Reward Verification Moves to Testnet
P2Pool V2 is developing a decentralized crypto mining protocol in which several participating nodes, rather than a single pool operator's server, verify a miner's submitted work and compute its rewards. According to the project's official site, the Proof of Work verification layer, share accounting and direct payout through the block reward transaction are already running on testnet, while share trading for smaller miners is still being built. The team says it intends to test the system thoroughly on testnet before any mainnet launch. The move comes at a time when pool concentration is a live concern: after an SBI-affiliated mining pool suspended service, the three largest pools together held 60% of the network's hashrate. The work also arrives as Bitcoin ($BTC) price action stays quiet over the weekend and mining centralization returns to the technical debate. P2Pool V2's technical documentation is explicit about where the current stack falls short. Stratum V2 and DATUM widen block-construction choice, letting miners pick which transactions go into a block, yet share calculation and payout distribution still sit on the pool operator's server. The new share chain is designed to remove that residual centralization by making verification of each miner's work, the accounting behind it and the payment itself collective functions performed by participating nodes. In practice, the testnet deployment covers the accounting chain and the block reward transaction that pays miners directly from found blocks, the two capabilities a traditional pool keeps under its own control. Not yet running is the retail side, which would let small miners trade accumulated shares instead of waiting for direct payouts. The project frames that gap as sequencing, with share-market features next in line once the core verification loop proves itself.
Addressing the Limits of the Original P2Pool
A mining pool aggregates many miners' computing power to find blocks and splits the reward among them, which is the accounting layer where centralization tends to concentrate. The original P2Pool pioneered node-verified mining but encountered scale limits that its developers now describe candidly. As the pool grew, shares that failed to make it onto the main share chain accumulated, and the hashrate information shown to miners became inaccurate. The block reward transaction also capped how many payout recipients it could carry, which constrained how many miners could be paid directly from a single found block. P2Pool V2 is designed to address both problems. Each miner receives an individually adjusted share submission difficulty, and shares that arrive late, or nearly simultaneously with another submission and end up orphaned off the share chain, are still counted in the reward calculation rather than discarded. The payout architecture is split by size. Miners whose accumulated work share is large enough receive payment directly inside the block reward transaction. Everyone else sells their share-chain output to market makers, effectively a liquidity pool for share sales, and receives Bitcoin ($BTC) in return. This mechanism matters more as each Bitcoin halving cuts the per-block subsidy and squeezes the margins small miners operate on. Still under development are the features that would complete the market: routine share trading, atomic swaps using the Lightning network and Ark, and a dedicated share wallet for holding and moving mining positions. The project treats the full testnet cycle as a precondition for mainnet, and no activation date has been announced.
The Node Requirement Persists After the Redesign
The redesign moves verification, accounting and payment away from the operator, but one dependency remains: the work-delivery path. P2Pool V2's own materials draw the distinction clearly. Running a personal node gives a miner end-to-end control, while connecting to someone else's node leaves job distribution in that third party's hands even when the miner manages the reward wallet directly. Compared with Stratum V2 and DATUM, which widened block-construction choice while leaving share accounting on operator servers, V2 targets the deeper layer. Compared with the original P2Pool, it addresses the orphaning and display limits that curbed adoption at scale. What it cannot do, in any configuration, is lift the miner's operational burden, since self-hosting a node is the price of the control the protocol promises. Until share trading, Lightning and Ark swaps and share wallets ship, the market side that small miners need remains closed, and the testnet-first approach leaves the mainnet timetable open.
