Node Updates

MimbleWimbleCoin (MWC) v5.3.10

• Transaction fee limits: safeguards to prevent unexpectedly high fees.
• New “offline” mode: run in a mode better suited for cold wallet setups (prepare and sign transactions without network access).

We recommend upgrading if you use cold storage or routinely craft transactions for offline signing.

Ergo (ERG) 6.0.1

• Versioned block transaction serializer since 6.0: ensures the correct serializer version is used going forward.
• Candidate regeneration fixes: stability improvements while preparing block candidates.
• Indexed node API additions: endpoint to fetch blocks with full transactions.
• UTXO queries refined: option to exclude mempool-spent outputs across all “unspent” endpoints.
• Unconfirmed TX detail: endpoint now returns full inputs with proofs for pending transactions.

This maintenance release focuses on correctness, API completeness, and smoother block candidate handling.

Zcash (ZEC) v6.3.0

Network Upgrade 6.1 (NU6.1) preparations are included in this release.

• ZIP 271: Deferred Dev Fund Lockbox Disbursement.
• ZIP 1016 (partial): Community and Coinholder Funding Model.
• Activation (testnet): NU6.1 activates at height 3,536,500.
• Regtest control: can be activated at a specific height using -nuparams=4dec4df0:HEIGHT.
• Testing note: during the test phase, consensus rules may change; if so, testnet will be rolled back in v6.10.0 and re-activated a second time (see ZIP 255 for deployment process).

Bug fix: corrected accounting for unshielding transactions spending Orchard notes in transparent balance-related RPCs (e.g., getbalance, gettransaction), aligning behavior with earlier fixes for Sprout/Sapling.

Default updated: -preferredtxversion now defaults to 5 (NU5 format). Use -preferredtxversion=4 to retain the previous behavior.

Block Reward Reductions

Karlsen (KLS)

Per the Karlsencoin tokenomics and emission schedule, the block reward decreased:

• Previous: 29.71 KLS
• New: 28.89 KLS

Please pay attention! 2CryptoCalc has been updated accordingly.

Kaspa (KAS)

As part of the Kaspa emission schedule and Crescendo hard fork process, another planned reduction occurred:

• Previous: 4.90 KAS
• New: 4.62 KAS

Please pay attention! 2CryptoCalc reflects the new reward.

That wraps up the key events of August 2025. Follow us on X (Twitter) and join our Telegram community for instant updates and support.

Author

The 2Miners pool co-founder, businessman, miner. In 2017 started mining cryptocurrencies and built many rigs on his own. As a result, he gained lots of practical knowledge and became interested in sharing it with others.

In his articles on 2Miners, he shares useful tips that he tried and tested himself. For example, Darek gives advice on how to buy hardware components for the basic mining rig and how to connect them to each other correctly. He also explained lots of complicated terms in simple words, such as shares, mining luck, block types, and cryptocurrency wallets. After the pool was launched, he published a series of articles ‘Crypto Mythbusters’ where he explained how to protect the network against 51% attack, talked about cryptocurrency mining difficulty and difficulties of launching your own node.

Horizen (ZEN) Mining Ends – Pool Shutdown Completed

On July 22, 2025, mining of Horizen (ZEN) officially ended on 2Miners. This followed the project’s announcement of a major transition to the Base network (an Ethereum Layer 2 solution). As part of this strategic shift, the Horizen blockchain ceased operations at block 1,807,300, on July 23 at 6:00 UTC.

Our ZEN mining pool was shut down on July 22 at 12:00 UTC to allow for all final payouts to be processed before the hard fork.

Final payouts were sent to all miners successfully.

We are saddened by this abrupt change — the decision to migrate came as a surprise to us and the community. You can read more about Horizen’s upgrade on their official announcement page.

If you’re looking for an alternative Equihash coin to mine, we strongly recommend Zcash (ZEC). BTC payouts are available!

Flux v8.0.0 – Major Node Upgrade

The Flux development team has released Flux Daemon v8.0.0, a major upgrade that brings important structural changes ahead of the upcoming v9 fork planned for Q4 2025.

Key changes include:

• Block reward halving has been removed to stabilize node operations prior to the v9 upgrade.
• Support for 32-bit systems has been discontinued. Builds for i386 will no longer be provided.
• Improved chain analysis with getchaintips RPC now supporting block height filters for faster queries.
• GitHub Actions CI/CD integration replaces legacy CI systems for better automation, testing, and artifact management.
• Cross-compilation improvements for ARM64 and Windows binaries, including toolchain updates and fix for binary stripping.
• New Arcane Mode added with fArcane flag for advanced testing and benchmarking scenarios using UNMANAGED_FLUXBENCHD.

