diff --git a/.envrc b/.envrc
new file mode 100644
index 00000000..1beec72b
--- /dev/null
+++ b/.envrc
@@ -0,0 +1,24 @@
+#!/usr/bin/env bash
+
+# Reload if any of these files change
+watch_file nix/*
+watch_file .envrc.local
+
+# Build a folder that contains all the tools
+nix-build ./nix -A env --out-link ./env
+
+# source .profile from `$env`.
+# This is only used to set things interpolated by nix.
+# All *static* things should live inside .envrc.
+source_env ./env/.profile
+
+# used by docker-compose to run processes with the same user ID mapping
+HOST_UID=$(id -u)
+HOST_GID=$(id -g)
+export HOST_UID HOST_GID
+
+# set protoc path from nix env
+export PROTOC_PATH=$(readlink -f ./env/bin/protoc)
+
+# allow local .envrc overrides
+[[ -f .envrc.local ]] && source_env .envrc.local
diff --git a/.gitignore b/.gitignore
index a2988251..c520b309 100644
--- a/.gitignore
+++ b/.gitignore
@@ -8,4 +8,7 @@ testsetup/
 .idea_modules/
 *.iml
 *.ipr
-*.iws
\ No newline at end of file
+*.iws
+
+# nix
+env
\ No newline at end of file
diff --git a/build.gradle b/build.gradle
index 76cb14d7..330471dc 100644
--- a/build.gradle
+++ b/build.gradle
@@ -1,19 +1,10 @@
+import io.gitlab.arturbosch.detekt.Detekt
+
 import java.time.Instant
 import java.time.ZoneId
 import java.time.format.DateTimeFormatter
 import java.time.temporal.ChronoUnit
 
-buildscript {
-    repositories {
-        mavenLocal()
-        mavenCentral()
-    }
-    dependencies {
-        classpath 'org.jetbrains.kotlin:kotlin-gradle-plugin:1.5.30'
-        classpath 'com.google.protobuf:protobuf-gradle-plugin:0.8.12'
-    }
-}
-
 plugins {
     id 'java'
     id 'groovy'
@@ -21,13 +12,13 @@ plugins {
     id 'application'
     id 'jacoco'
 
-    id 'org.jetbrains.kotlin.jvm' version '1.3.70'
-    id 'com.google.cloud.tools.jib' version "2.5.0"
-    id 'org.springframework.boot' version '2.3.5.RELEASE'
-    id 'io.spring.dependency-management' version '1.0.6.RELEASE'
-    id 'com.palantir.git-version' version '0.12.2'
-    id "com.google.protobuf" version "0.8.12"
-    id "org.jlleitschuh.gradle.ktlint" version "10.2.0"
+    alias(libs.plugins.kotlin)
+    alias(libs.plugins.jib)
+    alias(libs.plugins.spring)
+    alias(libs.plugins.git)
+    alias(libs.plugins.protobuf)
+    alias(libs.plugins.ktlint)
+    alias(libs.plugins.detekt)
 }
 
 
@@ -35,7 +26,7 @@ group = 'io.emeraldpay.dshackle'
 
 // Version schema:
 //    x.x.x for production, following SemVer model
-//    x.x-SNAPSHOT for development
+//    x.x.x-SNAPSHOT for development
 version = '0.11.0-SNAPSHOT'
 
 java {
@@ -46,7 +37,6 @@ java {
 repositories {
     mavenLocal()
     mavenCentral()
-    jcenter()
     maven { url "https://repo.spring.io/snapshot" }
     maven { url "https://repo.spring.io/milestone" }
     maven { url "https://maven.emrld.io" }
@@ -62,81 +52,51 @@ configurations {
 }
 
 dependencies {
-    implementation "io.emeraldpay:emerald-api:0.10.0"
+    implementation libs.bundles.kotlin
 
-    implementation "io.grpc:grpc-protobuf:${grpcVersion}"
-    implementation "io.grpc:grpc-stub:${grpcVersion}"
-    implementation "io.grpc:grpc-netty:${grpcVersion}"
-
-    implementation "io.netty:netty-transport:$nettyVersion"
-    implementation "io.netty:netty-common:$nettyVersion"
-    implementation "io.netty:netty-handler:$nettyVersion"
-    implementation "io.netty:netty-handler-proxy:$nettyVersion"
-    implementation "io.netty:netty-resolver:$nettyVersion"
-    implementation "io.netty:netty-resolver-dns:$nettyVersion"
-    implementation "io.netty:netty-codec:$nettyVersion"
-    implementation "io.netty:netty-codec-http2:$nettyVersion"
-    implementation "io.netty:netty-codec-http:$nettyVersion"
-    implementation "io.netty:netty-buffer:$nettyVersion"
-    implementation "io.netty:netty-tcnative:2.0.39.Final"
-    implementation "io.netty:netty-tcnative-boringssl-static:2.0.39.Final"
-
-    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk8"
-    implementation "org.jetbrains.kotlin:kotlin-reflect"
-
-    implementation("org.springframework.boot:spring-boot-starter:$springBootVersion") {
+    implementation libs.bundles.grpc
+    implementation libs.bundles.netty
+    implementation(libs.bundles.spring.framework) {
         exclude module: 'spring-boot-starter-logging'
     }
-    implementation "org.springframework.security:spring-security-core:$springSecurtyVersion"
-    implementation "org.springframework.security:spring-security-web:$springSecurtyVersion"
-    implementation "org.springframework.security:spring-security-config:$springSecurtyVersion"
-    implementation "io.projectreactor:reactor-core:$reactorVersion"
-    implementation "io.projectreactor.netty:reactor-netty:1.0.11"
-    implementation 'io.projectreactor.addons:reactor-extra:3.4.5'
-    implementation 'io.projectreactor.kotlin:reactor-kotlin-extensions:1.1.4'
-    implementation "com.salesforce.servicelibs:reactor-grpc-stub:$reactiveGrpcVersion"
-    implementation 'io.micrometer:micrometer-registry-prometheus:1.5.6'
-    implementation 'io.lettuce:lettuce-core:5.2.2.RELEASE'
 
