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以太坊研究日报

Ethereum Research Daily

A quiet Saturday. PRs that open the abstracts of EIP-8250 (keyed nonces) and EIP-8272 (recent roots) with their privacy benefit were merged, and another PR fills in code for EIP-8272's recent root contract so the path can be tested end to end. On ethresear someone posted a reference design for zero-knowledge-proof-gated settlement of x402 agent payments, and AndyGuzman argued that infrastructure such as RPCs, indexers and bundlers needs privacy to avoid regulatory pressure.

Image for August 8, 2026

Image: ethresear.ch, Atomic ZK-Proof-Gated Settlement for x402 Agent Payments

Moving the keyed nonce and recent root specs forward

EIP-8272: specify RECENT_ROOT_CODE

(AnkushinDaniil), submitted. Per the PR, `RECENT_ROOT_CODE` is currently TBD, so the recent root contract has fully specified behavior and no code implementing it; a client installing the predeploy today installs an empty account, every write is a plain value transfer that commits nothing, and every later reference fails its check. The PR assembles the code directly from the spec and fills in the constant.

https://github.com/ethereum/EIPs/pull/12131

Payments and infrastructure privacy

ethresear.ch: atomic ZK-proof-gated settlement for x402 agent payments

01:47. The author notes that x402 lets an agent pay for a resource call but never binds payment to correct execution; the ZkInferenceEscrow reference design settles payment for an AI inference call in one transaction, only when an onchain zero-knowledge proof verifies the call ran on a specific pinned circuit.

https://ethresear.ch/t/atomic-zk-proof-gated-settlement-for-x402-agent-payments-a-measured-reference-design/25660

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