v2.1.0

Bifrost Node v2.1.0

Release Date: September 11, 2025
Rust Compiler: rustc 1.89.0 (29483883e 2025-08-04) or later

Summary

Bifrost Node v2.1.0 introduces significant enhancements to both Ethereum and Bitcoin interoperability infrastructure. Major updates include Pectra Ethereum Hard Fork support with EIP-7702 account abstraction features, the addition of the BLAZE (BRP Layer for Autonomous Zero-trust Execution) pallet for advanced Bitcoin UTXO management, comprehensive upgrades to Substrate and Frontier dependencies, and substantial improvements to the BTC relay system. This release focuses on optimizing both Ethereum account abstraction capabilities and Bitcoin UTXO management while strengthening the cross-chain infrastructure.

⚠️ Important

Due to updates that occurred on the client-side when upgrading to bifrost-polkadot-stable2506, client upgrades are mandatory for both testnet and mainnet node operators. All node clients running previous versions must upgrade to v2.1.0 for continued compatibility, enhanced Ethereum account abstraction support, Bitcoin relay functionality, and improved stability.

Notable Updates

🚀 New Features

BLAZE Pallet Integration

• New Bitcoin UTXO Management System: Introduced the BLAZE pallet for advanced Bitcoin UTXO handling and management
• UTXO Status Tracking: Comprehensive tracking of UTXO states (Unconfirmed, Available, Locked, Used)
• Enhanced Bitcoin Integration: Improved Bitcoin relay capabilities with dedicated UTXO operations
• Precompile Support: Added BLAZE precompile for seamless EVM integration

Pectra Ethereum Hard Fork Support (EIP-7702)

• Account Abstraction Enhancement: Implemented EIP-7702 Set EOA account code for one transaction support
• Authorization Lists: Added comprehensive AuthorizationList support throughout runtime APIs for enhanced transaction authorization
• Enhanced EVM Integration: Updated EVM call, create, and trace APIs with authorization list parameters
• Testnet Optimization: Applied Pectra-specific configurations for enhanced testnet performance with account abstraction features
• Weight Updates: Comprehensive weight recalculation for improved transaction efficiency with new EIP support

Trace Namespace RPC Enhancements

• Transaction Tracing: Added trace_transaction RPC method for detailed execution tracing of individual Ethereum transactions
• Block Tracing: Implemented trace_block RPC method for comprehensive tracing of all transactions within a block

🔧 System Upgrades

Substrate & Frontier Framework Updates

• Version Bump: Upgraded to bifrost-polkadot-stable2506 across all Substrate and Frontier components
• Dependency Consolidation: Updated 70+ substrate dependencies for consistency and performance
• Security Enhancements: Latest security patches and optimizations from Polkadot SDK

Enhanced Pallets

BTC Registration Pool:

• Added comprehensive benchmarking support
• Enhanced registration logic with improved error handling
• Optimized weight calculations for better performance

BTC Socket Queue:

• Implemented full benchmarking framework
• Improved queue management algorithms
• Enhanced socket connection stability

Relay Manager:

• Added benchmarking capabilities
• Improved relay coordination mechanisms
• Enhanced cross-chain communication reliability

References

• BLAZE Pallet Implementation: #125
• Pectra & Weight Updates: #128

Version Upgrades

Component	Previous	Current
Substrate Framework	bifrost-polkadot-stable2407	bifrost-polkadot-stable2506
Frontier Framework	bifrost-polkadot-stable2407	bifrost-polkadot-stable2506
Client Version	v2.0.1	v2.1.0

---

Full Changelog: v2.0.1...v2.1.0

v2.0.1

Bifrost Node v2.0.1

This release contains the changes from v2.0.0 to v2.0.1.

Rust compiler versions

This release was built and tested with the following versions of rustc.
Other versions may also be compatible.

• Rust Stable: rustc 1.81.0 (eeb90cda1 2024-09-04)
• Rust Nightly: rustc 1.83.0-nightly (9ff5fc4ff 2024-10-03)

Summary

This report outlines the recent updates to the Bifrost Network's Node client and runtime. The main feature of the new release is the upgrade to polkadot-sdk@stable2407 within Substrate and Frontier frameworks. Furthermore, this version introduces notable improvements in performance and efficiency across runtime pallets and client modules.

