diff --git a/sdk/oko_cosmos_kit/package.json b/sdk/oko_cosmos_kit/package.json
index 7f4372299..1a06ac442 100644
--- a/sdk/oko_cosmos_kit/package.json
+++ b/sdk/oko_cosmos_kit/package.json
@@ -21,7 +21,7 @@
   ],
   "scripts": {
     "clean": "del-cli dist",
-    "build": "yarn clean && rollup -c --configPlugin typescript && tsc-alias",
+    "build": "tsx ./scripts/build.ts",
     "lint": "eslint --ext .tsx,.ts .",
     "format": "eslint --ext .tsx,.ts --fix ."
   },
@@ -52,6 +52,7 @@
     "del-cli": "^6.0.0",
     "rollup": "^4.0.0",
     "tsc-alias": "^1.8.16",
+    "tsx": "^4.20.3",
     "typescript": "^5.8.3"
   },
   "gitHead": "b1c4753a3a1aa996a2f5c28297d71adbe2457945"
diff --git a/sdk/oko_cosmos_kit/rollup.config.ts b/sdk/oko_cosmos_kit/rollup.config.ts
deleted file mode 100644
index d804b2c68..000000000
--- a/sdk/oko_cosmos_kit/rollup.config.ts
+++ /dev/null
@@ -1,35 +0,0 @@
-import typescript from "@rollup/plugin-typescript";
-import { nodeResolve } from "@rollup/plugin-node-resolve";
-import commonjs from "@rollup/plugin-commonjs";
-import type { RollupOptions } from "rollup";
-
-export const config: RollupOptions[] = [
-  {
-    input: "src/index.ts",
-    output: [
-      {
-        dir: "dist",
-        format: "esm",
-        sourcemap: true,
-      },
-    ],
-    external: [
-      "@cosmos-kit/core",
-      "@keplr-wallet/types",
-      "@oko-wallet/oko-sdk-core",
-      "@oko-wallet/oko-sdk-cosmos",
-      "@cosmjs/amino",
-      "@cosmjs/proto-signing",
-    ],
-    plugins: [
-      nodeResolve(),
-      commonjs(),
-      typescript({
-        tsconfig: "./tsconfig.rollup.json",
-        noEmitOnError: true,
-      }),
-    ],
-  },
-];
-
-export default config;
diff --git a/sdk/oko_cosmos_kit/scripts/build.ts b/sdk/oko_cosmos_kit/scripts/build.ts
new file mode 100644
index 000000000..ec8fd5150
--- /dev/null
+++ b/sdk/oko_cosmos_kit/scripts/build.ts
@@ -0,0 +1,124 @@
+import { deleteAsync } from "del";
+import path from "node:path";
+import typescript from "@rollup/plugin-typescript";
+import { nodeResolve } from "@rollup/plugin-node-resolve";
+import json from "@rollup/plugin-json";
+import chalk from "chalk";
+import {
+  rollup,
+  type InputOptions,
+  type OutputOptions,
+  type RollupBuild,
+} from "rollup";
+import { fileURLToPath } from "node:url";
+import { replaceTscAliasPaths } from "tsc-alias";
+import commonjs from "@rollup/plugin-commonjs";
+
+import tsConfigJson from "../tsconfig.json";
+
+const __filename = fileURLToPath(import.meta.url);
+const __dirname = path.dirname(__filename);
+const PKG_ROOT = path.resolve(__dirname, "..");
+
+async function main() {
+  console.log("Start build");
+
+  await removeDirtyFiles();
+  await bundle();
+  replaceTscAlias();
+
+  console.log("Done build");
+}
+
+async function removeDirtyFiles() {
+  const TS_BUILD_INFO = "*.tsbuildinfo";
+  const DIST = "dist";
+
+  console.log("deleting: %s, %s", TS_BUILD_INFO, DIST);
+
+  await deleteAsync([
+    path.resolve(PKG_ROOT, DIST),
+    path.resolve(PKG_ROOT, TS_BUILD_INFO),
+  ]);
+}
+
+function replaceTscAlias() {
+  replaceTscAliasPaths({ configFile: path.resolve(PKG_ROOT, "tsconfig.json") });
+
+  console.log("Done tsc-alias");
+}
+
+async function bundle() {
+  console.log("Start bundling");
+
