = amount_split(total - amount)
B_fst = [od for od in outputs[: len(outs_fst)]]
B_snd = [od for od in outputs[len(outs_fst) :]]
# Mark proofs as used and prepare new promises
await self._invalidate_proofs(proofs)
prom_fst = await self._generate_promises(B_fst, keyset)
prom_snd = await self._generate_promises(B_snd, keyset)
promises = prom_fst + prom_snd
# END backwards compatibility < 0.13.0
else:
# Mark proofs as used and prepare new promises
await self._invalidate_proofs(proofs)
promises = await self._generate_promises(outputs, keyset)
except Exception as e:
logger.trace(f"split failed: {e}")
raise e
@@ -482,31 +506,6 @@ class Ledger(LedgerVerification, LedgerSpendingConditions, LedgerLightning):
# delete proofs from pending list
await self._unset_proofs_pending(proofs)
# BEGIN backwards compatibility < 0.13.0
if amount is not None:
logger.debug(
"Split: Client provided `amount` - backwards compatibility response pre"
" 0.13.0"
)
# split outputs according to amount
total = sum_proofs(proofs)
if amount > total:
raise Exception("split amount is higher than the total sum.")
outs_fst = amount_split(total - amount)
B_fst = [od for od in outputs[: len(outs_fst)]]
B_snd = [od for od in outputs[len(outs_fst) :]]
# generate promises
prom_fst = await self._generate_promises(B_fst, keyset)
prom_snd = await self._generate_promises(B_snd, keyset)
promises = prom_fst + prom_snd
# END backwards compatibility < 0.13.0
else:
promises = await self._generate_promises(outputs, keyset)
# verify amounts in produced promises
self._verify_equation_balanced(proofs, promises)
logger.trace("split successful")
return promises