Arnab Mitra arnabmitra

Introduction

EigenLayer introduces the possibility of re-using ethereum consensus, and IMO the most interesting usecase for that would be building a decentralized two-way and security-optimal bridge between Bitcoin and Ethereum.

All bridges rely on the security of the two chains they connect and the security of the custodian^[1] used for bridging, since if the security of any of those 3 were to fail, it would be possible to drain the bridge (eg: if its possible to double-spend on any of the two chains an attacker can redeem the same coin multiple times).

However, if a significant amount of the total ETH staked were to be restaked securing this bridge, the custodian would be piggybacking on ethereum security, so those two become the same and thus you'd remove the custodian from your list of dependencies and you're left with only having to depend on the security of the two chains, which is the theoretical ceiling of security. In other words, you'd achieve the best possible security.

But not just that, you

Custom HTTP Routing in Go

Basic Routing

Responding to requests via simple route matching is built in to Go's net/http standard library package. Just register the path prefixes and callbacks you want invoked and then call the ListenAndServe to have the default request handler invoked on each request. For example:

package main

import (

	# =========
	# demo: https://github.com/JetBrains/Exposed/tree/master/src/test/kotlin/demo
	# dml tests: https://github.com/JetBrains/Exposed/blob/master/src/test/kotlin/org/jetbrains/exposed/sql/tests/shared/DMLTests.kt

	# ===== GIS

	https://github.com/JetBrains/Exposed/issues/459

	# === native

	// AES Encryption/Decryption with AES-256-GCM using random Initialization Vector + Salt
	// ----------------------------------------------------------------------------------------
	// the encrypted datablock is base64 encoded for easy data exchange.
	// if you have the option to store data binary save consider to remove the encoding to reduce storage size
	// ----------------------------------------------------------------------------------------
	// format of encrypted data - used by this example. not an official format
	//
	// +--------------------+-----------------------+----------------+----------------+
	// \| SALT \| Initialization Vector \| Auth Tag \| Payload \|
	// \| Used to derive key \| AES GCM XOR Init \| Data Integrity \| Encrypted Data \|

	import java.security.KeyPair;
	import java.security.KeyPairGenerator;
	import java.security.SecureRandom;
	import java.security.Signature;
	import java.security.SignatureException;
	import java.security.spec.ECGenParameterSpec;
	import javax.crypto.Cipher;
	import org.bouncycastle.jce.spec.IEKeySpec;
	import org.bouncycastle.jce.spec.IESParameterSpec;

	package spring;

	import org.springframework.beans.factory.annotation.Autowired;
	import org.springframework.beans.factory.annotation.Qualifier;
	import org.springframework.context.annotation.AnnotationConfigApplicationContext;
	import org.springframework.context.annotation.ComponentScan;
	import org.springframework.context.annotation.Configuration;
	import org.springframework.stereotype.Component;

	import javax.annotation.PostConstruct;

	package com.jelies.spring3tomcat7.config.quartz;

	import org.quartz.spi.TriggerFiredBundle;
	import org.springframework.beans.factory.config.AutowireCapableBeanFactory;
	import org.springframework.context.ApplicationContext;
	import org.springframework.context.ApplicationContextAware;
	import org.springframework.scheduling.quartz.SpringBeanJobFactory;

	/**
	* This JobFactory autowires automatically the created quartz bean with spring @Autowired dependencies.