Notable Updates

• [Frontier] Ethereum Cancun Upgrade
  • Two new opcodes (TLOAD and TSTORE) has been added that was introduced by EIP-1153.
  • One new opcode (MCOPY) has been added that was introduced by EIP-5656.
  • Changes the behaviour of the SELFDESTRUCT opcode that was introduced by EIP-6780.
• [Frontier] Fix the gas discrepancy of eth_estimateGas and the actual execution (link.)
• [Frontier] Add standard debug namespace RPC methods (link.)
• [Substrate] Implement new pallets to the runtime: safe-mode and tx-pause (link.)
• [Substrate] Migrate NativeElseWasmExecutor to WasmExecutor (link.)
• [Substrate] Optimize logic for gossiping assignments. This gives us a 15% to 20% reduction in cpu usage (link.)
• [Substrate] Optimize finalization performance. This gives us faster and fewer memory allocations (link.)

References

• Gitbook
• Forum

Version Upgrades

Component	version
node implementation	v2.0.0 → v2.0.1
substrate/frontier implementation	bifrost-polkadot-stable2407

Assets

Assets	sha256checksum
bifrost-node	6ad566debe0d9942bf5297cb7c22f7ce670e39d9db0f05294a2c8a4765c205bd
bifrost-node-aarch64-macos	75ee6570b3e9b89228fff846b6fd4b66fd79078eada57515bb501bf111b1053b
bifrost-testnet.json	9de17056c310b91c9d615fa8e7a161149f0138309d55321058da7cb75294d58f
bifrost-mainnet.json	808e4adfcb8f139ee8cc1b3ca94842945b99402a0e8d283fd0b36e7c421be69f

v2.0.0

Bifrost Node v2.0.0

This release contains the changes from v1.3.0 to v2.0.0.

Rust compiler versions

This release was built and tested with the following versions of rustc.
Other versions may also be compatible.

• Rust Stable: rustc 1.81.0 (eeb90cda1 2024-09-04)
• Rust Nightly: rustc 1.83.0-nightly (9ff5fc4ff 2024-10-03)

Summary

Bifrost Node 2.0 integrates Bitcoin Relay Protocol (BRP) and introduces support the Bitcoin network.
This report presents the latest modifications to the Bifrost Network’s Node client and runtime.
⚠️ Node clients that are running under v2.0.0 are recommended (but not mandatory) to be version upgraded.

Changes

• [Release v2.0.0] Bitcoin Relay Protocol Implementations (#93)

References

• Gitbook

Version Upgrades

Component	version
node implementation	v1.3.0 → v2.0.0
substrate/frontier implementation	bifrost-polkadot-v1.3.0

Assets

Assets	sha256checksum
bifrost-node	d94603ae82e2007e5b4fa9975d5780331d805a27758a19c3edd95f042ef4e2d8
bifrost-node-aarch64-macos	df7a8454b44459e9f3a02fbc105a783d5414dd16c0d574074769317e9d7c9167
bifrost-testnet.json	739453341ae40cc4a045ad2461cc62602b62d919f49fc7b093351fa1616540fb
bifrost-mainnet.json	3ebc55a23bc66f9ed9bab54f48da99ce2fdb35d891a4dda27aced16356593e98

v1.3.0

Bifrost Node v1.3.0

This release contains the changes from v1.2.5 to v1.3.0.

Rust compiler versions

This release was built and tested against the following versions of rustc.
Other versions may work.

• Rust Stable: rustc 1.75.0 (82e1608df 2023-12-21)
• Rust Nightly: rustc 1.77.0-nightly (6ae4cfbbb 2024-01-17)

Summary

This report presents the latest modifications to the Bifrost Network’s Node client and runtime. The key highlights of the new version is the migration in Substrate and Frontier to [email protected]. Additionally, this update also brings significant performance and efficiency enhancements on native runtime pallets, for example our staking pallet. For more information, refer to the detailed descriptions below.