+  const srcPath = path.resolve(__dirname, "../src");
+
+  const rollupTSConfig = {
+    ...tsConfigJson,
+  };
+  rollupTSConfig.compilerOptions.rootDir = srcPath;
+  rollupTSConfig.include = [`${srcPath}/**/*`];
+
+  const inputOptions: InputOptions = {
+    input: "src/index.ts",
+    external: [
+      "@cosmos-kit/core",
+      "@keplr-wallet/types",
+      "@oko-wallet/oko-sdk-core",
+      "@oko-wallet/oko-sdk-cosmos",
+      "@cosmjs/amino",
+      "@cosmjs/proto-signing",
+    ],
+    plugins: [
+      json(),
+      nodeResolve(),
+      commonjs(),
+      typescript({
+        ...rollupTSConfig,
+        noEmitOnError: true,
+        outputToFilesystem: true,
+      }),
+    ],
+  };
+
+  const outputOptionsList: OutputOptions[] = [
+    {
+      file: "dist/index.js",
+      format: "esm",
+      sourcemap: true,
+    },
+  ];
+
+  let bundle: RollupBuild;
+  try {
+    console.log(chalk.cyan("input: %s"), chalk.bold(inputOptions.input));
+    bundle = await rollup(inputOptions);
+
+    await generateOutputs(bundle, inputOptions, outputOptionsList);
+  } catch (error) {
+    console.error(error);
+    process.exit(1);
+  }
+
+  if (bundle) {
+    await bundle.close();
+  }
+}
+
+async function generateOutputs(
+  bundle: RollupBuild,
+  inputOptions: InputOptions,
+  outputOptionsList: OutputOptions[],
+) {
+  for (const outputOptions of outputOptionsList) {
+    console.log(
+      chalk.green("generated: %s → %s"),
+      chalk.bold(inputOptions.input),
+      chalk.bold(outputOptions.file),
+    );
+
+    await bundle.write(outputOptions);
+  }
+}
+
+main().then();
diff --git a/sdk/oko_cosmos_kit/tsconfig.rollup.json b/sdk/oko_cosmos_kit/tsconfig.rollup.json
deleted file mode 100644
index 3d658a6f7..000000000
--- a/sdk/oko_cosmos_kit/tsconfig.rollup.json
+++ /dev/null
@@ -1,7 +0,0 @@
-{
-  "extends": "./tsconfig.json",
-  "compilerOptions": {
-    "rootDir": "./src"
-  },
-  "include": ["src/**/*"]
-}
diff --git a/sdk/oko_sdk_cosmos/package.json b/sdk/oko_sdk_cosmos/package.json
index 204c09349..33d3fb728 100644
--- a/sdk/oko_sdk_cosmos/package.json
+++ b/sdk/oko_sdk_cosmos/package.json
@@ -7,7 +7,6 @@
   },
   "scripts": {
     "clean": "del-cli dist",
-    "build_backup": "yarn clean && rollup -c --configPlugin typescript && tsc-alias",
     "build": "tsx ./scripts/build.ts",
     "test": "NODE_OPTIONS=--experimental-vm-modules jest"
   },
diff --git a/sdk/oko_sdk_cosmos/rollup.config.ts b/sdk/oko_sdk_cosmos/rollup.config.ts
deleted file mode 100644
index 5e9172ccf..000000000
--- a/sdk/oko_sdk_cosmos/rollup.config.ts
+++ /dev/null
@@ -1,41 +0,0 @@
-import typescript from "@rollup/plugin-typescript";
-import { nodeResolve } from "@rollup/plugin-node-resolve";
-import commonjs from "@rollup/plugin-commonjs";
-import json from "@rollup/plugin-json";
-import type { RollupOptions } from "rollup";
-
-export const config: RollupOptions[] = [
-  {
-    input: "src/index.ts",
-    output: [
-      {
-        dir: "dist",
-        format: "esm",
-        sourcemap: true,
-      },
-    ],
-    external: [
-      "@oko-wallet/oko-sdk-core",
-      "@cosmjs/amino",
-      "@cosmjs/proto-signing",
-      "@oko-wallet/stdlib-js",
-      "@keplr-wallet/proto-types",
-      "@keplr-wallet/types",
-      "@noble/curves",