-    implementation "io.emeraldpay.etherjar:etherjar-domain:$etherjarVersion"
-    implementation "io.emeraldpay.etherjar:etherjar-hex:$etherjarVersion"
-    implementation "io.emeraldpay.etherjar:etherjar-rpc-api:$etherjarVersion"
-    implementation "io.emeraldpay.etherjar:etherjar-rpc-http:$etherjarVersion"
-    implementation "io.emeraldpay.etherjar:etherjar-rpc-ws:$etherjarVersion"
-    implementation "io.emeraldpay.etherjar:etherjar-tx:$etherjarVersion"
-    implementation "io.emeraldpay.etherjar:etherjar-contract:$etherjarVersion"
-    implementation "io.emeraldpay.etherjar:etherjar-erc20:$etherjarVersion"
-    implementation 'org.bitcoinj:bitcoinj-core:0.15.8'
+    implementation libs.bundles.reactor
 
-    implementation 'org.yaml:snakeyaml:1.24'
-    implementation 'org.apache.httpcomponents:httpmime:4.5.8'
-    implementation 'org.apache.httpcomponents:httpclient:4.5.8'
-    implementation "com.fasterxml.jackson.core:jackson-core:$jacksonVersion"
-    implementation "com.fasterxml.jackson.core:jackson-databind:$jacksonVersion"
-    implementation "com.fasterxml.jackson.datatype:jackson-datatype-jdk8:$jacksonVersion"
-    implementation "com.fasterxml.jackson.datatype:jackson-datatype-jsr310:$jacksonVersion"
-    implementation "com.fasterxml.jackson.module:jackson-module-kotlin:$jacksonVersion"
-    implementation 'commons-io:commons-io:2.6'
-    implementation 'org.apache.commons:commons-lang3:3.9'
-    implementation 'org.apache.commons:commons-collections4:4.3'
-    implementation 'javax.annotation:javax.annotation-api:1.3.2'
-    implementation 'org.bouncycastle:bcprov-jdk15on:1.61'
-    implementation 'com.github.ben-manes.caffeine:caffeine:2.8.5'
+    implementation(libs.reactor.grpc.stub)
 
-    implementation "org.slf4j:slf4j-api:$slf4jVersion"
-    implementation "org.apache.logging.log4j:log4j-slf4j-impl:2.11.1"
-    implementation "org.slf4j:jul-to-slf4j:$slf4jVersion"
-    implementation "org.slf4j:jcl-over-slf4j:$slf4jVersion"
+    implementation libs.micrometer.registry.prometheus
+    implementation libs.lettuce.core
 
-    testImplementation 'cglib:cglib-nodep:3.3.0'
-    testImplementation "org.spockframework:spock-core:$spockVersion"
-    testImplementation "io.grpc:grpc-testing:${grpcVersion}"
-    testImplementation "io.projectreactor:reactor-test:$reactorVersion"
-    testImplementation 'org.objenesis:objenesis:3.1'
-    testImplementation 'org.mock-server:mockserver-netty:5.11.2'
-    testImplementation "org.java-websocket:Java-WebSocket:1.5.1"
-    testImplementation "nl.jqno.equalsverifier:equalsverifier:3.3"
-    testImplementation "org.codehaus.groovy:groovy:${groovyVersion}"
+    implementation libs.bundles.etherjar
+
+    implementation(libs.emerald.api) {
+        exclude group: 'com.salesforce.servicelibs', module: 'reactor-grpc'
+    }
+
+    implementation libs.bitcoinj
+
+    implementation libs.snake.yaml
+    implementation libs.bundles.httpcomponents
+    implementation libs.bundles.jackson
+
+    implementation libs.bundles.apache.commons
+    implementation libs.bouncycastle
+    implementation libs.caffeine
+    implementation libs.javax.annotations
+
+    implementation libs.bundles.slf4j
+
+    testImplementation libs.cglib.nodep
+    testImplementation libs.spockframework.core
+    testImplementation libs.grpc.testing
+    testImplementation libs.reactor.test
+    testImplementation libs.objgenesis
+    testImplementation libs.mockserver.netty
+    testImplementation libs.java.websocket
+    testImplementation libs.equals.verifier
+    testImplementation libs.groovy
+
+    detektPlugins libs.detekt.formatting
 }
 
 compileKotlin {
@@ -173,7 +133,7 @@ test {
 }
 
 application {
-    mainClassName = 'io.emeraldpay.dshackle.StarterKt'
+    getMainClass().set('io.emeraldpay.dshackle.StarterKt')
 }
 
 jib {
@@ -192,8 +152,8 @@ jib {
                 '/dshackle:',
                 'snapshot'
         ].join('')
-        tags = [project.version].with (true) {
-            add "t"+ DateTimeFormatter.ofPattern("yyyyMMddHHmm").withZone(ZoneId.of('UTC')).format(Instant.now())
+        tags = [project.version].with(true) {
+            add "t" + DateTimeFormatter.ofPattern("yyyyMMddHHmm").withZone(ZoneId.of('UTC')).format(Instant.now())
             add project.version.toString().replaceAll('(\\d+\\.\\d+).+', '$1')
         }
         auth {
@@ -202,9 +162,7 @@ jib {
         }
     }
     container {
-        jvmFlags = [
-                '-Xms1024m',
-        ]
+        jvmFlags = ['-Xms1024m']
         mainClass = 'io.emeraldpay.dshackle.StarterKt'
         args = []
         ports = ['2448', '2449', '8545']
@@ -212,7 +170,7 @@ jib {
 }
 
