v1.12.0

This release updates the Flare (and Songbird) codebase to Avalanche 1.12.0. See Avalanche release notes and Flare release notes for more details.

All nodes should upgrade to this version before the following dates:

• November 13, 2025 at 10 AM UTC for the Coston network,
• November 13, 2025 at 2 PM UTC for the Coston2 network,
• November 25, 2025 at 12 PM UTC for the Songbird network,
• December 2, 2025 at 12 PM UTC for the Flare network.

Important: Ensure you back up staker.crt, staker.key, and signer.key files before the node upgrade. (See also v1.10.0 Note for details.)

v1.11.13

This release updates the Flare (and Songbird) codebase to Avalanche 1.11.13. See Avalanche release notes and Flare release notes for more details.

This version is backwards compatible to v1.11.0. It is optional, but encouraged.

Important: Ensure you back up staker.crt, staker.key, and signer.key files before the node upgrade. (See also Note in the Flare Releases for details.)

v1.11.0

This release updates the Flare (and Songbird) codebase to Avalanche 1.11.0. See Avalanche release notes and Flare release notes for more details.

All nodes should upgrade to this version before the following dates:

Songbird network: July 22, 2025 at 12:00:00 UTC
Flare network: August 5, 2025 at 12:00:00 UTC

v1.11.0-testnet

Please note that this release is unable to run Flare or Songbird mainnets - and will display "mainnet is not supported" if attempted to run with flare or songbird network id configuration.

Testnets should be updated to this version before

• Coston 2 (Flare testnet): June 24, 2025 at 12 UTC
• Coston (Songbird testnet): July 1, 2025 at 12 UTC

This release updates the Flare (and Songbird) codebase to Avalanche 1.11.0. See more details in the Avalanche 1.11.0 release notes.

v1.10.0

This release updates the Flare (and Songbird) codebase to Avalanche 1.10.0. See Avalanche release notes and Flare release notes for more details.

All nodes should upgrade to this version before the following dates:

Songbird network: May 6, 2025 at 12:00:00 UTC
Flare network: May 13, 2025 at 12:00:00 UTC

v1.10.0-testnet

Please note that this release is unable to run Flare or Songbird mainnets - and will display "mainnet is not supported" if attempted to run with flare or songbird network id configuration.

Testnets should be updated to this version before

• Coston (Songbird testnet): March 27, 2025 at 13 UTC
• Coston 2 (Flare testnet): April 8, 2025 at 12 UTC

This release updates the Flare (and Songbird) codebase to Avalanche 1.10.0. See more details in the Avalanche 1.10.0 release notes.

v1.9.1

This release updates the Flare (and Songbird) codebase to Avalanche 1.9.0. See more details in the Avalanche 1.9.0 release notes. Note, however, that AddPermissionlessValidatorTx, AddPermissionlessDelegatorTx and AddSubnetValidatorTx transactions are disabled (to disallow the use of subnets).

Additionally, this release adds the ability to sign P-chain transactions with the standard Ethereum prefix ("\x19Ethereum Signed Message:\n ") to allow for compatibility with signing tools that automatically add this prefix (e.g. MetaMask).

All nodes should upgrade to this version before the following dates:

Flare network: December 17, 2024 at 12:00:00 UTC
Coston network: January 7, 2025 at 12:00:00 UTC
Songbird network: January 28, 2025 at 12:00:00 UTC

All nodes should report version avalanche/1.9.1. Note also that the peers info API on the Songbird nodes reports version flare/0.7.1 after the upgrade.

Upgrade to version 1.9.0

This release updates the Flare (and Songbird) codebase to Avalanche 1.9.0. See more details in the Avalanche 1.9.0 release notes. Note, however, that AddPermissionlessValidatorTx, AddPermissionlessDelegatorTx and AddSubnetValidatorTx transactions are disabled (to disallow the use of subnets).

Additionally, this release adds the ability to sign P-chain transactions with the standard Ethereum prefix ("\x19Ethereum Signed Message:\n <message length>") to allow for compatibility with signing tools that automatically add this prefix (e.g. MetaMask).

This release deprecated, all Flare and Songbird nodes should upgrade to v1.9.1.

Songbird network support

This release supports Songbird network and Coston testnet. It upgrades the coreth version to v0.8.16 and avalanchego version to v1.7.18 with Songbird (Flare) specific features.

All Songbird nodes should be upgraded to this version before October 29, 2024, 12:00:00 UTC.

Flare - Songbird code integration - Coston 1

Coston 1 fork for the process of the Songbird decentralization and code integration with the Flare network. Coston 1 nodes should upgrade before July 23, 2024 at 12:00:00 UTC. Staking can be performed from July 30, 2024 at 12:00:00 UTC.