This release lays the groundwork for major architectural changes expected in Flux v9. All node operators are strongly encouraged to upgrade as soon as possible.

Block Reward Reduction

ERGO (ERG)

In accordance with the official Ergo Tokenomics and Emission Schedule, the block reward has been reduced.

• Previous reward: 15 ERG
• New reward: 12 ERG

KASPA (KAS)

Another planned reduction in the Kaspa emission schedule has occurred as part of the Kaspa Crescendo Hard Fork process.

• Previous reward: 5.19 KAS
• New reward: 4.90 KAS

Karlsen (KLS)

Karlsen block rewards have been reduced in line with the Karlsencoin Emission Schedule.

• Previous reward: 30.56 KLS
• New reward: 29.71 KLS

As always, check 2CryptoCalc to see up-to-date profitability and plan your strategy accordingly.

That wraps up the key events of July 2025. Follow us on X (Twitter) and join our Telegram community for instant updates and support.

Zephyr Protocol v2.3.0 – Major Update

We are pleased to report the release of Zephyr Protocol v2.3.0, bringing a range of technical improvements and performance enhancements to the network.

Highlights:

• New Zephyr CMake package simplifies setup and reduces reliance on environment variables.
• Modern Devicetree API using hierarchical macros enables clean and structured hardware access in code.
• Overhauled kernel timeout API prepares for future support of 64-bit and absolute timeouts.
• New k_heap/sys_heap allocator offers major performance gains over previous memory pools.
• Integration with the TF-M (Trusted Firmware-M) PSA-compliant framework enhances security architecture.
• Bluetooth LE Host now supports Advertising Extensions for improved wireless functionality.
• CMSIS-DSP library is now included and integrated for real-time signal processing tasks.

This release is a strong step forward in stability and performance for Zephyr developers and miners alike.

Zephyr Protocol Network Incident – June 15

On June 15, 2025, the Zephyr Protocol Network experienced a major disruption. The blockchain became desynchronized, resulting in a complete pause in mining operations.

Both the Zephyr Protocol development team and our pool engineers were immediately informed and began working on a resolution. The situation highlighted the importance of robust blockchain infrastructure, and we will continue to monitor for any follow-up issues. Thank you for your patience during the incident.

Ergo Protocol v6.0.0 – Soft-Fork Activation

The Ergo team has released Ergo Protocol Reference Client v6.0.0, introducing support for the long-awaited EIP-50 soft-fork.

Key Details:

More details on EIP-50 can be found in the official proposal: EIP-50 on GitHub.

Kaspa (KAS) Block Reward Reduction

As part of the Kaspa Tokenomics, Crescendo Hard Fork, and Emission Schedule, the block reward has been reduced once again.

• Previous Block Reward: 5.50 KAS
• New Block Reward: 5.19 KAS

Use 2CryptoCalc to adjust your mining expectations accordingly.

Karlsen (KLS) Block Reward Reduction

In accordance with the Karlsencoin Tokenomics and Emission Schedule, the Karlsen block reward has been reduced.

• Previous Block Reward: 31.43 KLS
• New Block Reward: 30.56 KLS

Make sure to check 2CryptoCalc to evaluate updated mining profitability.

That wraps up the key updates for June 2025. Stay tuned via X (Twitter) and Telegram for the latest mining news. Happy mining!

MimbleWimbleCoin (MWC) is Back on 2Miners!

We’re happy to announce that MimbleWimbleCoin (MWC) has returned to the 2Miners mining pool!

Important Notes:

• Payouts are available in MWC only (BTC payouts are not supported).
• You must use the official wallet for payouts: mwc.mw/downloads
• Profitability estimates are already available on 2CryptoCalc.
• The primary exchange for MWC is XT.com.

Node Updates

Zephyr Protocol v2.2.0 – Audit Extension

Hardfork v10 has activated at block 511000, re-enabling the Audit state (originally used in Hardfork v8). From this block forward, only audit transactions are permitted. All regular transfers and conversions are temporarily disabled.

This is your final opportunity to have your assets audited. The extension ensures that all services and ecosystem participants complete their audit procedures. The next hardfork, v11, will restore normal functionality and will require another update.