 jar {
-    enabled=true
+    enabled = true
 }
 
 afterEvaluate {
@@ -222,7 +180,11 @@ afterEvaluate {
 }
 
 protobuf {
-    protoc { artifact = "com.google.protobuf:protoc:${protocVersion}" }
+    protoc {
+        // if $PROTOC_PATH is set then locally installed protoc is used otherwise it is downloaded remotely
+        path = System.getenv("PROTOC_PATH") ?: null
+        artifact = System.getenv("PROTOC_PATH") == null ? "com.google.protobuf:protoc:${libs.versions.protoc.get()}" : null
+    }
     plugins {
     }
     generateProtoTasks {
@@ -235,7 +197,7 @@ sourceSets {
     }
 }
 
-task generateVersion()  {
+task generateVersion() {
     group = 'Build'
     description = 'Generate project version'
 
@@ -267,7 +229,7 @@ tasks.withType(Test) {
         }
     }
     afterTest { TestDescriptor descriptor, TestResult result ->
-        if(result.resultType == org.gradle.api.tasks.testing.TestResult.ResultType.FAILURE){
+        if (result.resultType == org.gradle.api.tasks.testing.TestResult.ResultType.FAILURE) {
             failedTests << "${descriptor.className} > ${descriptor.name}"
             if (!stdout.isEmpty()) {
                 println("-------- ${descriptor.className} > ${descriptor.name} OUTPUT ".padRight(120, "-"))
@@ -278,7 +240,7 @@ tasks.withType(Test) {
     }
 }
 gradle.buildFinished {
-    if(!failedTests.empty){
+    if (!failedTests.empty) {
         println "Failed tests for ${project.name}:"
         failedTests.each { failedTest ->
             println failedTest
@@ -290,8 +252,8 @@ gradle.buildFinished {
 jacocoTestReport {
     dependsOn test
     reports {
-        xml.enabled true
-        html.enabled true
+        xml.required.set true
+        html.required.set true
     }
     afterEvaluate {
         classDirectories.setFrom(files(classDirectories.files.collect {
@@ -301,4 +263,27 @@ jacocoTestReport {
 }
 jacoco {
     toolVersion = "0.8.7"
-}
\ No newline at end of file
+}
+
+detekt {
+    toolVersion = "1.18.1"
+    parallel = false
+    basePath = projectDir
+    debug = false
+    ignoreFailures = true
+
+    reports {
+        xml {
+            enabled = true
+            destination = file("build/reports/detekt/detekt.xml")
+        }
+        html {
+            enabled = true
+            destination = file("build/reports/detekt/detekt.html")
+        }
+    }
+}
+
+tasks.withType(Detekt).configureEach {
+    jvmTarget = "13"
+}
diff --git a/gradle.properties b/gradle.properties
index e67fc02c..974d2f80 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -1,21 +1,3 @@
 kotlin.code.style=official
 
-# Languages
-groovyVersion=2.5.14
-kotlinVersion=1.5.30
-protocVersion=3.9.0
-# Main Libs
-slf4jVersion=1.7.25
-jacksonVersion=2.11.0
-grpcVersion=1.38.0
-reactiveGrpcVersion=1.2.0
-springBootVersion=2.4.5
-springVersion=5.3.6
-springSecurtyVersion=5.4.6
-reactorVersion=3.4.10
-nettyVersion=4.1.65.Final
-# Our Libs
-etherjarVersion=0.11.1
-# Testing
-spockVersion=1.3-groovy-2.5
 
