mirror of https://github.com/waku-org/nwaku.git
feat(rln-relay): multiple acceptable roots (#1177)
* feat(rln-relay): multiple acceptable roots * fix(rln-relay): make sure onchain handler uses correct proc * fix(rln-relay): typo * style(rln-relay): convert const to pascalcase * chore(rln-relay): address pr review * fix(rln-relay): add require to test * fix(rln-relay): add proc desc * fix(rln-relay): ensure that group id commitments were added correctly * fix(rln-relay): potential mem leak * style(rln-relay): comments * fix(rln-relay): magic number ambiguity * chore(rln-relay): comment Co-authored-by: Sanaz Taheri Boshrooyeh <35961250+staheri14@users.noreply.github.com> Co-authored-by: Sanaz Taheri Boshrooyeh <35961250+staheri14@users.noreply.github.com>
This commit is contained in:
Aaryamann Challani
GitHub
parent
1b4a9e5dfd
commit
37cd8b593b
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@ -2,7 +2,7 @@
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{.used.}
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import
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std/options, sequtils, times,
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std/options, sequtils, times, deques,
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testutils/unittests, chronos, chronicles, stint,
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stew/byteutils, stew/shims/net as stewNet,
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libp2p/crypto/crypto,
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@ -639,34 +639,39 @@ suite "Waku rln relay":
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check:
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verified.value() == false
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test "invalidate messages with a valid, but stale root":
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test "validate roots which are part of the acceptable window":
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# Setup:
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# This step consists of creating the rln instance,
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# This step consists of creating the rln instance and waku-rln-relay,
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# Inserting members, and creating a valid proof with the merkle root
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# create an RLN instance
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var rlnInstance = createRLNInstance()
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require:
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rlnInstance.isOk() == true
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rlnInstance.isOk()
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var rln = rlnInstance.value
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let rlnRelay = WakuRLNRelay(rlnInstance:rln)
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let
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# create a membership key pair
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memKeys = membershipKeyGen(rln).get()
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# peer's index in the Merkle Tree
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memKeys = membershipKeyGen(rlnRelay.rlnInstance).get()
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# peer's index in the Merkle Tree.
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index = 5
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let membershipCount = AcceptableRootWindowSize + 5
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# Create a Merkle tree with random members
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for i in 0..10:
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var memberIsAdded: bool = false
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for i in 0..membershipCount:
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var memberIsAdded: RlnRelayResult[void]
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if (i == index):
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# insert the current peer's pk
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memberIsAdded = rln.insertMember(memKeys.idCommitment)
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memberIsAdded = rlnRelay.insertMember(memKeys.idCommitment)
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else:
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# create a new key pair
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let memberKeys = rln.membershipKeyGen()
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memberIsAdded = rln.insertMember(memberKeys.get().idCommitment)
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# check the member is added
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check:
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memberIsAdded
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let memberKeys = rlnRelay.rlnInstance.membershipKeyGen()
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memberIsAdded = rlnRelay.insertMember(memberKeys.get().idCommitment)
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# require that the member is added
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require:
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memberIsAdded.isOk()
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# Given:
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# This step includes constructing a valid message with the latest merkle root
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@ -678,7 +683,7 @@ suite "Waku rln relay":
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debug "epoch in bytes", epochHex = epoch.toHex()
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# generate proof
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let validProofRes = rln.proofGen(data = messageBytes,
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let validProofRes = rlnRelay.rlnInstance.proofGen(data = messageBytes,
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memKeys = memKeys,
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memIndex = MembershipIndex(index),
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epoch = epoch)
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@ -687,38 +692,117 @@ suite "Waku rln relay":
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let validProof = validProofRes.value
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# validate the root (should be true)
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let verified = rln.validateRoot(validProof.merkleRoot)
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let verified = rlnRelay.validateRoot(validProof.merkleRoot)
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require:
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verified.isOk()
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verified.value() == true
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verified == true
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# When:
