diff --git a/src/ast-builder/builder.ts b/src/ast-builder/builder.ts
new file mode 100644
index 00000000..52ab7aa7
--- /dev/null
+++ b/src/ast-builder/builder.ts
@@ -0,0 +1,86 @@
+import fs from 'fs';
+import { SolcInput, SolcOutput } from 'solidity-ast/solc';
+import { Sources } from './types';
+import { getContractName, getAstsFromSources } from './getters';
+import {
+  replaceSrc,
+  sortASTByDependency,
+  updateDependices,
+} from './ast-updater';
+import { Config } from '../config';
+import { Build } from '../site';
+import path from 'path';
+
+import { compileAst } from './compile-ast';
+
+const createRawOutput = (sources: Sources) => {
+  const output: SolcOutput = { sources: {} };
+  let id = 0;
+  for (const key of Object.keys(sources)) {
+    const source = sources[key]!;
+    replaceSrc(source, id);
+    output.sources[key] = { ast: source, id: id++ };
+  }
+  return output;
+};
+
+const createInput = (solcOutput: SolcOutput) => {
+  const sources = solcOutput.sources;
+  const SolcInput: SolcInput = { sources: {} };
+  for (const key of Object.keys(sources)) {
+    const fileContent = fs.readFileSync(key, 'utf8').toString();
+    SolcInput.sources[key] = { content: fileContent };
+  }
+  return SolcInput;
+};
+
+export function isMainContract(absolutePath: string, astPath: string) {
+  // Extract the contract name from absolute path
+  if (!fileExists(absolutePath) || !fileExists(astPath)) {
+    throw new Error('File does not exist');
+  }
+  const contractName = getContractName(absolutePath);
+
+  // Extract the contract name from ast path
+  const astContractName = getContractName(astPath);
+
+  // Compare contract names
+  return contractName === astContractName;
+}
+
+function fileExists(filePath: string) {
+  try {
+    return fs.statSync(filePath).isFile();
+  } catch (err: any) {
+    if (err.code === 'ENOENT') {
+      return false;
+    } else {
+      throw err;
+    }
+  }
+}
+
+export const makeBuild = async (
+  config: Config,
+  contractList: string[] = [],
+) => {
+  compileAst(config);
+  const { sources: astSources, fullSources } = getAstsFromSources(
+    config.astOutputDir!,
+    config.root!,
+  )!;
+  const solcOutput = createRawOutput(astSources);
+  const sourcesList = Object.values(fullSources).map(source => source.asts);
+
+  const sortedSources = sortASTByDependency(sourcesList, solcOutput);
+  updateDependices(fullSources, sortedSources, config);
+  const ph = path.join(config.root!, config.sourcesDir!, 'sortedSources.json');
+  fs.writeFileSync(ph, JSON.stringify(sortedSources, null, 2));
+  solcOutput.sources = sortedSources;
+  const solcInput = createInput(solcOutput);
+  const build: Build = {
+    input: solcInput,
+    output: solcOutput,
+  };
+  return build;
+};