diff --git a/gradle/libs.versions.toml b/gradle/libs.versions.toml
new file mode 100644
index 00000000..98a70932
--- /dev/null
+++ b/gradle/libs.versions.toml
@@ -0,0 +1,132 @@
+[versions]
+detekt = "1.18.1"
+etherjar = "0.11.1"
+groovy = "2.5.14"
+protoc = "3.9.0"
+slf4j = "1.7.25"
+jackson = "2.11.0"
+grpc = "1.38.0"
+reactive-grpc = "1.2.0"
+spring-boot = "2.5.6"
+spring-security = "5.5.3"
+reactor = "3.4.10"
+netty = "4.1.65.Final"
+netty-tcnative = "2.0.39.Final"
+kotlin = "1.5.31"
+httpcomponents = "4.5.8"
+
+[libraries]
+apache-commons-lang3 = "org.apache.commons:commons-lang3:3.9"
+apache-commons-collections4 = "org.apache.commons:commons-collections4:4.3"
+
+bitcoinj = "org.bitcoinj:bitcoinj-core:0.15.8"
+
+bouncycastle = "org.bouncycastle:bcprov-jdk15on:1.61"
+
+caffeine = "com.github.ben-manes.caffeine:caffeine:2.8.5"
+
+commons-io = "commons-io:commons-io:2.6"
+
+cglib-nodep = "cglib:cglib-nodep:3.3.0"
+
+detekt-formatting = { module = "io.gitlab.arturbosch.detekt:detekt-formatting", version.ref = "detekt" }
+
+emerald-api = "io.emeraldpay:emerald-api:0.10.0"
+
+equals-verifier = "nl.jqno.equalsverifier:equalsverifier:3.3"
+
+etherjar-domain = { module = "io.emeraldpay.etherjar:etherjar-domain", version.ref = "etherjar" }
+etherjar-hex = { module = "io.emeraldpay.etherjar:etherjar-hex", version.ref = "etherjar" }
+etherjar-rpc-api = { module = "io.emeraldpay.etherjar:etherjar-rpc-api", version.ref = "etherjar" }
+etherjar-rpc-http = { module = "io.emeraldpay.etherjar:etherjar-rpc-http", version.ref = "etherjar" }
+etherjar-rpc-ws = { module = "io.emeraldpay.etherjar:etherjar-rpc-ws", version.ref = "etherjar" }
+etherjar-tx = { module = "io.emeraldpay.etherjar:etherjar-tx", version.ref = "etherjar" }
+etherjar-contract = { module = "io.emeraldpay.etherjar:etherjar-contract", version.ref = "etherjar" }
+etherjar-erc20 = { module = "io.emeraldpay.etherjar:etherjar-erc20", version.ref = "etherjar" }
+
+groovy = { module = "org.codehaus.groovy:groovy", version.ref = "groovy" }
+
+grpc-protobuf = { module = "io.grpc:grpc-protobuf", version.ref = "grpc" }
+grpc-stub = { module = "io.grpc:grpc-stub", version.ref = "grpc" }
+grpc-netty = { module = "io.grpc:grpc-netty", version.ref = "grpc" }
+grpc-testing = { module = "io.grpc:grpc-testing", version.ref = "grpc" }
+
+httpcomponents-httpmime = { module = "org.apache.httpcomponents:httpmime", version.ref = "httpcomponents" }
+httpcomponents-httpclient = { module = "org.apache.httpcomponents:httpclient", version.ref = "httpcomponents" }
+
+jackson-core = { module = "com.fasterxml.jackson.core:jackson-core", version.ref = "jackson" }
+jackson-databind = { module = "com.fasterxml.jackson.core:jackson-databind", version.ref = "jackson" }
+jackson-datatype-jdk8 = { module = "com.fasterxml.jackson.datatype:jackson-datatype-jdk8", version.ref = "jackson" }
+jackson-datatype-jsr310 = { module = "com.fasterxml.jackson.datatype:jackson-datatype-jsr310", version.ref = "jackson" }
+jackson-module-kotlin = { module = "com.fasterxml.jackson.module:jackson-module-kotlin", version.ref = "jackson" }
+
+java-websocket = "org.java-websocket:Java-WebSocket:1.5.1"
+
+javax-annotations = "javax.annotation:javax.annotation-api:1.3.2"
+
+kotlin-stdlib-jdk8 = { module = "org.jetbrains.kotlin:kotlin-stdlib-jdk8", version.ref = "kotlin" }
+kotlin-reflect = { module = "org.jetbrains.kotlin:kotlin-reflect", version.ref = "kotlin" }
+
+lettuce-core = "io.lettuce:lettuce-core:5.2.2.RELEASE"
+
+micrometer-registry-prometheus = "io.micrometer:micrometer-registry-prometheus:1.5.6"
+
+mockserver-netty = "org.mock-server:mockserver-netty:5.11.2"
+
+netty-common = { module = "io.netty:netty-common", version.ref = "netty" }
+netty-transport = { module = "io.netty:netty-transport", version.ref = "netty" }
+netty-handler-core = { module = "io.netty:netty-handler", version.ref = "netty" }
+netty-handler-proxy = { module = "io.netty:netty-handler-proxy", version.ref = "netty" }
+netty-resolver-core = { module = "io.netty:netty-resolver", version.ref = "netty" }
+netty-resolver-dns = { module = "io.netty:netty-resolver-dns", version.ref = "netty" }
+netty-codec-core = { module = "io.netty:netty-codec", version.ref = "netty" }
+netty-codec-http = { module = "io.netty:netty-codec-http", version.ref = "netty" }
+netty-codec-http2 = { module = "io.netty:netty-codec-http2", version.ref = "netty" }
+netty-buffer = { module = "io.netty:netty-buffer", version.ref = "netty" }
+netty-tcnative-core = { module = "io.netty:netty-tcnative", version.ref = "netty-tcnative" }
+netty-tcnative-boringssl = { module = "io.netty:netty-tcnative-boringssl-static", version.ref = "netty-tcnative" }
+
+objgenesis = "org.objenesis:objenesis:3.1"
+
+reactor-core = { module = "io.projectreactor:reactor-core", version.ref = "reactor" }
+reactor-netty = { module = "io.projectreactor.netty:reactor-netty", version = "1.0.11" }
+reactor-extra = { module = "io.projectreactor.addons:reactor-extra", version = "3.4.5" }
+reactor-kotlin = { module = "io.projectreactor.kotlin:reactor-kotlin-extensions", version = "1.1.4" }