Stay informed through the official Zephyr channels for confirmation on v11 activation and the upcoming build.

Zephyr Protocol v2.2.1 – Wallet Improvements

This optional update delivers several wallet-side improvements and addresses reported transaction issues. Although not mandatory, it’s highly recommended for users experiencing problems with transaction rejection or UTXO synchronization.

Key Fixes and Enhancements:

• Improved transaction broadcasting in chunks.
• Updated UTXO selection logic to handle dust properly.
• Better synchronization behavior after broadcasting a transaction.
• New RPC options for viewing wallet versions and background operations.
• Memory leak fixes, syncing optimizations, and Node.js warning resolution.
• Improved transaction mass policy to prevent rejected submissions.

If your wallet has shown errors related to oversized transaction mass, this update should resolve those issues. Thanks to all community contributors!

Ergo Protocol Reference Client v5.0.25

The latest update to the Ergo reference client brings several useful changes for developers and node operators:

• New API Methods
• bannedPeers config field allows permabanning of specific peers.
• Improved rollback handling and extra index reliability.
• Reworked segment retrieval for better ordering in blockchain-related endpoints.

Attention Ergo (ERG) miners! In accordance with the Ergo Tokenomics and Emission Schedule, a scheduled block reward reduction has occurred. The block reward for miners has been decreased from 18 ERG to 15 ERG. Please make sure to update your profitability estimates — 2CryptoCalc has already been updated with the new value.

That’s all for May 2025. Don’t forget to follow us on X (Twitter) and join our Telegram community for real-time updates. Happy mining!

Zcash (ZEC) v6.2.0 Update

The Zcash team has officially started the deprecation process of zcashd in 2025. All full nodes are being transitioned to zebrad, and a new wallet, Zallet, is being developed as a replacement for the zcashd wallet interface.

While many JSON-RPC methods will be supported in zebrad or Zallet as drop-in replacements, others may require changes, and some will not be available at all. If you use zcashd for mining or other integrations, please review the JSON-RPC compatibility spreadsheet and provide your feedback to help improve migration support.

Platform Note: Support for Ubuntu 20.04 LTS has been dropped. It will reach its end of support in May 2025 and no longer meets Tier 2 policy requirements due to GitHub runner limitations.

Learn more: Zcashd Deprecation Information

KASPA (KAS) v1.0.0 — Crescendo Hardfork

The long-awaited Crescendo Hardfork is here! Kaspa has released rusty-kaspa v1.0.0, introducing major performance upgrades and an increase in block production speed from 1 block per second (BPS) to 10 BPS. The upgrade was activated on May 5, 2025, at approximately 15:00 UTC at DAA Score 110,165,000.

Key Features:

• 10 BPS Activation: 10x increase in block rate improves transaction throughput and responsiveness.
• New P2P Protocol v7: Required to maintain peer connectivity. Nodes will disconnect from peers using the older protocol 24 hours before activation.
• Retention Configuration: Use –retention-period-days to control how much historical data to keep. Default is approx. 30 hours (previously ~50 hours).
• Enhanced Node Efficiency: Better control over data storage and pruning due to higher block generation rate.

For full details, consult the Crescendo Upgrade Guide.

KASPA (KAS) Block Reward Reduction

As per the KASPA Tokenomics and emission schedule, a new block reward reduction has occurred:

• Previous Block Reward: 61.74 KAS
• New Block Reward: 58.27 KAS

Make sure to update your mining profitability estimates using 2CryptoCalc.

Nervos CKB v0.201.0 Update

The latest CKB release, v0.201.0, brings important maintenance and compatibility upgrades in preparation for future consensus changes. This update includes improvements in build stability, logging, and project maintainability.

Key Fixes and Improvements:

• Fixed WebAssembly (WASM) build errors in the previous version.
• Improved logging for assume-valid-target.
• Upgraded Rust toolchain to 1.85.0 and Rust edition to 2024.
• Introduced cargo autoinherit to centralize and simplify dependency management across the project.

Deprecation Notice: CentOS support will be discontinued soon. Users are advised to switch to other supported platforms or build from source.

For downloads and compatibility information, refer to the official CKB GitHub Release Page.

Stay tuned to our Twitter and Telegram for real-time updates. Happy mining!

BTC Payouts Disabled for Bitcoin Gold (BTG) Mining

We previously offered the ability to receive Bitcoin (BTC) payouts for mining Bitcoin Gold (BTG), facilitated via Gate.io. However, as Gate.io is closing BTG deposits, we have disabled BTC payouts for BTG mining.

