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temp fix: little endian pedersen_hash #103

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merged 2 commits into from
Jun 3, 2022
Merged

temp fix: little endian pedersen_hash #103

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8307988
temp fix: little endian pedersen_hash
gballet Jun 2, 2022
cbe86f9
adapt test
gballet Jun 2, 2022
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12 changes: 11 additions & 1 deletion trie/utils/verkle.go
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Original file line number Diff line number Diff line change
Expand Up @@ -70,7 +70,17 @@ func GetTreeKey(address []byte, treeIndex *uint256.Int, subIndex byte) []byte {

cfg, _ := verkle.GetConfig()
ret := cfg.CommitToPoly(poly[:], 0)
retb := ret.Bytes()

// The output of Byte() is big engian for banderwagon. This
// introduces an inbalance in the tree, because hashes are
// elements of a 253-bit field. This means more than half the
// tree would be empty. To avoid this problem, use a little
// endian commitment and chop the MSB.
var retb [32]byte
retb = ret.Bytes()
for i := 0; i < 16; i++ {
retb[31-i], retb[i] = retb[i], retb[31-i]
}
retb[31] = subIndex
return retb[:]

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2 changes: 1 addition & 1 deletion trie/verkle_test.go
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Expand Up @@ -386,7 +386,7 @@ func TestReproduceCondrieuPoAStemConflictWithAnotherStem(t *testing.T) {

func TestGetTreeKeys(t *testing.T) {
addr := common.Hex2Bytes("71562b71999873DB5b286dF957af199Ec94617f7")
target := common.Hex2Bytes("0e19316be898a50719b7c321005583ddab6398f4e568d8efafb0619609700f00")
target := common.Hex2Bytes("e00f70099661b0afefd868e5f49863abdd83550021c3b71907a598e86b311900")
key := utils.GetTreeKeyVersion(addr)
t.Logf("key=%x", key)
t.Logf("actualKey=%x", target)
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