+reactor-test = { module = "io.projectreactor:reactor-test", version.ref = "reactor" }
+
+reactor-grpc-stub = "com.salesforce.servicelibs:reactor-grpc-stub:1.2.0"
+
+slf4j-api = { module = "org.slf4j:slf4j-api", version.ref = "slf4j" }
+slf4j-jul = { module = "org.slf4j:jul-to-slf4j", version.ref = "slf4j" }
+slf4j-jcl = { module = "org.slf4j:jcl-over-slf4j", version.ref = "slf4j" }
+log4j-slf4j = "org.apache.logging.log4j:log4j-slf4j-impl:2.11.1"
+
+snake-yaml = "org.yaml:snakeyaml:1.24"
+
+spockframework-core = "org.spockframework:spock-core:2.0-groovy-3.0"
+
+spring-boot-starter = { module = "org.springframework.boot:spring-boot-starter", version.ref = "spring-boot" }
+spring-security-core = { module = "org.springframework.security:spring-security-core", version.ref = "spring-security" }
+spring-security-web = { module = "org.springframework.security:spring-security-web", version.ref = "spring-security" }
+spring-security-config = { module = "org.springframework.security:spring-security-config", version.ref = "spring-security" }
+
+[bundles]
+apache-commons = ["commons-io", "apache-commons-lang3", "apache-commons-collections4"]
+etherjar = ["etherjar-domain", "etherjar-hex", "etherjar-rpc-api", "etherjar-rpc-http", "etherjar-rpc-ws", "etherjar-tx", "etherjar-contract", "etherjar-erc20"]
+grpc = ["grpc-protobuf", "grpc-stub", "grpc-netty"]
+httpcomponents = ["httpcomponents-httpmime", "httpcomponents-httpclient"]
+jackson = ["jackson-core", "jackson-databind", "jackson-datatype-jdk8", "jackson-datatype-jsr310", "jackson-module-kotlin"]
+kotlin = ["kotlin-stdlib-jdk8", "kotlin-reflect"]
+netty = ["netty-common", "netty-transport", "netty-handler-core", "netty-handler-proxy", "netty-resolver-core", "netty-resolver-dns", "netty-codec-core", "netty-codec-http", "netty-codec-http2", "netty-buffer", "netty-tcnative-core", "netty-tcnative-boringssl"]
+reactor = ["reactor-core", "reactor-netty", "reactor-extra", "reactor-kotlin"]
+slf4j = ["slf4j-api", "slf4j-jul", "slf4j-jcl", "log4j-slf4j"]
+spring-framework = ["spring-boot-starter", "spring-security-core", "spring-security-web", "spring-security-config"]
+
+[plugins]
+kotlin = { id = "org.jetbrains.kotlin.jvm", version.ref = "kotlin" }
+jib = { id = "com.google.cloud.tools.jib", version = "2.5.0" }
+spring = { id = "org.springframework.boot", version = "2.3.5.RELEASE" }
+git = { id = "com.palantir.git-version", version = "0.12.3" }
+protobuf = { id = "com.google.protobuf", version = "0.8.17" }
+ktlint = { id = "org.jlleitschuh.gradle.ktlint", version = "10.2.0" }
+detekt = { id = "io.gitlab.arturbosch.detekt", version.ref = "detekt" }
\ No newline at end of file
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index bb8b2fc2..ffed3a25 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -1,5 +1,5 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-6.5.1-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-7.2-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
diff --git a/gradlew.bat b/gradlew.bat
index 5093609d..a9f778a7 100644
--- a/gradlew.bat
+++ b/gradlew.bat
@@ -1,104 +1,104 @@
-@rem
-@rem Copyright 2015 the original author or authors.
-@rem
-@rem Licensed under the Apache License, Version 2.0 (the "License");
-@rem you may not use this file except in compliance with the License.
-@rem You may obtain a copy of the License at
-@rem
-@rem      https://www.apache.org/licenses/LICENSE-2.0
-@rem
-@rem Unless required by applicable law or agreed to in writing, software
-@rem distributed under the License is distributed on an "AS IS" BASIS,
-@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-@rem See the License for the specific language governing permissions and
-@rem limitations under the License.
-@rem
-
-@if "%DEBUG%" == "" @echo off
-@rem ##########################################################################
-@rem
-@rem  Gradle startup script for Windows
-@rem
-@rem ##########################################################################
-
-@rem Set local scope for the variables with windows NT shell
-if "%OS%"=="Windows_NT" setlocal
-
-set DIRNAME=%~dp0
-if "%DIRNAME%" == "" set DIRNAME=.
-set APP_BASE_NAME=%~n0
-set APP_HOME=%DIRNAME%
-
-@rem Resolve any "." and ".." in APP_HOME to make it shorter.
-for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
-
-@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
-set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
-
-@rem Find java.exe
-if defined JAVA_HOME goto findJavaFromJavaHome
-
-set JAVA_EXE=java.exe
-%JAVA_EXE% -version >NUL 2>&1
-if "%ERRORLEVEL%" == "0" goto init
-
-echo.
-echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
-echo.
-echo Please set the JAVA_HOME variable in your environment to match the
-echo location of your Java installation.
-
-goto fail
-
-:findJavaFromJavaHome
-set JAVA_HOME=%JAVA_HOME:"=%
-set JAVA_EXE=%JAVA_HOME%/bin/java.exe
-
-if exist "%JAVA_EXE%" goto init
-
-echo.
-echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
-echo.