-      "@noble/hashes",
-      "bech32",
-      "buffer",
-    ],
-    plugins: [
-      json(),
-      nodeResolve(),
-      commonjs(),
-      typescript({
-        tsconfig: "./tsconfig.rollup.json",
-        noEmitOnError: true,
-      }),
-    ],
-  },
-];
-
-export default config;
diff --git a/sdk/oko_sdk_cosmos/scripts/build.ts b/sdk/oko_sdk_cosmos/scripts/build.ts
index 8205d352d..35d73dee5 100644
--- a/sdk/oko_sdk_cosmos/scripts/build.ts
+++ b/sdk/oko_sdk_cosmos/scripts/build.ts
@@ -53,11 +53,11 @@ async function bundle() {
 
   const srcPath = path.resolve(__dirname, "../src");
 
-  const tsConfig = {
+  const rollupTSConfig = {
     ...tsConfigJson,
   };
-  tsConfig.compilerOptions.rootDir = srcPath;
-  tsConfig.include = [`${srcPath}/**/*`];
+  rollupTSConfig.compilerOptions.rootDir = srcPath;
+  rollupTSConfig.include = [`${srcPath}/**/*`];
 
   const inputOptions: InputOptions = {
     input: "src/index.ts",
@@ -78,7 +78,7 @@ async function bundle() {
       nodeResolve(),
       commonjs(),
       typescript({
-        ...tsConfig,
+        ...rollupTSConfig,
         noEmitOnError: true,
         outputToFilesystem: true,
       }),
diff --git a/sdk/oko_sdk_cosmos/tsconfig.rollup.json b/sdk/oko_sdk_cosmos/tsconfig.rollup.json
deleted file mode 100644
index 3d658a6f7..000000000
--- a/sdk/oko_sdk_cosmos/tsconfig.rollup.json
+++ /dev/null
@@ -1,7 +0,0 @@
-{
-  "extends": "./tsconfig.json",
-  "compilerOptions": {
-    "rootDir": "./src"
-  },
-  "include": ["src/**/*"]
-}
diff --git a/sdk/oko_sdk_eth/package.json b/sdk/oko_sdk_eth/package.json
index 8a692a78e..cec6ab5cd 100644
--- a/sdk/oko_sdk_eth/package.json
+++ b/sdk/oko_sdk_eth/package.json
@@ -33,7 +33,7 @@
   },
   "scripts": {
     "clean": "del-cli dist",
-    "build": "yarn clean && rollup -c --configPlugin typescript && tsc-alias",
+    "build": "tsx ./scripts/build.ts",
     "test": "NODE_OPTIONS=--experimental-vm-modules jest",
     "hardhat": "npx hardhat node",
     "prepublishOnly": "yarn build"
@@ -61,6 +61,7 @@
     "rollup": "^4.0.0",
     "ts-jest": "^29.4.5",
     "tsc-alias": "^1.8.16",
+    "tsx": "^4.20.3",
     "typescript": "^5.8.3"
   },
   "gitHead": "b1c4753a3a1aa996a2f5c28297d71adbe2457945"
diff --git a/sdk/oko_sdk_eth/rollup.config.ts b/sdk/oko_sdk_eth/rollup.config.ts
deleted file mode 100644
index 52afc511b..000000000
--- a/sdk/oko_sdk_eth/rollup.config.ts
+++ /dev/null
@@ -1,43 +0,0 @@
-import typescript from "@rollup/plugin-typescript";
-import { nodeResolve } from "@rollup/plugin-node-resolve";
-import commonjs from "@rollup/plugin-commonjs";
-import json from "@rollup/plugin-json";
-import type { RollupOptions } from "rollup";
-
-const config: RollupOptions[] = [
-  {
-    input: "src/index.ts",
-    output: {
-      dir: "dist",
-      format: "esm",
-      sourcemap: true,
-    },
-    external: [
-      "@oko-wallet/stdlib-js",
-      "@keplr-wallet/types",
-      "@oko-wallet/oko-sdk-core",
-      "eventemitter3",
-      "viem",
-      "uuid",
-      /^viem\//,
-      /^ox\//,
-    ],
-    plugins: [
-      json(),
-      nodeResolve({
-        preferBuiltins: false,
-        browser: true,
-      }),
-      commonjs({
-        include: /node_modules/,
-        transformMixedEsModules: true,
-      }),
-      typescript({
