feat: poll committee for signatures #877
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## 🔄 Changes Summary Enable the AggSender to work with multiple validator nodes in a committee-based validation system. The implementation includes validator services, multisig committee management, certificate validation improvements, and enhanced gRPC communication protocols. **Multisig Committee Support:** - Added `MultisigCommittee` type to manage signer sets and enforce signature thresholds. - Signers are represented as `SignerInfo` structs with both address and URL for improved context and error reporting. - Committee construction validates non-empty membership and non-zero threshold, preventing misconfiguration. - Dynamic signer management: methods for adding signers, duplicate checks by address and URL. **Aggsender Validator Refactor:** - The Aggsender certificate validation flow was refactored to integrate multisig logic. - The multisig validation logic is applicable to both `PP` and `FEP` certificates. - Certificate validation now checks for contiguous certificates, last L2 block, and settlement status using new queries. - Import bridge exit proof verification is handled via new logic using `verifyClaimProofs`, ensuring only valid proofs pass. **Certificate Metadata removal:** - It is gone from the agglayer and therefore it is not sent anymore from the aggsender either. - Only thing worth noting is that, when calculating `CertificateID`, instead of metadata field, which was used previously, we now use `ZeroHash`. **Smart contracts integration:** - **AggchainFEP contract:** Removed querying of `TrustedSequencer` address and rely on the signers committee instead - **AggchainBase contract:** Retrieve the multisig committee from the `AggchainBase` contract **Agglayer integration:** - Invoke the `GetNetworkState` API from agglayer to get the latest settled imported bridge exit info. - Multisig is populated into the certificate and sent to the Agglayer's `SendCertificate` gRPC endpoint ##⚠️ Breaking Changes - 🛠️ **Config**: Make sure that `Mode` on the `Validator` and `AggSender` are the same. - 🔌 **API/CLI**: `aggkit` version (`v0.7.0`) that supports `multisig` will now require updated contracts to run. At least version `v12.1.0-rc.3` of `agglayer-contracts`, and a new version of `agglayer` which supports `multisig`, which is the `v0.4.0` of `agglayer`. - 🗑️ **Deprecated Features**: Aggsender Phase II validator signing logic ## 📋 Config Updates - Added `AggSender.RequireCommitteeMembershipCheck = false` parameter, which defines if a check on `aggsender proposer` startup will be performed to see if the proposer is in the `multisig` committee. - Added `Validator.RequireCommitteeMembershipCheck = {{AggSender.RequireCommitteeMembershipCheck}}` parameter, which defines if a check on `aggsender validator` startup will be performed to see if the validator is in the `multisig` committee. - Added `Validator.Mode = "PessimisticProof"` parameter, which acts the same as the `AggSender.Mode`. It tells the validator that the network is a `PP` network or an `FEP` network. It has to be the same as on `aggsender proposer`. - Added `Validator.FEPConfig.SovereignRollupAddr = "{{AggSender.SovereignRollupAddr}}" parameter which is the address of the `AggchainFEP` rollup on L1 for given network for which validator is running. - Added `Validator.FEPConfig.RequireNoBlockGap = {{AggSender.RequireNoFEPBlockGap}}, which acts the same as the given paremeter on `AggSender` (proposer) config, and tells the validator if gaps in blocks in certificates are allowed in `FEP` network. ```toml [AggSender] RequireCommitteeMembershipCheck = false [Validator] # PessimisticProof or AggchainProof Mode = "PessimisticProof" RequireCommitteeMembershipCheck = {{AggSender.RequireCommitteeMembershipCheck}} [Validator.FEPConfig] SovereignRollupAddr = "{{AggSender.SovereignRollupAddr}}" RequireNoBlockGap = "{{AggSender.RequireNoFEPBlockGap}}" ``` ## ✅ Testing - 🤖 **Automatic**: `aggkit` CI - 🖱️ **Manual**: [Optional: Steps to verify] ## 🐞 Issues - Closes #792 ## 🔗 Related PRs - #814 - #832 - #838 - #839 - #843 - #842 - #846 - #858 - #847 - #865 - #861 - #863 - #875 - #876 - #881 - #877 - #898 - #920 - #913 - #926 - #945 - #951 - #954 - #957 - #955 - #974 - #978 - #985 - #989 - #984 - #998 - #1017 - #1028 - #1034 - #1024 - #1052 - #1067 - #1068 - #1050 - #1071 - #1072 - #1060 - #1087 - #1077 - #1073 --------- Co-authored-by: Goran Rojovic <[email protected]> Co-authored-by: Goran Rojovic <[email protected]> Co-authored-by: Joan Esteban <[email protected]> Co-authored-by: Rachit Sonthalia <[email protected]> Co-authored-by: Arpit Temani <[email protected]> Co-authored-by: Copilot <[email protected]>
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🔄 Changes Summary
Intregrate multisig committee in the aggsender proposer. On each certificate submission, the aggsender proposer queries the smart contract for the actual committee and delegates the certificate validation to the validators and aggregates the signatures before sending them alongside with the certificate to the
agglayer.✅ Testing
🐞 Issues
📝 Notes
TODOs: