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truncate entropy to 31 bytes, otherwise it might be > than mod

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Dmitriy Ryajov 2024-01-16 20:30:11 -06:00
parent 09d20e06e6
commit b33ddb347b
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1 changed files with 4 additions and 3 deletions
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7
codex/slots/sampler/sampler.nim
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@ -18,6 +18,7 @@ import pkg/constantine/math/arithmetic
import pkg/poseidon2
import pkg/poseidon2/types
import pkg/poseidon2/io
import pkg/stew/arrayops
import ../../market
import ../../blocktype as bt
@ -86,9 +87,9 @@ proc getProofInput*(
## Generate proofs as input to the proving circuit.
##
without entropy =? Poseidon2Hash.fromBytes(entropy):
error "Failed to parse entropy"
return failure("Failed to parse entropy")
let
entropy = Poseidon2Hash.fromBytes(
array[31, byte].initCopyFrom(entropy[0..30])) # truncate to 31 bytes, otherwise it _might_ be greater than mod
without verifyTree =? self.builder.verifyTree and
verifyProof =? verifyTree.getProof(self.index) and