Bridge validator threshold (k-of-M)
Axelar Network's assessment for RD-F-149 — scored yellow on the v1.7.0 rubric. The evidence below is the curator's reasoning for this score.
Evidence summary #
60% weighted quorum for cross-chain operation enabling (minimum quorum 0.6 from total consensus weight); 2/3 (~67%) for block finality on the Cosmos chain. Quadratic weighting (sqrt(stake)) moderates concentration. The EVM-side AxelarAuthWeighted uses a weighted threshold where weight >= threshold triggers approval. Threshold is governance-configurable. Yellow because 60% threshold means a coordinated attack by validators controlling >40% of weighted voting power could block or compromise operations — meaningful but non-trivial attack complexity for a live PoS network.
Sources #
- GitHubAxelarAuthWeighted.sol threshold logicAxelarAuthWeighted.sol _validateSignatures() — weight accumulation until weight >= threshold; threshold passed as parameter from governance-controlled operatorshipretrieved 2026-05-17
- Axelar TSS stake accounting blogWebSearch result citing Axelar docs: 'minimum validator quorum (0.6 from total consensus weight) required for EVM chain cross-chain operations'retrieved 2026-05-17
Methodology #
Read the signature threshold required to approve a cross-chain message (for non-LZ bridges).
See the full factor methodology and distribution across all protocols →