Changes

• Bifrost pallet improvements (#34)
• Polkadot SDK migration: v1.3.0 (#36)
• Patch Rust EVM (#35)
• JSON RPC response format update: web3_clientVersion (#37)
• Add a delay on relayer address update (#38)

References

• Forum
• Gitbook

Version Upgrades

Component	version
node implementation	v1.2.5 → v1.3.0
substrate/frontier implementation	bifrost-polkadot-v1.3.0
testnet runtime implementation	v463 upgraded at block 13,848,812
mainnet runtime implementation	v2020 upgraded at block 11,450,760

Assets

Assets	sha256checksum
bifrost-node	16b6b31e2faa29e53384649096c82dfe68bb81726c38ae338b67380b4a34ccca
bifrost-node-aarch64-macos	792a016eab8e29165540557aa080a46093e604e2dbebfc953b1795b85d76f048
bifrost-testnet.json	739453341ae40cc4a045ad2461cc62602b62d919f49fc7b093351fa1616540fb
bifrost-mainnet.json	3ebc55a23bc66f9ed9bab54f48da99ce2fdb35d891a4dda27aced16356593e98

v1.2.5

Bifrost Node v1.2.5

This release contains the changes from v1.2.4 to v1.2.5.

Rust compiler versions

This release was built and tested against the following versions of rustc.
Other versions may work.

• Rust Stable: rustc 1.74.1 (a28077b28 2023-12-04)
• Rust Nightly: rustc 1.76.0-nightly (3f28fe133 2023-12-18)

Summary

This report presents the latest modifications to the Bifrost Network’s Node client and runtime. The key highlights of the new version includes resolving state inconsistencies between the runtime and frontier EVM engine, alongside fixing minor bugs. For more information, refer to the detailed descriptions below.

Runtime Changes

• [Frontier] Runtime-API: Fix inconsistent gas weight mapping for WeightV2 (commit #9cb67a8)
• [Frontier] Fix inconsistent evm crate versions (bifrost-platform/bifrost-frontier#2)
• [Frontier] Fix inconsistent transferable balance (#27)
• [Native] Remove pallet::without_storage_info macros (commit #4278789)
• [Native] Sort on controller and relayer address modifications (#32)

Client Changes

• [Native] Build on stable Rust version (#28)
• [Substrate] Increase maximum instance count (paritytech/polkadot-sdk#1856)

References

• Forum
• Gitbook

Version Upgrades

Component	version
node implementation	v1.2.4 → v1.2.5
substrate/frontier implementation	bifrost-polkadot-v0.9.43
testnet runtime implementation	v461 upgraded at block 12,293,859
mainnet runtime implementation	v2018 upgraded at block 9,636,216

Assets

Assets	sha256checksum
bifrost-node	7d6e7ef48a347876ebdc01a920321753632a27f3d5c3813b3421c4eb38bf7e83
bifrost-node-aarch64-macos	e5a231a87af3911712326a17062a0bb4cc221f9c23499e389041d6ac56c8cfe3
bifrost-testnet.json	969b6faada789911b135e9548240efc0ecdb6a8f326c9ac74670fd7cd6e49299
bifrost-mainnet.json	71d9fce8141553871b240d49e3dcbefe731111ac5bd925d7ad30b5ca1011e725

v1.2.4

Bifrost Node v1.2.4

This release contains the changes from v1.2.3 to v1.2.4.

Rust compiler versions

This release was built and tested against the following versions of rustc.
Other versions may work.

• Rust Stable: rustc 1.71.0 (8ede3aae2 2023-07-12)
• Rust Nightly: rustc 1.71.0-nightly (521f4dae1 2023-05-19)

Summary

This report presents the latest modifications to the Bifrost Network's Node. The key highlight of this new version is the transition in Substrate and Frontier from bifrost-polkadot-v0.9.39 to bifrost-polkadot-v0.9.43. As a result of this update, we've now achieved the version immediately preceding the significant new release, polkadot-v1.0.0. Additionally, this update enhances the robustness and reliability of in-built EVM (Ethereum Virtual Machine) while setting important benchmarks for upcoming functionalities.

⚠️ Please note that upgrading your Bifrost Node client is mandatory for Full Nodes after a runtime upgrade occurs. If you’re operating a full node or a relayer on our Mainnet or Testnet please check the runtime upgrade schedule below. If the client has not been upgraded, precompiled contract interactions requested to your node will always fail.

