GRIN Wallet Guide: Helping Miners Get Started

In December, we published a detailed step-by-step guide explaining how to use the GRIN wallet correctly. GRIN remains one of the coins that can be very profitable to mine, but it also causes constant confusion among miners — especially those encountering it for the first time.

The main issue is that GRIN cannot be mined directly to an address generated on a cryptocurrency exchange. Instead, miners must use a local GRIN wallet and properly configure transaction methods such as HTTP or file-based transactions. This additional complexity often leads to setup errors, failed payouts, or miners abandoning GRIN altogether.

That is exactly why we created this guide — to walk miners through the entire process step by step and remove unnecessary friction:

How to Use the GRIN Wallet: A Step-by-Step Guide for Cryptocurrency Miners

If you are mining or planning to mine GRIN, we strongly recommend reading this article carefully.

Clore Mining Has Ended

We regret to share extremely unpleasant — and frankly unacceptable — news regarding Clore (Clore.ai).

The Clore team has unilaterally ended mining and migrated the project to an ERC token. Mining beyond block 1,584,180 is completely pointless — everything mined after that block belongs to a fork that is not supported by any exchange.

What makes this situation especially troubling is how it was handled. The Clore developers never contacted mining pools in any way. There were:

• no advance warnings,
• no technical notices,
• no timelines or transition plans.

As a result, a huge number of miners and pools unknowingly continued mining a worthless fork. The only communication from the Clore team was an after-the-fact message on Twitter saying “thanks to the miners” — a platform that many miners do not even follow.

This approach is deeply disappointing. This is not how things are done, and it is not how you treat the pools and miners who secured and supported your network.

As a direct consequence:

• all Clore pools were shut down immediately;
• no further payouts are possible;
• a significant amount was already paid out into a worthless, unsupported fork.

This situation came as a shock to us as well. While we sincerely apologize to all affected miners, the responsibility for what happened lies entirely with the Clore.ai management and development team.

Please switch to mining other coins as soon as possible. Use 2CryptoCalc to find suitable alternatives based on your hardware.

Kaspa (KAS) Block Reward Reduction

In accordance with the Kaspa Tokenomics, the Crescendo Hard Fork, and the official emission schedule, Kaspa underwent another scheduled block reward reduction in December.

• Previous Reward: 3.89 KAS
• New Reward: 3.67 KAS

Please pay attention! Kaspa mining profitability has changed accordingly. We have already updated 2CryptoCalc so you can accurately recalculate your expected доходность.

Year-End Recap: Crypto Mining in 2025

As 2025 comes to an end, it is clear that crypto mining continues to evolve — not always in easy or predictable ways.

Unfortunately, many small and poorly managed cryptocurrencies did not survive this year. Lack of communication, weak development, and unprofessional handling of major changes led to the shutdown of multiple mining projects.

At the same time, new projects continue to emerge, and some established coins saw renewed interest. One of the most notable examples is Zcash. In 2025, ZEC attracted miners again as its price surged by nearly ten times compared to previous lows. This price growth made even older ASIC hardware profitable once more.

Remarkably, machines like the Antminer Z11 — originally released back in 2019 — returned to profitability thanks to improved market conditions. We will include a price and profitability chart here to illustrate this shift.

Despite all challenges, mining remains very much alive. It continues to reward those who stay informed, react quickly, and choose projects carefully.

Thank you for being with 2Miners throughout 2025. We wish you a Happy New Year, stable networks, strong uptime, and successful mining in 2026!

Setting up the GRIM wallet for Grin cryptocurrency

Transactions on the GRIN blockchain are of the P2P or peer-to-peer type; you can read more about this in this article on the GRIN wiki. Therefore, if your wallet is unavailable, the pool cannot send the payout.

Wallet availability can be checked using this tool. If your wallet is currently unavailable, the following message will appear:

The window of a normally functioning Grin++ wallet, ready to accept an incoming transaction, looks as follows:

• in the bottom left corner of the wallet window, the internal node status must be “Running”;
• the wallet must have incoming peers (indicated in the bottom right corner of the wallet window).

Also, the tor.exe process must have incoming and outgoing traffic.

If you are unable to configure the Grin++ wallet to receive payouts from the pool, we recommend using the GRIM wallet. To download the wallet, go to the “Downloads” section and select the version for your operating system:

Next, run the downloaded file and follow the installer’s instructions.

Launch the GRIM wallet. To create a new wallet or restore an existing one from a saved seed phrase, click the “Add Wallet” button.

In the mobile version, it looks like this.

Next, enter a name for the wallet, create a password, and click “Continue”.