-echo Please set the JAVA_HOME variable in your environment to match the
-echo location of your Java installation.
-
-goto fail
-
-:init
-@rem Get command-line arguments, handling Windows variants
-
-if not "%OS%" == "Windows_NT" goto win9xME_args
-
-:win9xME_args
-@rem Slurp the command line arguments.
-set CMD_LINE_ARGS=
-set _SKIP=2
-
-:win9xME_args_slurp
-if "x%~1" == "x" goto execute
-
-set CMD_LINE_ARGS=%*
-
-:execute
-@rem Setup the command line
-
-set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
-
-
-@rem Execute Gradle
-"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %CMD_LINE_ARGS%
-
-:end
-@rem End local scope for the variables with windows NT shell
-if "%ERRORLEVEL%"=="0" goto mainEnd
-
-:fail
-rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
-rem the _cmd.exe /c_ return code!
-if  not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
-exit /b 1
-
-:mainEnd
-if "%OS%"=="Windows_NT" endlocal
-
-:omega
+@rem
+@rem Copyright 2015 the original author or authors.
+@rem
+@rem Licensed under the Apache License, Version 2.0 (the "License");
+@rem you may not use this file except in compliance with the License.
+@rem You may obtain a copy of the License at
+@rem
+@rem      https://www.apache.org/licenses/LICENSE-2.0
+@rem
+@rem Unless required by applicable law or agreed to in writing, software
+@rem distributed under the License is distributed on an "AS IS" BASIS,
+@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+@rem See the License for the specific language governing permissions and
+@rem limitations under the License.
+@rem
+
+@if "%DEBUG%" == "" @echo off
+@rem ##########################################################################
+@rem
+@rem  Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+set DIRNAME=%~dp0
+if "%DIRNAME%" == "" set DIRNAME=.
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Resolve any "." and ".." in APP_HOME to make it shorter.
+for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if "%ERRORLEVEL%" == "0" goto init
+
+echo.
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto init
+
+echo.
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:init
+@rem Get command-line arguments, handling Windows variants
+
+if not "%OS%" == "Windows_NT" goto win9xME_args
+
+:win9xME_args
+@rem Slurp the command line arguments.
+set CMD_LINE_ARGS=
+set _SKIP=2
+
+:win9xME_args_slurp
+if "x%~1" == "x" goto execute
+
+set CMD_LINE_ARGS=%*
+
+:execute
+@rem Setup the command line
+
+set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
+
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %CMD_LINE_ARGS%
+
+:end
+@rem End local scope for the variables with windows NT shell
+if "%ERRORLEVEL%"=="0" goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+if  not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
+exit /b 1
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega
diff --git a/nix/default.nix b/nix/default.nix
new file mode 100644
index 00000000..a1941c4e
--- /dev/null
+++ b/nix/default.nix
@@ -0,0 +1,45 @@
+{ system ? builtins.currentSystem
+, nixpkgs ? import ./nixpkgs.nix { inherit system; }
+}:
+let
+  mkEnv = nixpkgs.callPackage ./mkEnv.nix { };
+in
+rec {
+  inherit
+    nixpkgs
+    ;
+
+  protoc-gen-grpc-java = nixpkgs.callPackage ./pkgs/protoc-gen-grpc-java { };
+
+  env = mkEnv {
+    env = {
+      # Configure nix to use nixpgks
+      NIX_PATH = "nixpkgs=${toString nixpkgs.path}";
+      # Set the env for gradle
+      JAVA_HOME = "@env-root@/lib/openjdk";
+    };
+
+    paths = [
+      # Development tools
+      nixpkgs.gitAndTools.git-absorb
+      nixpkgs.jq
+      nixpkgs.niv
+      nixpkgs.websocat
+      nixpkgs.yq
+
+      # Protobuf stuff
+      nixpkgs.protobuf3_9
+      protoc-gen-grpc-java
+
+      # Code formatting
+      nixpkgs.treefmt
+      nixpkgs.nixpkgs-fmt
+      nixpkgs.shfmt
+
+      nixpkgs.jdk
+      nixpkgs.coreutils
+      nixpkgs.gnugrep
+      nixpkgs.which
+    ];
+  };
+}
diff --git a/nix/lib/force_cached.nix b/nix/lib/force_cached.nix
new file mode 100644
index 00000000..0e416d51
--- /dev/null
+++ b/nix/lib/force_cached.nix
@@ -0,0 +1,38 @@
+# Source https://github.com/Mic92/nix-build-uncached/blob/master/scripts/force_cached.nix
+coreutils: attrs:
+with builtins;
+let
+  # Copied from <nixpkgs/lib>
+  isDerivation = x: isAttrs x && x ? type && x.type == "derivation";
+
+  # Return true if `nix-build` would traverse that attribute set to look for
+  # more derivations to build.
+  hasRecurseIntoAttrs = x: isAttrs x && (x.recurseForDerivations or false);
+
+  # Wraps derivations that disallow substitutes so that they can be cached.
+  toCachedDrv = drv:
+    if !(drv.allowSubstitutes or true) then
+      derivation
+        {
+          name = "${drv.name}-to-cached";
+          system = drv.system;
+          builder = "/bin/sh";
+          args = [ "-c" "${coreutils}/bin/ln -s ${drv} $out; exit 0" ];
+        }
+    else
+      drv;
+
+  op = _: val:
+    if isDerivation val then
+      toCachedDrv val
+    else if hasRecurseIntoAttrs val then
