# 🔥 Native ECAI in Bitcoin Core: Mempool Filtering Made Deterministic

For years, Bitcoin’s mempool has been the **wild west**: every node with its own quirks, policies buried deep in code, no way to prove why a transaction was dropped or accepted.

Today that changes.

With **ECAI (Elliptic Curve AI)** we can plug directly into Bitcoin Core with a **single minimal hook**:

* **Policy Commitment** → encoded once into an elliptic curve point.

* **Feature Commitment** → each transaction becomes a deterministic byte vector, also mapped to the curve.

* **Verdict** → accept / reject / queue, signed by the node.

* **Audit Trail** → ZMQ + RPC output, verifiable by anyone.

All without touching consensus, without rewriting the mempool.

Just one branch in `AcceptSingleTransaction()`, one module in `src/ecai/`, and a new ZMQ topic.

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## Why it matters

🔹 **Regulators** get proof: every mempool decision is cryptographically reproducible.

🔹 **Miners** get compliance attestation they can publish daily.

🔹 **Institutions** get aligned behaviour across nodes — no more “shadow rules.”

🔹 **Developers** keep Core clean: off by default, no consensus changes.

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## The new dynamic

Mempool filtering is no longer subjective “node gossip.”

It’s a **service layer**: deterministic, auditable, regulator-grade.

👉 Bitcoin Core can emit *verdict proofs* just as easily as it emits block headers.

👉 The fog clears. The mempool becomes law.

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I’ll say it again: **one minimal change** in Bitcoin Core turns the mempool into a verifiable public utility.

This is what **ECAI Mempool Filtering as a Service (MFaaS)** looks like in practice.

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