In the mobile version:

To create a new wallet, select the “Create” option, write down your seed phrase, and click “Continue”:

In the mobile version:

To restore an existing wallet from a saved seed phrase, select the “Restore” option, enter the seed phrase, and click “Continue”.

In the mobile version, the process is as follows:

If you used a seed phrase from the Grin++ wallet, your address in the GRIM wallet will match the address in the Grin++ wallet.

Next, you need to choose how to connect your wallet to the network. We recommend choosing the external connection grincoin.org:

In the mobile version:

Wait for the wallet to load and go to the “Transport” tab:

In the mobile version:

In the “Transport” tab, you must enable Tor and wait for the connection:

In the mobile version:

After Tor connects, its status will change to “Connected”, and your address will be highlighted in green:

In the mobile version:

This completes the setup of the GRIM wallet for receiving GRIN payouts from the pool. Your address is now available to receive payouts. We check the availability of your wallet using this tool and see the following message:

Do not close or change your wallet settings until the payout has been received. Typically, a new payout round for the GRIN pool begins every 6 hours.

Zcash Network Upgrade NU6.1 Activated

The Zcash network successfully activated NU6.1 in November 2025, following the release of zcashd v6.10.0. This upgrade was endorsed by both the Electric Coin Company and the Zcash Foundation and introduced a new long-term funding model that separates the roles of the Community and ZEC coinholders.

The new funding structure allocates:

• 8% of all block rewards to Zcash Community Grants (ZCG), supporting community-driven initiatives.
• 12% of block rewards to a new Coinholder-Controlled Fund. This fund is governed directly by ZEC coinholders and may be used to distribute grants to ecosystem contributors or remain untouched for future decisions.

This model will remain active until the 3rd Zcash halving, allowing the community to evaluate whether it should be extended or revised.

NU6.1 also included several protocol updates and ZIP changes:

New ZIPs

• ZIP 255: Deployment of the NU6.1 Network Upgrade
• ZIP 271: Dev Fund Extension and One-Time Disbursement
• ZIP 1016: Community and Coinholder Funding Model

Updated ZIPs

• ZIP 214: Consensus rules for a Zcash Development Fund

Alongside funding changes, NU6.1 also improved RPC balance reporting for shielded transactions and introduced transaction version v5 as the new default format.

CKB Client Update: Version 0.203.0 Released

The Nervos CKB team released CKB 0.203.0 (commit 88d1126, dated 2025-10-22), bringing a series of new features, bug fixes, and performance improvements. This update enhanced network stability and optimized several internal components used by full nodes and light clients.

Key Features

• #4891: Added hole punching protocol metrics
• #4888: Introduced two outbound block-relay-only connections for improved network propagation
• #4910: Implemented from/into conversions for gen-type
• #4920: Enhanced scriptHashType serialization logic

Bug Fixes

• #4895: Corrected error handling in add_node and remove_node calls within NetRpcImpl

Improvements

• #4970: Disabled default features for strum dependency
• #4946: Improved rich-indexer stability by ensuring RocksDB SecondaryDB stays synchronized before read operations
• #4972: Limited the size of the filters field in BlockFilters messages to 1.8 MB to prevent node disconnects caused by oversized frames

These changes improve overall network reliability and reduce the likelihood of full nodes disconnecting light clients due to oversized filter messages.

Kaspa (KAS) Block Reward Reduction

As defined by the Kaspa Tokenomics, the Crescendo Hard Fork, and the official Emission Schedule, Kaspa underwent another scheduled block reward reduction in November.

• Previous Reward: 4.12 KAS
• New Reward: 3.89 KAS

Please pay attention! Mining profitability for Kaspa has changed. We have already updated 2CryptoCalc to reflect the new reward values.

Stay Updated

That concludes the November 2025 updates. Follow us on X (Twitter) and join the discussion on Telegram to stay informed about new developments, miner alerts, and network upgrades.

Flux (ZelCash) Mining Ends – Pool Shutdown Completed

On October 20, 2025, mining for Flux (formerly ZelCash) officially ended on 2Miners. This was due to Flux migrating away from traditional Proof-of-Work (PoW) mining to the new Proof-of-Useful-Work v2 (PoUW v2) model via Proof of Nodes (PON).

Our Flux mining pools were shut down at 19:00 UTC on October 20 to ensure that all final payouts could be processed before block 2,020,000, at which point the chain hard-forked and traditional mining stopped entirely.

All balances above the minimum threshold of 10 FLUX were successfully paid out.

