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Introducing Phage

Programmable Transaction Middleware for Ethereum Nodes

Phage is a rust based library that provides programmable transaction middleware for Ethereum nodes

Current transaction broadcasting infrastructure is passive

Existing protection tools are concentrated on the wallet layer

Phage modules enable nodes to make automated decisions

With Phage you can build…

✅ Custom RPC methods
✅ Intelligent transaction routing
✅ Real time threat interception
✅ Invisible policy enforcement & alerting

Build modules in 3 steps

Define the services

Define the rules

Install on your node

Modules contain hooks for external services

Rules are defined using Banyan

The declarative policy language for modules based on Cedar by AWS

Define transaction rules based on decoded & enriched transaction data

@name("WARN-NATIVE-ASSET-THRESHOLD")
@advice("Warn when sending funds over X threshold")
@notification("WEBHOOK-e03a0aa1")
forbid (
  principal,
  action == Action::"EOATransaction",
  resource
)
when { context.value.u256GreaterThan(principal.valueLimit) };

Use modules to dynamically route & bundle transactions

Enrich MPC transaction services with policies & detailed context

Intercept threats with external datasets & AI models

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