Signature creation in Python3

Russw_ on 20211029 @01:00am EST said:

GOT IT! This works for me:

basicSpendBundle = await alice.spend_coin(testcoin, pushtx = False, args = spendArgs)

// assemble the aggregated BLS signatures on their own...

//  - in this case there is only 1 sig, so `aggSig == sig1`, and `AugScheme.MPL.aggregate` is

//    not actually needed here... but just add more to sigs when needed

privateKey = alice.sk()

messageToSign = clvm.casts.int_to_bytes(msg_id)

sig1 = blspy.AugSchemeMPL.sign(privateKey, messageToSign)

sigs = [sig1]                                # not actually needed with a single sig

aggSig = blspy.AugSchemeMPL.aggregate(sigs)  # not actually needed with a single sig

//This is the way to make the combined spend...

// - clean separation between assembling the Coin spends and the agg sigs works well

combinedSpend = cdv.test.SpendBundle(coinSpends, aggSig)  # in this single sig case, sig1 would be fine here

//verify both (even though sig1 and combinedSpend.aggregated_signature are the same in this case)

assert blspy.AugSchemeMPL.verify(alice.pk_, messageToSign, sig1)

assert blspy.AugSchemeMPL.verify(alice.pk_, messageToSign, combinedSpend.aggregated_signature)

result = await network.push_tx(combinedSpend)

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