We’re sad to see Flux go, but if you’re looking for a new coin to mine, use 2CryptoCalc to find the most profitable options for your hardware.

Zcash (ZEC) Node Update – v6.10.0

The Zcash 6.10.0 release brings support for the upcoming NU6.1 network upgrade, which is scheduled to activate at block height 3,146,400 — expected around November 23, 2025.

All node operators must upgrade to v6.10.0 or later to remain compatible with the mainnet after the activation of NU6.1.

Included ZIPs (Zcash Improvement Proposals):

• ZIP 271 – Deferred Dev Fund Lockbox Disbursement:
  This proposal creates a new Zcash Development Fund, managed through a lockbox system. The lockbox contains funds reserved for future network development, ensuring a consistent, transparent, and long-term funding mechanism for Zcash’s ongoing improvements. The fund includes all existing resources from the earlier Deferred Development Fund Lockbox (ZIP 1015) and future allocations that may accrue over time.
• ZIP 1016 – Community and Coinholder Funding Model (partial):
  This proposal focuses on decentralizing decision-making and strengthening the governance model around Zcash funding. It aims to increase transparency and give coinholders a more direct voice in how development funds are used. Without this update, block subsidies for the Zcash Community Grants and the Deferred Development Fund Lockbox (ZIP 2001) would have expired in November 2025, risking a funding gap for Zcash development organizations.
  The changes introduced ensure funding continuity, clarify governance structures, and make the process more dynamic and accountable to the Zcash community.

These updates are critical for maintaining long-term project sustainability and restoring investor confidence. As a result of the NU6.1 upgrade announcement, ZEC saw a significant price increase — rising from roughly $130 to $443 within one month — making Zcash mining more profitable than it has been in years.

Reward Reductions Across Coins

Heads up! Several coins experienced scheduled block reward reductions in October. We’ve updated 2CryptoCalc to reflect the new values so you can calculate your mining returns accurately.

KASPA (KAS) Block Reward Reduction

As part of the Kaspa Crescendo Hard Fork and emission schedule, the KAS block reward has been reduced:

• Previous reward: 4.37 KAS
• New reward: 4.12 KAS

ERGO (ERG) Block Reward Reduction

Following the Ergo Tokenomics and Emission Schedule, ERG mining rewards have decreased:

• Previous reward: 12 ERG
• New reward: 9 ERG

As always, check 2CryptoCalc to see the updated profitability for your mining rigs.

That wraps up October 2025. Stay connected with us via X (Twitter) and our Telegram miner community for all the latest news and support. Happy mining!

Reward Reductions on Major Coins

Please pay attention! Several coins have undergone scheduled block reward reductions this month. As always, we’ve updated 2CryptoCalc to reflect the new reward values so you can plan your mining strategy accordingly.

KASPA (KAS)

In accordance with the KASPA Tokenomics, the Kaspa Crescendo Hard Fork, and the KASPA Emission Schedule, the block reward has been reduced:

• Previous Reward: 4.62 KAS
• New Reward: 4.37 KAS

Karlsen (KLS)

In accordance with the Karlsencoin Tokenomics, the block reward was reduced as expected:

• Previous Reward: 28.89 KLS
• New Reward: 28.09 KLS

Check updated profitability estimates on 2CryptoCalc.

ETC Mining Stopped on Some iPollo ASICs – Firmware Released

Attention Ethereum Classic (ETC) ASIC miners!

Several iPollo devices — including iPollo V2 / V2x / V2h — stopped mining ETC after block #23,100,000 due to issues related to DAG Epoch 385.

We’ve seen this problem before — it’s related to the DAG file size growing beyond what some mining hardware can handle. This was extensively covered in our older Ethereum articles, such as:

When Will My Graphics Card Stop Mining ETH?

Thankfully, iPollo has acknowledged the issue and released a firmware update to resolve it. If your device stopped mining ETC, please update the firmware immediately:

Download iPollo V2 Series Firmware

After updating, your device should resume normal ETC mining operations.

That wraps up September 2025. Stay connected on X (Twitter) and Telegram for more news, alerts, and support. Happy mining!

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.

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!

• Pool: zec.2miners.com
• Solo: solo-zec.2miners.com

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:

• This release includes voting code for the soft-fork.
• Nodes will automatically vote in favor of EIP-50 starting at block height 1,561,601.
• To opt out of voting, update your configuration with:

  ergo {
    ...
    voting {
      120 = 0
      ...
    }
  }
  

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!

• Algorithm: Cuckatoo31
• Pool: mwc.2miners.com
• Solo: solo-mwc.2miners.com

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!