Going forward, all payouts for BTG mining will be made exclusively in BTG.

Important: All pending BTC payouts were successfully processed.

Kaspa (KAS) Block Reward Reduction

As part of the ongoing KASPA Tokenomics and Emission Schedule, a new block reward reduction has taken place twice in March:

• Previous Block Reward: 69.29 KAS
• New Block Reward: 61.74 KAS

This change directly affects your mining rewards. Be sure to use 2CryptoCalc to re-evaluate your mining profitability.

Start or continue mining on:

Zephyr Protocol Audit Hardfork

Attention Zephyr (ZEPH) miners!

The Zephyr Protocol development team has announced the activation of the Audit Hardfork at block 481500. In preparation for this event, Zephyr Pool and Zephyr SOLO Pool were shut down prior to the hardfork. Now mining is operational again. We’ve completed the audit from our side.

Audit period runs from until May 7th. During this time, all transactions on the Zephyr Protocol network will be suspended until the audit process is completed.

For more details, please refer to the official Zephyr Telegram and Zephyr GitHub.

Relevant Pools:

Node Updates

Nexa v2.0.0.0

Nexa has released version 2.0.0.0, a mandatory upgrade for all full node users. The network upgrade is scheduled for March 31, 2025, at 12:00 UTC. Failure to upgrade in time will result in node disconnection from the Nexa network.

Highlights:

• New opcodes including OP_MERKLEROOT, OP_JUMP, OP_STORE, and OP_LOAD.
• Extended introspection with OP_INPUTTYPE, OP_OUTPUTTYPE, and OP_INPUTVALUE.
• Support for negative indexes with OP_ROLL and OP_PICK.
• Read-only inputs for advanced validation scenarios.
• Performance improvements for memory and CPU efficiency.
• Expanded platform support, including RISC-V and Alpine Linux.
• Improved documentation and RPC guidance.

This release unlocks powerful new scripting capabilities for developers while optimizing resource usage across full nodes.

Nervos CKB v0.200.0

Nervos has launched version 0.200.0, initiating the process to activate CKB Edition Meepo (2024) on the Mainnet. This is a breaking consensus change once activated, so node operators must prepare accordingly.

Key Changes:

• Activation of Edition Meepo 2024 via consensus-breaking update.
• New P2P service types with node filtering support.
• Connection time tracking for DNS-based peers.
• Improved RPC behavior (e.g., removal of duplicate addresses).
• Upgrade to OpenSSL 0.10.70 (addresses RUSTSEC-2025-0004 vulnerability).
• Enhanced syscall performance (spawn, exec).

All Nervos CKB node operators are advised to update to ensure continued network compatibility and security.

That wraps up the key updates for March 2025. Stay connected through our X (Twitter) and Telegram for the latest mining news and updates. Happy mining!

Node Updates

Horizen (ZEN) 5.0.5

The Zend v5.0.5 update is now live. All nodes on the Mainnet must have been updated before December 12, 2024, as Zend v5.0.4 was deprecated at block #1679880. Zend v5.0.5 will remain active until its deprecation at block #1730680, expected on March 11, 2025. This update included bug fixes and minor changes, ensuring the network remains secure and reliable.

Cortex (CTXC) 1.10.61

Cortex released version 1.10.61, featuring multiple stability improvements and performance enhancements:

• Enhanced database snapshots for better state management.
• Bug fixes addressing flaky tests and state destruction issues.
• Optimized chain events and header management for efficient synchronization.
• New features like the DeleteRange functionality and support for prestateTracer configuration options.

Ergo (ERG) 5.0.24

The Ergo update 5.0.24 includes critical fixes and optimizations:

• Refactoring of Autolykos-related code for better efficiency.
• Resolved issues with API crashes and transaction mempool management.
• Enhanced support for upcoming Ergoscript changes post-6.0 activation.

Bitcoin Cash (BCH) v28.0.0

Bitcoin Cash Node v28.0.0 has been released in preparation for the May 15, 2025, network upgrade. Key highlights:

• Introduction of CHIP-2021-05 for virtual machine limits and CHIP-2024-07 for high-precision arithmetic.
• Improved p2p protocol with enhanced timestamp handling and port mapping support.
• Expanded Script VM capabilities, including support for 80,000-bit integers.

Note: 32-bit architecture support has been dropped due to increasing resource demands.

