Network Upgrades and Forks
Documents hard forks, consensus changes, and coordinated network upgrades across Polygon's execution environments, including the PoS chain and zkEVM rollup. Covers activation mechanics, client version requirements, backward compatibility breaks, and the operational steps validators and infrastructure providers must take. Operators, exchanges, and wallet teams depend on this group for upgrade readiness, while risk teams assess the security implications of new code paths and state transitions.
Delhi Hard Fork
Technical reference for the Delhi upgrade on Polygon PoS. Covers the activation block, the deterministic minimum gas price formula replacing validator governance, and the impact on transaction fee predictability. Operators and dApp teams need to adjust gas estimation models and node configurations; Chainscore can provide an upgrade readiness review and fee-model impact assessment.
Indore Hard Fork
Documents the Indore upgrade decoupling validator commission rates from self-stake. Explains the new flexible commission model, migration mechanics for existing validators, and the economic re-evaluation required by stakers and delegators. Staking providers and wallet teams should review delegation UIs and reward calculations; Chainscore can audit staking contract interactions and commission logic.
Amoy Testnet Upgrade Path
Chronological map of protocol upgrades activated on the Amoy testnet before mainnet. Serves as a readiness checklist for infrastructure providers, detailing block numbers, client versions, and testing procedures. Teams should use this to validate compatibility in pre-production; Chainscore can assist with testnet integration testing and operational runbook development.
PoS Chain Block Reward and Emission Schedule Changes
Historical record of hard forks altering MATIC/POL block rewards, emission curves, and burn mechanisms including EIP-1559 implementation. Provides raw data and policy rationale for analysts modeling token supply and validator revenue. Exchanges and staking services need accurate emission data for reporting; Chainscore can perform economic impact analysis and supply audit verification.
State Sync and Checkpointing Protocol Upgrades
Covers upgrades to the Heimdall-to-Bor state sync mechanism and checkpoint submissions to Ethereum. Details changes to proposer selection, signature aggregation, and state sync event data structures. Critical for bridge operators and cross-chain application builders; Chainscore can review state sync integration logic and monitor checkpoint liveness.
Parallelization and Execution Engine Upgrades (Bor)
Documents Bor client upgrades introducing block parallelization, state trie optimizations, or EVM pipeline changes. Infrastructure providers must benchmark performance and manage new configuration parameters. Node operators need to assess hardware requirements and latency impacts; Chainscore can conduct performance benchmarking and configuration audits.
zkEVM Mainnet Beta Activation and Genesis
Historical record of the zkEVM mainnet launch, detailing the initial sequencer set, genesis state root, activated precompiles, and initial Security Council powers. Establishes the baseline trust assumptions for the rollup. Security auditors and integrators need this context for risk assessment; Chainscore can provide a genesis-state verification and trust-model analysis.
Etrog Upgrade
Canonical page for the Etrog upgrade adding pre-EIP-1559 transaction support, full opcode compatibility, and new cryptographic precompiles to the zkEVM. Explains breaking changes for tooling providers and new capabilities for complex dApp deployment. RPC providers and developer tools must update transaction parsing; Chainscore can audit smart contract compatibility and tooling integration.
Elderberry Upgrade
Documents the Elderberry upgrade's new state management model and its implications for prover performance and network throughput on the zkEVM. Key resource for understanding the rollup's scaling roadmap. Prover operators and infrastructure teams need to assess resource requirements; Chainscore can evaluate prover performance impacts and state transition correctness.
zkEVM Forced Batch and Censorship-Resistance Upgrades
Tracks upgrades strengthening the forced transaction inclusion mechanism, allowing users to submit L2 transactions directly via L1. Covers changes to the forced batch queue, fee models, and operational steps for censorship exit. Wallet teams and exchanges must implement forced-inclusion fallbacks; Chainscore can review forced-inclusion integration and test censorship-resistance guarantees.
Prover and Verifier Contract Upgrades
Security-critical page documenting every upgrade to the on-chain verifier smart contract and off-chain prover logic. Explains cryptographic changes including new proof systems and recursion patterns, plus trust assumptions during the upgrade process. Security auditors must verify each upgrade; Chainscore can provide verifier contract audit and proof-system migration review.
Timelock and Multi-Sig Upgrade Mechanics for zkEVM
Process-oriented page detailing the multi-signature scheme, timelock duration, and roles of the Security Council and Protocol Council in executing zkEVM contract upgrades. Provides a monitoring template for operators before, during, and after activation. Risk teams need to track upgrade authority and timelock parameters; Chainscore can build upgrade monitoring dashboards and governance alerting.
POL Token Migration and Staking Contract Upgrade
Comprehensive technical guide to the network-wide upgrade from MATIC to POL. Covers new staking contracts, the 1:1 migration path, expanded utility for multi-chain staking, and operational steps for exchanges, wallets, and stakers. Migration errors can cause reward loss; Chainscore can audit migration smart contracts and validate staking reward continuity.
Polygon 2.0 Architecture Rollout Phases
High-level map linking individual hard forks and contract upgrades to the broader Polygon 2.0 vision. Connects PoS chain upgrades, zkEVM maturation, AggLayer introduction, and POL migration into a strategic timeline. Protocol architects and investors need this roadmap for ecosystem-wide readiness planning; Chainscore can provide cross-upgrade impact assessment and dependency mapping.
Aggregation Layer (AggLayer) Component Upgrades
Documents upgrades to the AggLayer's core components including the bridge-and-call library and pessimistic proof mechanism. Covers how upgrades enable atomic cross-chain transactions between CDK chains and zkEVM. CDK chain operators must coordinate upgrades; Chainscore can review cross-chain message integrity and AggLayer integration security.
Polygon CDK Framework Version Upgrades
Tracks major, potentially breaking releases of the Chain Development Kit. Focuses on changes to sequencing, data availability interfaces, and settlement logic requiring coordinated hard forks for CDK appchains. Appchain operators need migration guidance; Chainscore can provide CDK upgrade readiness review and appchain fork coordination support.
Bridge Contract Upgrades (PoS Bridge and zkEVM Bridge)
Dedicated page for canonical bridge contracts on Ethereum. Documents upgrades changing validator set logic, slashing conditions, or asset custody models—the highest-risk operations in the ecosystem. Includes post-upgrade verification guide for security teams. Exchanges and custodians must validate bridge state after each upgrade; Chainscore can perform bridge security audits and post-upgrade state verification.