+      forceCached val
+    else
+      val
+  ;
+
+  # Traverses a tree of derivation and wrap all of those that disallow
+  # substitutes.
+  forceCached = attrs: mapAttrs op attrs;
+in
+forceCached attrs
diff --git a/nix/mkEnv.nix b/nix/mkEnv.nix
new file mode 100644
index 00000000..12364a51
--- /dev/null
+++ b/nix/mkEnv.nix
@@ -0,0 +1,29 @@
+{ lib, writeText, buildEnv }:
+
+{ name ? "dev-env"
+, # Environment variables to set
+  env ? { }
+, # Packages to add to the path
+  paths ? [ ]
+}:
+let
+  envToBash = name: value:
+    "export ${name}=${lib.escapeShellArg (toString value)}"
+  ;
+
+  exports = lib.concatStringsSep "\n"
+    (map (name: envToBash name env.${name}) (lib.attrNames env));
+
+  env-root = writeText "env-root" ''
+    export PATH=@env-root@/bin:$PATH
+
+    ${exports}
+  '';
+in
+buildEnv {
+  inherit name;
+  paths = paths;
+  postBuild = ''
+    sed "s|@env-root@|$out|g" ${env-root} > $out/.profile
+  '';
+}
diff --git a/nix/nixpkgs.nix b/nix/nixpkgs.nix
new file mode 100644
index 00000000..6c0edfe8
--- /dev/null
+++ b/nix/nixpkgs.nix
@@ -0,0 +1,9 @@
+{ system ? builtins.currentSystem }:
+let
+  sources = import ./sources.nix;
+in
+import sources.nixpkgs {
+  inherit system;
+  config = { };
+  overlays = [ ];
+}
diff --git a/nix/pkgs/protoc-gen-grpc-java/default.nix b/nix/pkgs/protoc-gen-grpc-java/default.nix
new file mode 100644
index 00000000..e0651159
--- /dev/null
+++ b/nix/pkgs/protoc-gen-grpc-java/default.nix
@@ -0,0 +1,23 @@
+{ stdenv, runCommand, fetchurl, autoPatchelfHook, lib }:
+
+stdenv.mkDerivation rec {
+  pname = "protoc-gen-grpc-java";
+  version = "1.38.0";
+
+  src = fetchurl {
+    url = "https://repo1.maven.org/maven2/io/grpc/protoc-gen-grpc-java/${version}/protoc-gen-grpc-java-${version}-linux-x86_64.exe";
+    sha256 = "sha256:1gy5lkxj6d4vrgalwnjp15biybcnrmp695si9878y7high39ymr3";
+  };
+
+  nativeBuildInputs = [ autoPatchelfHook ];
+
+  unpackPhase = ''
+    cp $src ./bin
+    chmod +x ./bin
+  '';
+
+  installPhase = ''
+    mkdir -p $out/bin
+    mv ./bin $out/bin/$pname
+  '';
+}
diff --git a/nix/release.nix b/nix/release.nix
new file mode 100644
index 00000000..863f0c9c
--- /dev/null
+++ b/nix/release.nix
@@ -0,0 +1,16 @@
+# Use this file with nix-build-uncached on CI
+{ system ? builtins.currentSystem }:
+let
+  nixpkgs = import ./nixpkgs.nix { inherit system; };
+
+  # This is used to wrap all of our outputs, so they all end-up in the cache.
+  #
+  # There are two attributes ` allowSubstitutes = false;` and
+  # `preferLocalBuild = true;` that influence how derivations gets pulled and
+  # pushed.
+  forceCached = import ./lib/force_cached.nix nixpkgs.coreutils;
+
+  # All the packages that we care about
+  ourPackages = import ./. { inherit nixpkgs system; };
+in
+forceCached ourPackages
diff --git a/nix/sources.json b/nix/sources.json
new file mode 100644
index 00000000..c1ec96f7
--- /dev/null
+++ b/nix/sources.json
@@ -0,0 +1,14 @@
+{
+    "nixpkgs": {
+        "branch": "nixos-unstable",
+        "description": "Nix Packages collection",
+        "homepage": "",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "e4ef597edfd8a0ba5f12362932fc9b1dd01a0aef",
+        "sha256": "1w6y7ma2crcsfph60z8j1k3af0v2m110cbjrb62z287mn4skhqjs",
+        "type": "tarball",
+        "url": "https://github.com/NixOS/nixpkgs/archive/e4ef597edfd8a0ba5f12362932fc9b1dd01a0aef.tar.gz",
+        "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
+    }
+}
diff --git a/nix/sources.nix b/nix/sources.nix
new file mode 100644
index 00000000..1fc17a6c
--- /dev/null
+++ b/nix/sources.nix
@@ -0,0 +1,160 @@
+# This file has been generated by Niv.
+let
+  #
+  # The fetchers. fetch_<type> fetches specs of type <type>.
+  #
+
+  fetch_file = pkgs: name: spec:
+    let
+      name' = sanitizeName name + "-src";
+    in
+    if spec.builtin or true then
+      builtins_fetchurl { inherit (spec) url sha256; name = name'; }
+    else
+      pkgs.fetchurl { inherit (spec) url sha256; name = name'; };
+
+  fetch_tarball = pkgs: name: spec:
+    let
+      name' = sanitizeName name + "-src";
+    in
+    if spec.builtin or true then
+      builtins_fetchTarball { name = name'; inherit (spec) url sha256; }
+    else
+      pkgs.fetchzip { name = name'; inherit (spec) url sha256; };
+
+  fetch_git = name: spec:
+    let
+      ref =
+        if spec ? ref then spec.ref else
+        if spec ? branch then "refs/heads/${spec.branch}" else
+        if spec ? tag then "refs/tags/${spec.tag}" else
+        abort "In git source '${name}': Please specify `ref`, `tag` or `branch`!";
+    in
+    builtins.fetchGit { url = spec.repo; inherit (spec) rev; inherit ref; };
+
+  fetch_local = spec: spec.path;
+
+  fetch_builtin-tarball = name: throw
+    ''[${name}] The niv type "builtin-tarball" is deprecated. You should instead use `builtin = true`.
+        $ niv modify ${name} -a type=tarball -a builtin=true'';
+
+  fetch_builtin-url = name: throw
+    ''[${name}] The niv type "builtin-url" will soon be deprecated. You should instead use `builtin = true`.