Pyrin (PYI) Delisting

We regret to announce the delisting of Pyrin (PYI) from the 2Miners pool. As of December 20, 2024, at 07:00 UTC, PYI PPLNS and PYI SOLO operations have ceased. This decision was made after the developers abandoned the project, deleting all resources and leaving the community without support. We encourage PYI miners to use 2CryptoCalc to find alternative profitable coins to mine.

Nervos (CKB) Pool API Update

Nervos CKB miners can now enjoy enhanced pool features! We updated the API and statistics pages, enabling detailed hashrate and share statistics. You can also adjust the payout threshold directly in the CKB pool. If the changes don’t appear, clear your browser cache with Shift+Ctrl+R (or Shift+Command+R on macOS).

Bitcoin and Toncoin Payouts for Multiple Coins

Great news for Bitcoin Gold (BTG) miners! Bitcoin and Toncoin payouts are now available. Simply set your BTC or TON wallet address in your mining software, and the pool will handle the rest. Note that payouts may take up to 3 days due to BTG deposit rules on crypto exchanges.

Toncoin payouts have also been added for the following pools:

Block Reward Reductions

December saw major block reward reductions for these coins:

• Horizen (ZEN): Block reward halved from 3.75 ZEN to 1.875 ZEN.
• Kaspa (KAS): Block reward reduced from 77.78 KAS to 73.41 KAS.

These reductions are part of their respective tokenomics and emission schedules. Use 2CryptoCalc to estimate your mining rewards effectively.

2024 Wrap-Up and Best Wishes for 2025

As 2024 ends, we celebrate a historic milestone: Bitcoin reached $100,000 on December 5, 2024, marking a new era for cryptocurrency. The crypto market is growing, and mining remains profitable. A regular GPU is still enough to earn Bitcoins, and 2025 promises even more opportunities.

We plan to introduce new coins to the 2Miners pool, supporting emerging projects and fostering innovation in the mining community. Stay tuned for more updates!

Happy New Year! Let’s make 2025 another remarkable year for cryptocurrency and mining. Ho! Ho! Ho! Happy Mining!

Bitcoin (BTC) Payouts Disabled for Bitcoin Gold (BTG) Mining

Previously, miners had the option to receive Bitcoin (BTC) payouts while mining Bitcoin Gold (BTG) through the Gate.io exchange. However, due to Gate.io discontinuing BTG deposits in the coming days, we will no longer support BTC payouts for BTG mining.

Effective immediately, all BTG mining payouts will be made exclusively in BTG.

What This Means for Miners:

• New BTG mining payouts will be processed in BTG only.
• Pending BTC payouts from recent days will still be processed, provided the exchange completes the necessary deposit transactions.

We understand that changes like this can be inconvenient, and we appreciate your understanding as we adapt to evolving exchange policies.

Node Updates

Zcash (ZEC) v6.1.0

The latest Zcash update, version 6.1.0, is a maintenance release designed to ensure the smooth operation of the network. This update sets a new end-of-service height, ensuring continued network functionality without disruptions. All Zcash miners are encouraged to update to this version to maintain uninterrupted mining.

Zephyr Protocol v2.0.2 – ZSD Yield (Hotfix)

The Zephyr Protocol has introduced version 2.0.2 as an emergency hotfix release, specifically targeting mining pools. This is a required update, and mining pools must upgrade to this version immediately.

Exchanges have been advised to keep deposits and withdrawals suspended for the time being. Regular desktop users do not need to update, as a larger chain audit update is expected soon.

Hardfork v7 Activation:

• Activated at block 433000.
• Includes a crucial security update to address an issue discovered prior to the full audit update.
• Details of the hotfix will be disclosed after the transition to v7 is complete.

We strongly recommend all mining pools running Zephyr to update immediately to ensure network stability.

Block Reward Reductions

January 2025 saw scheduled block reward reductions for multiple cryptocurrencies in accordance with their emission schedules. The updated rewards are as follows:

Kaspa (KAS)

• Previous Block Reward: 73.41 KAS
• New Block Reward: 69.29 KAS

Ergo (ERG)

• Previous Block Reward: 21 ERG
• New Block Reward: 18 ERG

Karlsen (KLS)

• Previous Block Reward: 35.15 KLS
• New Block Reward: 34.19 KLS

These reductions are part of the ongoing emission schedules for each network. To calculate potential mining rewards after these changes, visit 2CryptoCalc.

As always, stay updated through our X (Twitter) and Telegram miner community. Happy mining!