Arbitrum v2.0.0 Nitro Beta 1

This release breaks compatibility with the old devnet and adds support for a new anytrust network.

User-facing Improvements

• Add a new node interface method for splitting gas estimation results into their component parts: #648
• Add extra fields to tracing to track transfers done outside of EVM execution: #664
• Add an isSpent method to the outbox: #720

Internal Highlights

• At-cost L1 gas pricing: #585
• Wasm testsuite: #586
• feat: efficient merkleprooflib saves 100s gas: #624
• Change retryable refund calculation: #654
• Remove old ArbOS versions and their behaviors: #683
• Genesisblock in chainconfig and arbos-state: #691
• Add new anytrust chain config defaults: #721

Full Changelog: v2.0.0-alpha.5...v2.0.0-beta.1

Consensus V2

This release signifies a consensus version, and is not necessarily a good version to run a node on

WAVM Module Root: 0xee16b2358c81be2b9feb8486f052e74f18b8a790e4e77b4dc9e4f34d71d3b4c0

This contains the following consensus changes from consensus v1:

• Fix L1 pricing updates when a batch posting report arrives with the current timestamp: #728

Consensus V1 Release Candidate 1

This release signifies a consensus version, and is not necessarily a good version to run a node on

WAVM Module Root: 0xbb9d58e9527566138b682f3a207c0976d5359837f6e330f4017434cca983ff41

This is the first release candidate for the first finalized state transition version, breaking compatibility with the existing devnet consensus.

Arbitrum v2.0.0 Nitro Alpha 5

This release adds a number of AnyTrust improvements and features.

• Replace Retrieve API method which required passing a Data Availablity Certificate as the argument, with GetByHash which only needs the data hash.
• REST server option for daserver for serving GetByHash requests, additional to the existing RPC server.
• New storage modes! In addition to local disk file mode, there are now S3 and local disk database storage modes, see options starting with --data-availability.local-file-storage, --data-availablility.s3-storage, and --data-availability.local-db-storage
• In-memory caching mode, see --data-availability.local-cache
• Documentation in daserver-instructions updated with samples for how to run daserver as both a mirror and as a committee member.
• REST and RPC health checks for daserver.
• daserver can fall back to fetching from REST endpoints if it is missing a data hash, see the options under --data-availability.rest-aggregator. If it is able to retrieve from a REST endpoint, then it stores it locally. --data-availability.rest-aggregator.online-url-list allows fetching from a URL which contains a list of URLs, which can reference other lists so multiple parties can maintain mirror lists.

Arbitrum v2.0.0 Nitro Alpha 4

• Adds initial support for Arbitrum AnyTrust chains

Devnet Consensus V3.1

This release signifies a consensus version, and is not necessarily a good version to run a node on

WASM Module Root: 0x3d946791b42cc1069694cfab9feedc5d5ccd36cb792a2a7ed57b8cba412f65ac

This contains the following consensus changes from devnet consensus v3:

• Add support for devnet anytrust chain: #602

Arbitrum v2.0.0 Nitro Alpha 3

• Consensus change: Fix and improve gas price updates #551 #553
• Add arbdebug RPCs and new NodeInterfaceDebug #542
• Improve inbox reading and block creation logging #537

Devnet Consensus V3

This release signifies a consensus version, and is not necessarily a good version to run a node on

WASM Module Root: 0xdd45c240cfe6624a7dfd0b0c965bf21301ebeea7a6a2a696781a6e03b04dc288

This contains the following consensus changes from devnet consensus v2:

• Fix gas price update looking too far back: #551
• Remove top clamp on L2 price adjustment: #553

Arbitrum v2.0.0 Nitro Alpha 2

• Cleanly handle L1 connections that don't support subscriptions: #536

Arbitrum v2.0.0 Nitro Alpha 1

This is the first release of the Arbitrum Nitro node 🎉

Arbitrum Nitro is the next generation L2 rollup software and the successor to Arbitrum Classic. Nitro is a feature-complete L2 protocol whose security is rooted in Web Assembly fraud proofs. This release improves performance and compatibility via native go-ethereum EVM execution, and introduces a new node software that currently supports the public Nitro Devnet.