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# This test depends on the local merkle tree root being different than a
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# new message with an older/different root
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# This can be simulated by removing a member, which changes the root of the tree
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# Which is equivalent to a member being removed upon listening to the events emitted by the contract
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# Progress the local tree by removing a member
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discard rln.removeMember(MembershipIndex(0))
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# This test depends on the local merkle tree root being part of a
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# acceptable set of roots, which is denoted by AcceptableRootWindowSize
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# The following action is equivalent to a member being removed upon listening to the events emitted by the contract
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# Ensure the local tree root has changed
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let currentMerkleRoot = rln.getMerkleRoot()
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# Progress the local tree by removing members
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for i in 0..AcceptableRootWindowSize - 2:
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discard rlnRelay.removeMember(MembershipIndex(i))
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# Ensure the local tree root has changed
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let currentMerkleRoot = rlnRelay.rlnInstance.getMerkleRoot()
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require:
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currentMerkleRoot.isOk()
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currentMerkleRoot.value() != validProof.merkleRoot
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require:
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currentMerkleRoot.isOk()
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currentMerkleRoot.value() != validProof.merkleRoot
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# Then:
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# we try to verify a proof against this new merkle tree,
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# which should return false
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# Try to send a message constructed with an older root
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let olderRootVerified = rln.validateRoot(validProof.merkleRoot)
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require:
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olderRootVerified.isOk()
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# we try to verify a root against this window,
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# which should return true
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let olderRootVerified = rlnRelay.validateRoot(validProof.merkleRoot)
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check:
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olderRootVerified.value() == false
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olderRootVerified == true
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test "invalidate roots which are not part of the acceptable window":
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# Setup:
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# This step consists of creating the rln instance and waku-rln-relay,
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# Inserting members, and creating a valid proof with the merkle root
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require:
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AcceptableRootWindowSize < 10
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# create an RLN instance
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var rlnInstance = createRLNInstance()
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require:
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rlnInstance.isOk()
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var rln = rlnInstance.value
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let rlnRelay = WakuRLNRelay(rlnInstance:rln)
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let
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# create a membership key pair
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memKeys = membershipKeyGen(rlnRelay.rlnInstance).get()
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# peer's index in the Merkle Tree.
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index = 6
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let membershipCount = AcceptableRootWindowSize + 5
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# Create a Merkle tree with random members
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for i in 0..membershipCount:
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var memberIsAdded: RlnRelayResult[void]
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if (i == index):
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# insert the current peer's pk
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memberIsAdded = rlnRelay.insertMember(memKeys.idCommitment)
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else:
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# create a new key pair
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let memberKeys = rlnRelay.rlnInstance.membershipKeyGen()
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memberIsAdded = rlnRelay.insertMember(memberKeys.get().idCommitment)
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# require that the member is added
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require:
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memberIsAdded.isOk()
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# Given:
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# This step includes constructing a valid message with the latest merkle root
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# prepare the message
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let messageBytes = "Hello".toBytes()
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# prepare the epoch
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var epoch: Epoch
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debug "epoch in bytes", epochHex = epoch.toHex()
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# generate proof
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let validProofRes = rlnRelay.rlnInstance.proofGen(data = messageBytes,
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memKeys = memKeys,
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memIndex = MembershipIndex(index),
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epoch = epoch)
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require:
