feat: implement saving ENR/s to file and loading ENR/s from file

.github/workflows/ci.yml

@@ -0,0 +1,32 @@
+name: Enr CI
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+  workflow_dispatch:
+
+env:
+  ZIG_VERSION: 0.14.1
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v4  
+
+      - name: Set up Zig
+        uses: korandoru/setup-zig@v1
+        with:
+          zig-version: 0.14.1
+
+      - name: Formatting
+        run: zig fmt --check --color on .
+
+      - name: Unit testing
+        run: zig build test --summary all
+
+      - name: Building
+        run: zig build -Doptimize=ReleaseSafe

README.md

@@ -1,2 +1,49 @@
 # enr
-About Ethereum Node Records (ENR)
+Ethereum Node Records (ENR) utility in Zig.
+
+## Prerequisites
+
+- Zig 0.14.1
+
+## Building
+
+To build the project, run the following command in the root directory of the project:
+
+```bash
+zig build -Doptimize=ReleaseSafe
+```
+
+## Running Tests
+
+To run the tests, run the following command in the root directory of the project:
+
+```bash
+zig build test --summary all
+```
+
+## Docs
+
+To generate documentation for the project, run the following command in the root directory of the project:
+
+```bash
+zig build docs
+```
+
+# Usage
+
+Update `build.zig.zon`:
+
+```sh
+zig fetch --save git+https://github.com/blockblaz/enr
+```
+
+In your `build.zig`:
+
+```zig
+const enr_dep = b.dependency("zig_enr", .{
+    .target = target,
+    .optimize = optimize,
+});
+const enr_module = enr_dep.module("zig-enr");
+root_module.addImport("zig-enr", enr_module);
+```

build.zig

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+const std = @import("std");
+
+pub fn build(b: *std.Build) !void {
+    const target = b.standardTargetOptions(.{});
+
+    const optimize = b.standardOptimizeOption(.{});
+
+    const discv5 = b.dependency("discv5", .{});
+
+    const enr_mod = discv5.module("enr");
+
+    const lib_mod = b.createModule(.{
+        .root_source_file = b.path("src/root.zig"),
+        .target = target,
+        .optimize = optimize,
+    });
+
+    lib_mod.addImport("enr", enr_mod);
+
+    try b.modules.put(b.dupe("zig-enr"), lib_mod);
+    const lib = b.addLibrary(.{
+        .linkage = .static,
+        .name = "enr",
+        .root_module = lib_mod,
+    });
+
+    b.installArtifact(lib);
+
+    const lib_unit_tests = b.addTest(.{
+        .root_module = lib_mod,
+    });
+
+    const run_lib_unit_tests = b.addRunArtifact(lib_unit_tests);
+
+    const test_step = b.step("test", "Run unit tests");
+    test_step.dependOn(&run_lib_unit_tests.step);
+
+    const install_docs = b.addInstallDirectory(.{
+        .source_dir = lib.getEmittedDocs(),
+        .install_dir = .prefix,
+        .install_subdir = "docs",
+    });
+    const docs_step = b.step("docs", "Generate documentation");
+    docs_step.dependOn(&install_docs.step);
+}

build.zig.zon

@@ -0,0 +1,23 @@
+.{
+    .name = .zig_enr,
+
+    .version = "0.0.0",
+
+    .fingerprint = 0x499ae5d25c594f6a,
+
+    .minimum_zig_version = "0.14.1",
+
+    .dependencies = .{
+        .discv5 = .{
+            .url = "git+https://github.com/blockblaz/zig-discv5#31f46b3b5e5b25a68638bb320545b74c642c6caa",
+            .hash = "discv5-0.1.0-fkJduLBkAQBQHUJxdOEqCR2YMKfF1lNhaLM_FgonkFRW",
+        },
+    },
+    .paths = .{
+        "build.zig",
+        "build.zig.zon",
+        "src",
+        "LICENSE",
+        "README.md",
+    },
+}