+        $ niv modify ${name} -a type=file -a builtin=true'';
+
+  #
+  # Various helpers
+  #
+
+  # https://github.com/NixOS/nixpkgs/pull/83241/files#diff-c6f540a4f3bfa4b0e8b6bafd4cd54e8bR695
+  sanitizeName = name:
+    (
+      concatMapStrings (s: if builtins.isList s then "-" else s)
+        (
+          builtins.split "[^[:alnum:]+._?=-]+"
+            ((x: builtins.elemAt (builtins.match "\\.*(.*)" x) 0) name)
+        )
+    );
+
+  # The actual fetching function.
+  fetch = pkgs: name: spec:
+
+    if ! builtins.hasAttr "type" spec then
+      abort "ERROR: niv spec ${name} does not have a 'type' attribute"
+    else if spec.type == "file" then fetch_file pkgs name spec
+    else if spec.type == "tarball" then fetch_tarball pkgs name spec
+    else if spec.type == "git" then fetch_git name spec
+    else if spec.type == "local" then fetch_local spec
+    else if spec.type == "builtin-tarball" then fetch_builtin-tarball name
+    else if spec.type == "builtin-url" then fetch_builtin-url name
+    else
+      abort "ERROR: niv spec ${name} has unknown type ${builtins.toJSON spec.type}";
+
+  # If the environment variable NIV_OVERRIDE_${name} is set, then use
+  # the path directly as opposed to the fetched source.
+  replace = name: drv:
+    let
+      saneName = stringAsChars (c: if isNull (builtins.match "[a-zA-Z0-9]" c) then "_" else c) name;
+      ersatz = builtins.getEnv "NIV_OVERRIDE_${saneName}";
+    in
+    if ersatz == "" then drv else
+      # this turns the string into an actual Nix path (for both absolute and
+      # relative paths)
+    if builtins.substring 0 1 ersatz == "/" then /. + ersatz else /. + builtins.getEnv "PWD" + "/${ersatz}";
+
+  # Ports of functions for older nix versions
+
+  # a Nix version of mapAttrs if the built-in doesn't exist
+  mapAttrs = builtins.mapAttrs or (
+    f: set: with builtins;
+    listToAttrs (map (attr: { name = attr; value = f attr set.${attr}; }) (attrNames set))
+  );
+
+  # https://github.com/NixOS/nixpkgs/blob/0258808f5744ca980b9a1f24fe0b1e6f0fecee9c/lib/lists.nix#L295
+  range = first: last: if first > last then [ ] else builtins.genList (n: first + n) (last - first + 1);
+
+  # https://github.com/NixOS/nixpkgs/blob/0258808f5744ca980b9a1f24fe0b1e6f0fecee9c/lib/strings.nix#L257
+  stringToCharacters = s: map (p: builtins.substring p 1 s) (range 0 (builtins.stringLength s - 1));
+
+  # https://github.com/NixOS/nixpkgs/blob/0258808f5744ca980b9a1f24fe0b1e6f0fecee9c/lib/strings.nix#L269
+  stringAsChars = f: s: concatStrings (map f (stringToCharacters s));
+  concatMapStrings = f: list: concatStrings (map f list);
+  concatStrings = builtins.concatStringsSep "";
+
+  # https://github.com/NixOS/nixpkgs/blob/8a9f58a375c401b96da862d969f66429def1d118/lib/attrsets.nix#L331
+  optionalAttrs = cond: as: if cond then as else { };
+
+  # fetchTarball version that is compatible between all the versions of Nix
+  builtins_fetchTarball = { url, name ? null, sha256 }@attrs:
+    let
+      inherit (builtins) lessThan nixVersion fetchTarball;
+    in
+    if lessThan nixVersion "1.12" then
+      fetchTarball ({ inherit url; } // (optionalAttrs (!isNull name) { inherit name; }))
+    else
+      fetchTarball attrs;
+
+  # fetchurl version that is compatible between all the versions of Nix
+  builtins_fetchurl = { url, name ? null, sha256 }@attrs:
+    let
+      inherit (builtins) lessThan nixVersion fetchurl;
+    in
+    if lessThan nixVersion "1.12" then
+      fetchurl ({ inherit url; } // (optionalAttrs (!isNull name) { inherit name; }))
+    else
+      fetchurl attrs;
+
+  # Create the final "sources" from the config
+  mkSources = config:
+    mapAttrs
+      (
+        name: spec:
+          if builtins.hasAttr "outPath" spec
+          then
+            abort
+              "The values in sources.json should not have an 'outPath' attribute"
+          else
+            spec // { outPath = replace name (fetch config.pkgs name spec); }
+      )
+      config.sources;
+
+  # The "config" used by the fetchers
+  mkConfig =
+    { sourcesFile ? if builtins.pathExists ./sources.json then ./sources.json else null
+    , sources ? if isNull sourcesFile then { } else builtins.fromJSON (builtins.readFile sourcesFile)
+    , system ? builtins.currentSystem
+    , pkgs ? abort ''
+        Some source is being used outside of nixpkgs. For example using import.
+
+        Edit the sources.json and add `"builtin": true` to that source.
+      ''
+    }: rec {
+      # The sources, i.e. the attribute set of spec name to spec
+      inherit sources;
+
+      # The "pkgs" (evaluated nixpkgs) to use for e.g. non-builtin fetchers
+      inherit pkgs;
+    };
+
+in
+mkSources (mkConfig { }) // { __functor = _: settings: mkSources (mkConfig settings); }
diff --git a/settings.gradle b/settings.gradle
new file mode 100644
index 00000000..0778dbab
--- /dev/null
+++ b/settings.gradle
@@ -0,0 +1,2 @@
+enableFeaturePreview("VERSION_CATALOGS")
+enableFeaturePreview("TYPESAFE_PROJECT_ACCESSORS")