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validProofRes.isOk()
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let validProof = validProofRes.value
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# validate the root (should be true)
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let verified = rlnRelay.validateRoot(validProof.merkleRoot)
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require:
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verified == true
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# When:
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# This test depends on the local merkle tree root being part of a
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# acceptable set of roots, which is denoted by AcceptableRootWindowSize
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# The following action is equivalent to a member being removed upon listening to the events emitted by the contract
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# Progress the local tree by removing members
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for i in 0..AcceptableRootWindowSize:
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discard rlnRelay.removeMember(MembershipIndex(i))
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# Ensure the local tree root has changed
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let currentMerkleRoot = rlnRelay.rlnInstance.getMerkleRoot()
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require:
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currentMerkleRoot.isOk()
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currentMerkleRoot.value() != validProof.merkleRoot
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# Then:
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# we try to verify a proof against this window,
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# which should return false
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let olderRootVerified = rlnRelay.validateRoot(validProof.merkleRoot)
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check:
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olderRootVerified == false
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test "toEpoch and fromEpoch consistency check":
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# check edge cases
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@ -823,13 +907,15 @@ suite "Waku rln relay":
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doAssert(rlnInstance.isOk)
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var rln = rlnInstance.value
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# add members
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discard rln.addAll(groupIDCommitments)
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let
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wakuRlnRelay = WakuRLNRelay(membershipIndex: index,
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membershipKeyPair: groupKeyPairs[index], rlnInstance: rln)
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# add members
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let commitmentAddRes = wakuRlnRelay.addAll(groupIDCommitments)
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require:
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commitmentAddRes.isOk()
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# get the current epoch time
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let time = epochTime()
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@ -1,7 +1,7 @@
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{.push raises: [Defect].}
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import
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std/tables,
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std/[tables, deques],
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options, chronos, stint,
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web3,
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eth/keys,
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@ -9,23 +9,27 @@ import
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stew/arrayops,
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../../utils/protobuf
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const AcceptableRootWindowSize* = 5
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when defined(rln) or (not defined(rln) and not defined(rlnzerokit)):
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## Bn256 and RLN are Nim wrappers for the data types used in
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## the rln library https://github.com/kilic/rln/blob/3bbec368a4adc68cd5f9bfae80b17e1bbb4ef373/src/ffi.rs
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type Bn256* = pointer
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type RLN*[E] = pointer
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type RLNResult* = Result[RLN[Bn256], string]
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when defined(rlnzerokit):
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## RLN is a Nim wrapper for the data types used in zerokit RLN
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type RLN* {.incompleteStruct.} = object
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type RLNResult* = Result[ptr RLN, string]
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type RlnRelayResult*[T] = Result[T, string]
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type
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# identity key as defined in https://hackmd.io/tMTLMYmTR5eynw2lwK9n1w?view#Membership
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IDKey* = array[32, byte]
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# hash of identity key as defined ed in https://hackmd.io/tMTLMYmTR5eynw2lwK9n1w?view#Membership
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IDCommitment* = array[32, byte]
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type
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MerkleNode* = array[32, byte] # Each node of the Merkle tee is a Poseidon hash which is a 32 byte value
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Nullifier* = array[32, byte]
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Epoch* = array[32, byte]
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@ -121,6 +125,7 @@ when defined(rln) or (not defined(rln) and not defined(rlnzerokit)):
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# the log of nullifiers and Shamir shares of the past messages grouped per epoch
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nullifierLog*: Table[Epoch, seq[ProofMetadata]]
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lastEpoch*: Epoch # the epoch of the last published rln message
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validMerkleRoots*: Deque[MerkleNode] # An array of valid merkle roots, which are updated in a FIFO fashion
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when defined(rlnzerokit):
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type WakuRLNRelay* = ref object