• [Mandatory] Full Nodes
• [Recommend] Basic Nodes, RPC Nodes

Substrate Changes

• Introduce Freezing and Holds to pallet_balances. Deprecate Currency. (paritytech/substrate#12951)
• Integrate WebSocket and RPC server CLI options. (paritytech/substrate#13384)
• Allow zero existential deposit (ED). (paritytech/substrate#13655)
• Remove and deprecate trait Store from all pallets. (paritytech/substrate#13535)
• Deprecate Weight::from_ref_time and Weight::from_proof_size. (paritytech/substrate#13475)
• Support stable Rust version for compiling. (paritytech/substrate#13580)

Frontier Changes

• Introduce Weight V2 for EVM. (polkadot-evm/frontier#1039)
• Fix gas estimation bug for Weight V2. (polkadot-evm/frontier#1101)
• Update EVM version to shanghai. (polkadot-evm/frontier#1068)
• Support relational backend type for Frontier database (polkadot-evm/frontier#883)

References

• Forum
• Gitbook

Version Upgrades

Component	version
node implementation	v1.2.3 → v1.2.4
substrate/frontier implementation	bifrost-polkadot-v0.9.39 → bifrost-polkadot-v0.9.43
testnet runtime implementation	v454 → v455 upgraded at block 9472900
mainnet runtime implementation	v2015 → v2016 upgraded at block 7850900

Assets

Assets	sha256checksum
bifrost-node	fafa2bbb926eaacd0e67429263bb5d9f6e1ce13695dcc6482a3efd30584000ef
bifrost-node-aarch64-macos	a43729d97ecaacc6b0233380f17896dd36fa0ed8663f21aa4fe80cbc1a713f44
bifrost-testnet.json	969b6faada789911b135e9548240efc0ecdb6a8f326c9ac74670fd7cd6e49299
bifrost-mainnet.json	71d9fce8141553871b240d49e3dcbefe731111ac5bd925d7ad30b5ca1011e725

v1.2.3

BIFROST v1.2.3

This release contains the following minor changes to the runtime and client implementations. In addition, this will also resolve some vulnerabilities related to wasmtime.
⚠️ Client version upgrades are recommended but not mandatory.

Related Pull Request

• #16

Native Changes

• Bump substrate and frontier dependencies to branch bifrost-polkadot-v0.9.39
• Bump rust toolchain version.
• Bump dependencies for tests and tools.
• Move every general workspace dependencies to the root Cargo.toml.
• Add an independent CLI option that sets the RPC request timeout that's related to EVM transaction logs.
• Use IdentityAddressMapping for pallet_evm.AddressMapping instead of native IntoAddressMapping.
• Simplify FindAuthorAccountId's find_author() method.
• Remove deprecated pallet-random-collective-flip from runtime.

Substrate Changes that impacts runtime codebase

• paritytech/substrate#13110
• paritytech/substrate#13159
• paritytech/substrate#13410
• paritytech/substrate#13216
• paritytech/substrate#13237
• paritytech/substrate#13301

Frontier Changes that impacts runtime codebase

• polkadot-evm/frontier#1011
• polkadot-evm/frontier#1014

Versions

Component	version
node implementation	v1.2.3
substrate/frontier implementation	bifrost-polkadot-v0.9.39
testnet runtime implementation	453 at block 6628564
mainnet runtime implementation	2013 at block 4203509

Assets

Assets	sha256checksum
bifrost-node	6803102ec1e0641fd0a793457886bceffc5a5132f4b24d6f6d293fc965f1f58d
bifrost-node-aarch64-macos	767d578aab498e0f397950270baa3913d3c99b8243849d76e60a156a78adf18d
bifrost-testnet.json	969b6faada789911b135e9548240efc0ecdb6a8f326c9ac74670fd7cd6e49299
bifrost-mainnet.json	71d9fce8141553871b240d49e3dcbefe731111ac5bd925d7ad30b5ca1011e725

v1.2.2

BIFROST v1.2.2

This release contains the following minor changes to the runtime implementations.
⚠️ Client version upgrades are recommended but not mandatory.

