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Pectra EIP-7691 · blob doubling and the L2 economic chain

Confidence: Certain Updated 2026-05-26 Review by 2026-09-22 Sources 1 Machine-translated Original (JA)
#systems#ethereum#l2#eip-7691#blob#base
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This entry sits under systems index. Read it against Ethereum Pectra Upgrade · 4 EIP Dual-Track Strategy Overview for peer / contrast context and fintech index for the broader system / regulatory boundary.

Key facts

  • After Dencun, blob target=3 / max=6
  • After Pectra, target=6 / max=9 (doubling)
  • L2 calldata cost falls by roughly -50%
  • User gas on Base / Arbitrum / Optimism falls at the same time
  • USDC settlement on Stripe Base / Coinbase Smart Wallet experience improves
  • Economic competition between L2 and L1 intensifies · capital flows at both ends

Mechanism / How it works

Introduced with Dencun (2024-03), EIP-4844 blob is a temporary storage slot designed specifically for rollup data availability. Its price is independent of ordinary calldata, and it sharply reduced L2 submission costs. But Dencun’s initial target=3 blobs/block (every 12 seconds) was quickly filled by high-throughput L2 s such as Base + Arbitrum + Optimism. Pectra EIP-7691 doubles target / max — target=6 / max=9 , letting L2 carry 2 times the data volume without blob fee spikes, with the direct result that L2 calldata cost is -50%. Stripe USDC settlement on Base and Coinbase Smart Wallet’s sub-cent experience improve further. Sequencer revenue falls as gas unit prices decline, but higher user activity can offset it; the net effect depends on elasticity. Together with EIP-7251 , it forms the dual track of “L1 thickening (2048 ETH staking) + L2 expansion (blob doubling).”

Origin & evolution

2024-03 Dencun launched · EIP-4844 blob was the first step of the rollup-centric roadmap. From 2024-Q2 , L2 s such as Base / Arbitrum / Optimism came under pressure in the blob fee market · frequently reaching max=6 → blob fee spikes → higher gas felt by L2 users. Discussion on EthMagicians accelerated target doubling for EIP-7691 . In 2024-Q3-Q4 ACD, inclusion of 7691 in the Pectra bundle was confirmed. Within weeks after 2025-Q2 mainnet activation, actual user gas on Base / Arbitrum / Optimism fell by 30-50%. The economics of Stripe’s USDC settlement on Base continued to improve (in contrast to USD Stablecoin Interchange Market‘s flow distribution on L2 ) · Coinbase Smart Wallet achieved a “near-zero gas” experience. In the next step, Fusaka (planned for 2026-Q4 ), PeerDAS further decouples blobs from P2P broadcast and can theoretically expand by several times more.

Sources