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@ -143,6 +148,8 @@ when defined(rlnzerokit):
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contentTopic*: string
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# the log of nullifiers and Shamir shares of the past messages grouped per epoch
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nullifierLog*: Table[Epoch, seq[ProofMetadata]]
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validMerkleRoots*: Deque[MerkleNode] # An array of valid merkle roots, which are updated in a FIFO fashion
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type MessageValidationResult* {.pure.} = enum
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Valid, Invalid, Spam
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@ -1,9 +1,7 @@
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{.push raises: [Defect].}
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import
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std/sequtils, tables, times,
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std/streams,
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std/os,
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std/[sequtils, tables, times, streams, os, deques],
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chronicles, options, chronos, stint,
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confutils,
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web3, json,
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@ -24,13 +22,6 @@ import
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logScope:
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topics = "wakurlnrelayutils"
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when defined(rln) or (not defined(rln) and not defined(rlnzerokit)):
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type RLNResult* = Result[RLN[Bn256], string]
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when defined(rlnzerokit):
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type RLNResult* = Result[ptr RLN, string]
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type RlnRelayResult*[T] = Result[T, string]
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type MerkleNodeResult* = RlnRelayResult[MerkleNode]
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type RateLimitProofResult* = RlnRelayResult[RateLimitProof]
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type SpamHandler* = proc(wakuMessage: WakuMessage): void {.gcsafe, closure, raises: [Defect].}
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@ -400,16 +391,6 @@ when defined(rln) or (not defined(rln) and not defined(rlnzerokit)):
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var rootValue = cast[ptr MerkleNode] (root.`ptr`)[]
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return ok(rootValue)
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proc validateRoot*(rlnInstance: RLN[Bn256], merkleRoot: MerkleNode): RlnRelayResult[bool] =
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# Validate against the local merkle tree
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let localTreeRoot = rlnInstance.getMerkleRoot()
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if not localTreeRoot.isOk():
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return err(localTreeRoot.error())
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if localTreeRoot.value() == merkleRoot:
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return ok(true)
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else:
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return ok(false)
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proc proofVerify*(rlnInstance: RLN[Bn256], data: openArray[byte], proof: RateLimitProof): RlnRelayResult[bool] =
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var
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proofBytes = serialize(proof, data)
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@ -518,16 +499,6 @@ when defined(rlnzerokit):
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return proofBytes
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proc validateRoot*(rlnInstance: ptr RLN, proof: MerkleNode): RlnRelayResult[bool] =
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# Validate against the local merkle tree
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let localTreeRoot = rln.getMerkleRoot()
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if not localTreeRoot.isOk():
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return err(localTreeRoot.error())
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if localTreeRoot.value() == merkleRoot:
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return ok(true)
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else:
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return ok(false)
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proc proofVerify*(rlnInstance: ptr RLN, data: openArray[byte], proof: RateLimitProof): RlnRelayResult[bool] =
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var
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proofBytes = serialize(proof, data)
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@ -572,6 +543,44 @@ when defined(rlnzerokit):
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var rootValue = cast[ptr MerkleNode] (root.`ptr`)[]
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return ok(rootValue)
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proc updateValidRootQueue*(wakuRlnRelay: WakuRLNRelay, root: MerkleNode): void =
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## updates the valid Merkle root queue with the latest root and pops the oldest one when the capacity of `AcceptableRootWindowSize` is reached
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let overflowCount = wakuRlnRelay.validMerkleRoots.len() - AcceptableRootWindowSize
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if overflowCount >= 0:
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# Delete the oldest `overflowCount` elements in the deque (index 0..`overflowCount`)
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for i in 0..overflowCount:
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wakuRlnRelay.validMerkleRoots.popFirst()
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# Push the next root into the queue
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wakuRlnRelay.validMerkleRoots.addLast(root)
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proc insertMember*(wakuRlnRelay: WakuRLNRelay, idComm: IDCommitment): RlnRelayResult[void] =
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## inserts a new id commitment into the local merkle tree, and adds the changed root to the
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## queue of valid roots
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let actionSucceeded = wakuRlnRelay.rlnInstance.insertMember(idComm)
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if not actionSucceeded:
