Release 3.3.0.0.0: Stacks 3.3 Hard Fork
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Jesse Wiley
Nov 3, 2025, 5:20:51 PM (8 days ago) Nov 3
to announce
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Hash: SHA512
Hello,
Stacks core developers have released Stacks Core version 3.3.0.0.0, available here: https://github.com/stacks-network/stacks-core/releases/tag/3.3.0.0.0.
This release implements the 3.3 Stacks consensus rules which activates at Bitcoin block `923,222`. For more details see SIP-033.
**This is a required upgrade**
- Activation is estimated for November 11th, 2025 around 1600 UTC, or Bitcoin block 923,222.
- Upgrading after Bitcoin block 923,222 **will require** a genesis sync.
This release is compatible with chainstate directories from 3.x.x.x.x.
The version of stacks-signer compatible with this release is 3.3.0.0.0.0, available at: https://github.com/stacks-network/stacks-core/releases/tag/signer-3.3.0.0.0.0.
### Added
- Added support for new Clarity 4 builtin, `secp256r1-verify?` (not activated until epoch 3.3)
- New `block_proposal_validation_timeout_secs` configuration option in the connection options section, allowing to set the maximum duration a node will spend validating a proposed block.
- Activation height selected and set for epoch 3.3 at Bitcoin block 923,222
### Changed
- Renamed Clarity 4's new `block-time` to `stacks-block-time`
- Improve cost-tracking for type-checking function arguments in epoch 3.3 (see [#6425](https://github.com/stacks-network/stacks-core/issues/6425))
- Replaced `libsecp256k1` with `k256` and `p256` from RustCrypto and removed separate Wasm implementations.
- Added limits in the type-checker for the number of parameters in functions (maximum 256), and the number of methods in traits (maximum 256). These limits are enforced starting in Epoch 3.3.
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Stacks Core:
Git commit hash: 0a67d21bddbc9d2cfc30251e7f43213224bb5794
SHA512SUMS:
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------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Stacks Signer:
Git commit hash: 0a67d21bddbc9d2cfc30251e7f43213224bb5794
SHA512SUMS:
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Best,
Jesse Wiley
Engineering Partner, Stacks Foundation
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Hash: SHA512
Hello,
Stacks core developers have released Stacks Core version 3.3.0.0.0, available here: https://github.com/stacks-network/stacks-core/releases/tag/3.3.0.0.0.
This release implements the 3.3 Stacks consensus rules which activates at Bitcoin block `923,222`. For more details see SIP-033.
**This is a required upgrade**
- Activation is estimated for November 11th, 2025 around 1600 UTC, or Bitcoin block 923,222.
- Upgrading after Bitcoin block 923,222 **will require** a genesis sync.
This release is compatible with chainstate directories from 3.x.x.x.x.
The version of stacks-signer compatible with this release is 3.3.0.0.0.0, available at: https://github.com/stacks-network/stacks-core/releases/tag/signer-3.3.0.0.0.0.
### Added
- Added support for new Clarity 4 builtin, `secp256r1-verify?` (not activated until epoch 3.3)
- New `block_proposal_validation_timeout_secs` configuration option in the connection options section, allowing to set the maximum duration a node will spend validating a proposed block.
- Activation height selected and set for epoch 3.3 at Bitcoin block 923,222
### Changed
- Renamed Clarity 4's new `block-time` to `stacks-block-time`
- Improve cost-tracking for type-checking function arguments in epoch 3.3 (see [#6425](https://github.com/stacks-network/stacks-core/issues/6425))
- Replaced `libsecp256k1` with `k256` and `p256` from RustCrypto and removed separate Wasm implementations.
- Added limits in the type-checker for the number of parameters in functions (maximum 256), and the number of methods in traits (maximum 256). These limits are enforced starting in Epoch 3.3.
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Stacks Core:
Git commit hash: 0a67d21bddbc9d2cfc30251e7f43213224bb5794
SHA512SUMS:
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------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Stacks Signer:
Git commit hash: 0a67d21bddbc9d2cfc30251e7f43213224bb5794
SHA512SUMS:
d3a732439863740befb628edbe29ec14f68a6aff155a72d8cb8f36d9d36074229b16fa4d41fb026626c0ab207fe6a74b28c9ae3c48058cf33b6cbb375f0da53f linux-glibc-arm64.zip
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Best,
Jesse Wiley
Engineering Partner, Stacks Foundation
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