- Polygon activated the Rio hard fork, overhauling block production and adding stateless verification to reduce latency and hardware load.
- The upgrade shifts block production to a validator-elected producer set to eliminate reorganisations and tighten block intervals, which enhances transaction finality.
- Rio introduces PIP-72 for witness-based stateless checks, allowing nodes to validate transactions without holding the full state, thus lowering hardware requirements and speeding up sync.
Polygon has activated Rio, a hard fork that overhauls block production and adds stateless verification to cut latency and hardware load for payments and real-world asset flows.
According to a blog post, block production now shifts to a validator-elected producer set, with one elected producer proposing longer stretches while designated alternates stand by. Polygon says this design removes reorganisations and tightens block intervals. Fee flow, including captured MEV, is reshaped so non-producing validators remain paid.
Reorgs can weaken finality. It’s basically when two blocks at the same height propagate at once, splitting the network until one branch wins and the other’s transactions are rolled back. A good example of this is Monero, which suffered 118 reversed transactions recently.
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Rio Upgrade
Rio is part of the “GigaGas” track. The near-term throughput target is around 5,000 TPS. Major exchanges, including Binance, paused POL deposits and withdrawals during the cutover.
The upgrade introduces three Polygon Improvement Proposals (PIP). Notably, PIP-72, the last of the three, introduces witness-based stateless checks, so nodes can validate without holding full state, lowering machine requirements and speeding sync.
Polygon remains Ethereum-aligned and payments-centric, with AggLayer and zero-knowledge (ZK) initiatives in the stack. Total value locked sits near US$1.2 billion (AU$1.86 billion), ranking 13th by TVL.
The upgrade follows Polygon’s stability incidents over the summer, including an emergency fork for finality delays in September and a one-hour validator-linked outage in late July.
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