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return err("could not insert id commitment into the merkle tree")
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let rootAfterUpdate = ?wakuRlnRelay.rlnInstance.getMerkleRoot()
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wakuRlnRelay.updateValidRootQueue(rootAfterUpdate)
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return ok()
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proc removeMember*(wakuRlnRelay: WakuRLNRelay, index: MembershipIndex): RlnRelayResult[void] =
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## removes a commitment from the local merkle tree at `index`, and adds the changed root to the
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## queue of valid roots
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let actionSucceeded = wakuRlnRelay.rlnInstance.removeMember(index)
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if not actionSucceeded:
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return err("could not remove id commitment from the merkle tree")
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let rootAfterUpdate = ?wakuRlnRelay.rlnInstance.getMerkleRoot()
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wakuRlnRelay.updateValidRootQueue(rootAfterUpdate)
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return ok()
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proc validateRoot*(wakuRlnRelay: WakuRLNRelay, root: MerkleNode): bool =
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## Validate against the window of roots stored in wakuRlnRelay.validMerkleRoots
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return root in wakuRlnRelay.validMerkleRoots
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proc toMembershipKeyPairs*(groupKeys: seq[(string, string)]): seq[
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MembershipKeyPair] {.raises: [Defect, ValueError].} =
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## groupKeys is sequence of membership key tuples in the form of (identity key, identity commitment) all in the hexadecimal format
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@ -788,15 +797,9 @@ proc validateMessage*(rlnPeer: WakuRLNRelay, msg: WakuMessage,
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payload = string.fromBytes(msg.payload)
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return MessageValidationResult.Invalid
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let merkleRootIsValidRes = rlnPeer.rlnInstance.validateRoot(msg.proof.merkleRoot)
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if merkleRootIsValidRes.isErr():
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debug "invalid message: could not validate the root"
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return MessageValidationResult.Invalid
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if not merkleRootIsValidRes.value():
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debug "invalid message: received root does not match local root", payload = string.fromBytes(msg.payload)
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return MessageValidationResult.Invalid
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if not rlnPeer.validateRoot(msg.proof.merkleRoot):
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debug "invalid message: provided root does not belong to acceptable window of roots", provided=msg.proof.merkleRoot, validRoots=rlnPeer.validMerkleRoots
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return MessageValidationResult.Invalid
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# verify the proof
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let
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@ -854,25 +857,14 @@ proc appendRLNProof*(rlnPeer: WakuRLNRelay, msg: var WakuMessage,
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msg.proof = proof.value
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return true
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when defined(rln) or (not defined(rln) and not defined(rlnzerokit)):
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proc addAll*(rlnInstance: RLN[Bn256], list: seq[IDCommitment]): bool =
|
||||
# add members to the Merkle tree of the `rlnInstance`
|
||||
for i in 0..list.len-1:
|
||||
let member = list[i]
|
||||
let member_is_added = rlnInstance.insertMember(member)
|
||||
if not member_is_added:
|
||||
return false
|
||||
return true
|
||||
|
||||
when defined(rlnzerokit):
|
||||
proc addAll*(rlnInstance: ptr RLN, list: seq[IDCommitment]): bool =
|
||||
# add members to the Merkle tree of the `rlnInstance`
|
||||
for i in 0..list.len-1:
|
||||
let member = list[i]
|
||||
let member_is_added = rlnInstance.insertMember(member)
|
||||
if not member_is_added:
|
||||
return false
|
||||
return true
|
||||
proc addAll*(wakuRlnRelay: WakuRLNRelay, list: seq[IDCommitment]): RlnRelayResult[void] =
|
||||
# add members to the Merkle tree of the `rlnInstance`
|
||||
for i in 0..list.len-1:
|
||||
let member = list[i]
|
||||
let memberAdded = wakuRlnRelay.insertMember(member)
|
||||
if not memberAdded.isOk():
|
||||
return err(memberAdded.error())
|
||||
return ok()
|
||||
|
||||
# the types of inputs to this handler matches the MemberRegistered event/proc defined in the MembershipContract interface
|
||||
type RegistrationEventHandler = proc(pubkey: Uint256, index: Uint256): void {.gcsafe, closure, raises: [Defect].}
|
||||
|
|
@ -986,12 +978,6 @@ proc mountRlnRelayStatic*(node: WakuNode,
|
|||
doAssert(rlnInstance.isOk)
|
||||
var rln = rlnInstance.value
|
||||
|
||||
# add members to the Merkle tree
|
||||
for index in 0..group.len-1:
|
||||
let member = group[index]
|
||||
let member_is_added = rln.insertMember(member)
|
||||
doAssert(member_is_added)
|
||||
|
||||
# create the WakuRLNRelay
|
||||
var rlnPeer = WakuRLNRelay(membershipKeyPair: memKeyPair,
|
||||
membershipIndex: memIndex,
|
||||
|
|
@ -999,6 +985,12 @@ proc mountRlnRelayStatic*(node: WakuNode,
|
|||
pubsubTopic: pubsubTopic,
|
||||
contentTopic: contentTopic)
|
||||
|
||||
# add members to the Merkle tree
|
||||
for index in 0..group.len-1:
|
||||
let member = group[index]
|
||||
let memberAdded = rlnPeer.insertMember(member)
|
||||
doAssert(memberAdded.isOk())
|
||||
|
||||
# adds a topic validator for the supplied pubsub topic at the relay protocol
|
||||
# messages published on this pubsub topic will be relayed upon a successful validation, otherwise they will be dropped
|
||||
# the topic validator checks for the correct non-spamming proof of the message
|
||||
|
|
@ -1077,9 +1069,9 @@ proc mountRlnRelayDynamic*(node: WakuNode,
|
|||
debug "a new key is added", pubkey=pubkey
|
||||
# assuming all the members arrive in order
|
||||
let pk = pubkey.toIDCommitment()
|
||||
let isSuccessful = rlnPeer.rlnInstance.insertMember(pk)
|
||||
let isSuccessful = rlnPeer.insertMember(pk)
|
||||
debug "received pk", pk=pk.toHex, index =index
|
||||
doAssert(isSuccessful)
|
||||
doAssert(isSuccessful.isOk())
|
||||
|
||||
asyncSpawn rlnPeer.handleGroupUpdates(handler)
|
||||
debug "dynamic group management is started"
|
||||
|
|
|
|||
Loading…
Reference in New Issue