Why an AI agent making 1,000 micro-transactions a minute cares about whose lane it drives in
· 블록스페이스 경합 문제와 Linera의 마이크로체인 해법
1. The picture 한눈에 보는 구조
Shared L2 (e.g. Base)
All apps bid for the same blockspace. A viral mint raises gas for everyone —
including your agent. 남의 이벤트가 내 에이전트 비용을 올림 = 블록스페이스 경합.
Linera microchains
Each user/app gets its own microchain — "a private driveway to the destination."
Other chains' congestion never touches yours. 성능은 격리, 보안은 공유.
2. How a tx flows — sequence 트랜잭션 흐름 비교
On a single-owner microchain the owner proposes blocks directly — there is no mempool
competition to price you out. 멤풀 경쟁·가스 경매 자체가 없음. 체인 간 상호작용은 비동기 메시지.
3. Side-by-side 비교표
Shared L2 (Base 등)
Linera
Blockspace
One lane shared by all apps
One microchain per user/app — elastic, created on demand
Fee behavior
Global gas auction → spikes on others' activity
Isolated per chain → flat, predictable (key for micro-tx agents)
Latency under load
Degrades for everyone
Unaffected by other chains' load
Security
Shared sequencer/L1 settlement
Same validator set secures all microchains — isolation is of performance, not security
Cross-app calls
Synchronous, same block (composability)
Async messages between microchains — composability is the trade-off
Programming model
EVM / Solidity — huge ecosystem
Rust / Wasm SDK — young ecosystem
Maturity
Production, deep liquidity
Early stage (testnet era) — evaluate before depending on it
4. Why this matters for agent payments 에이전트 결제와의 연결
An x402-style agent (see ap2-test / agentic-aa in docs/features/) making
1,000 micro-payments a minute needs flat, predictable fees — a $0.01 data purchase
can't tolerate a $0.30 gas spike caused by someone's meme coin. Shared-blockspace L2s make agent
economics hostage to unrelated traffic; per-app chains (Linera microchains — or, less
radically, an app-dedicated rollup/subnet like §17's Avalanche Evergreen) restore cost isolation.
마이크로 결제 에이전트의 손익은 수수료 예측 가능성에 달려 있음 — 공유 블록스페이스에선 남의 트래픽이
내 원가를 결정. 전용 체인(마이크로체인/서브넷/앱 롤업)이 이를 격리함.
Spectrum, not binary: cost isolation comes in degrees —
shared L2 → app-dedicated rollup/subnet (Avalanche Evergreen, §17) → per-user microchain
(Linera). Linera is the extreme end: even your app's other users can't congest you.
5. One-line takeaway 한 줄 요약
Shared blockspace means shared congestion; Linera gives every user their own lane —
performance isolated, security still shared.
공유 블록스페이스는 혼잡도 공유를 뜻한다; Linera는 사용자마다 전용 차선을 주어
성능은 격리하고 보안은 계속 공유한다.