• Bump substrate and frontier version to bifrost-polkadot-v0.9.37.
  • bifrost-substrate - https://github.com/bifrost-platform/bifrost-substrate/tree/bifrost-polkadot-v0.9.37
  • bifrost-frontier - https://github.com/bifrost-platform/bifrost-frontier/tree/bifrost-polkadot-v0.9.37
• Setup cargo workspace dependencies to enable centralized version control for substrate and frontier dependencies.

These changes will fix the following frontier vulnerability

• https://www.opencve.io/cve/CVE-2023-28431
• polkadot-evm/frontier#1017

Versions

Component	version
node implementation	v1.2.2
substrate/frontier implementation	bifrost-polkadot-v0.9.37
testnet runtime implementation	452 at block 4840762
mainnet runtime implementation	2012 at block 2216640

Assets

Assets	sha256checksum
bifrost-node	b8d5f875b140795b18118ae9bc0fb5359ef3513626d7a9726d020a0ed4abf986
bifrost-node-aarch64-macos	41ba5e9824db4d02474f8dbfd7da330eec6ed7e7b0fdc33817a0146ce1fe1bcb
bifrost-testnet.json	969b6faada789911b135e9548240efc0ecdb6a8f326c9ac74670fd7cd6e49299
bifrost-mainnet.json	71d9fce8141553871b240d49e3dcbefe731111ac5bd925d7ad30b5ca1011e725

BIFROST v1.2.1

BIFROST v1.2.1

This release contains a minor bug fix of the Frontier implementation. The previous implementation has forced to ignore the Frontier database migration to V2 happen. This has issued some misbehavior when requesting Ethereum RPC requests on historical data.

Related Frontier update.

On this release, the migration will be executed on restart. Please follow the instructions below for clients facing the problem. (Not mandatory but recommended)

1. Stop the running bifrost-node client.
2. Backup & remove {base-path}/chains/{mainnet|testnet|dev}/frontier/db/db_version file.
3. Replace the previous bifrost-node to v1.2.1.
4. Restart the bifrost-node client with the replaced version.

Versions

Component	version
node implementation	v1.2.1
substrate/frontier implementation	bifrost-polkadot-v0.9.35

Assets

Assets	sha256checksum
bifrost-node	ad7942ba7307cf4326e726ec5152da79eb9e6eafcf040e4904db59da31a1a8f5
bifrost-node-aarch64-macos	9934d2c7bf48cbe2656d50ecf861d2c2ffdccf7f86b47a4c7a26f35f1c1a5faf
bifrost-testnet.json	969b6faada789911b135e9548240efc0ecdb6a8f326c9ac74670fd7cd6e49299
bifrost-mainnet.json	71d9fce8141553871b240d49e3dcbefe731111ac5bd925d7ad30b5ca1011e725

BIFROST v1.2.0

BIFROST v1.2.0

This release contains minor updates based by version pre-v1.2.0

⚠️ We highly recommend node operators who are below version pre-v1.2.0 to update their running node's to this released version.

Changes

• Increase the minimum self-bond requirement for full nodes (mainnet only)
• Refresh the relayer status to Idle at every round update
• Add missing view functions for BfcStaking.sol precompiled contract
• Replace pallet storage values that consists Vec types to BoundedVec (length sensitive only)
• Introduce extrinsic heartbeat_v2() to pallet_relay_manager for relayer version tracking
• Use explicit call indices for custom pallets

Versions

Component	version
node implementation	v1.2.0
substrate/frontier implementation	bifrost-polkadot-v0.9.35
testnet runtime implementation	450 at block 3953062
mainnet runtime implementation	2010 at block 1297742

Assets

Assets	sha256checksum
bifrost-node	bb329a64231cab9d0e77b46bb0dded69797ec45f86465b706bf1829c52852e9f
bifrost-node-aarch64-macos	8a4e4261e9585961d801a0392e465648b8f01474223156d2161756f9b3a3782f
bifrost-testnet.json	969b6faada789911b135e9548240efc0ecdb6a8f326c9ac74670fd7cd6e49299
bifrost-mainnet.json	71d9fce8141553871b240d49e3dcbefe731111ac5bd925d7ad30b5ca1011e725