-        tsconfig: "./tsconfig.rollup.json",
-        noEmitOnError: true,
-      }),
-    ],
-  },
-];
-
-export default config;
diff --git a/sdk/oko_sdk_eth/scripts/build.ts b/sdk/oko_sdk_eth/scripts/build.ts
new file mode 100644
index 000000000..426af195b
--- /dev/null
+++ b/sdk/oko_sdk_eth/scripts/build.ts
@@ -0,0 +1,138 @@
+import { deleteAsync } from "del";
+import path from "node:path";
+import commonjs from "@rollup/plugin-commonjs";
+import typescript from "@rollup/plugin-typescript";
+import { nodeResolve } from "@rollup/plugin-node-resolve";
+import json from "@rollup/plugin-json";
+import chalk from "chalk";
+import {
+  rollup,
+  type InputOptions,
+  type OutputOptions,
+  type RollupBuild,
+} from "rollup";
+import { fileURLToPath } from "node:url";
+import { replaceTscAliasPaths } from "tsc-alias";
+
+import tsConfigJson from "../tsconfig.json";
+
+const __filename = fileURLToPath(import.meta.url);
+const __dirname = path.dirname(__filename);
+const PKG_ROOT = path.resolve(__dirname, "..");
+
+async function main() {
+  console.log("Start building");
+
+  await removeDirtyFiles();
+  await bundle();
+  replaceTscAlias();
+
+  console.log("Done");
+}
+
+async function removeDirtyFiles() {
+  const TS_BUILD_INFO = "*.tsbuildinfo";
+  const DIST = "dist";
+
+  console.log("deleting: %s, %s", TS_BUILD_INFO, DIST);
+
+  await deleteAsync([
+    path.resolve(PKG_ROOT, DIST),
+    path.resolve(PKG_ROOT, TS_BUILD_INFO),
+  ]);
+}
+
+function replaceTscAlias() {
+  replaceTscAliasPaths({ configFile: path.resolve(PKG_ROOT, "tsconfig.json") });
+
+  console.log("Done tsc-alias");
+}
+
+async function bundle() {
+  console.log("Start bundling");
+
+  const srcPath = path.resolve(PKG_ROOT, "./src");
+
+  const rollupTSConfig = {
+    ...tsConfigJson,
+  };
+  rollupTSConfig.compilerOptions.rootDir = srcPath;
+  rollupTSConfig.include = [`${srcPath}/**/*`];
+
+  const inputOptions: InputOptions = {
+    input: "src/index.ts",
+    external: [
+      "@oko-wallet/stdlib-js",
+      "@keplr-wallet/types",
+      "@oko-wallet/oko-sdk-core",
+      "eventemitter3",
+      "viem",
+      "uuid",
+      /^viem\//,
+      /^ox\//,
+    ],
+    plugins: [
+      json(),
+      nodeResolve({
+        preferBuiltins: false,
+        browser: true,
+      }),
+      commonjs({
+        include: /node_modules/,
+        transformMixedEsModules: true,
+      }),
+      typescript({
+        ...rollupTSConfig,
+        noEmitOnError: true,
+        outputToFilesystem: true,
+      }),
+    ],
+  };
+
+  const outputOptionsList: OutputOptions[] = [
+    {
+      file: "dist/index.js",
+      format: "esm",
+      sourcemap: true,
+    },
+    // {
+    //   file: "dist/index.min.js",
+    //   format: "esm",
+    //   sourcemap: true,
+    //   plugins: [terser()],
+    // },
+  ];
+
+  let bundle: RollupBuild;
+  try {
+    console.log(chalk.cyan("input: %s"), chalk.bold(inputOptions.input));
+    bundle = await rollup(inputOptions);
+
+    await generateOutputs(bundle, inputOptions, outputOptionsList);
+  } catch (error) {
+    console.error(error);
+    process.exit(1);
+  }
+
+  if (bundle) {
+    await bundle.close();
+  }
+}
+
+async function generateOutputs(
+  bundle: RollupBuild,
+  inputOptions: InputOptions,
+  outputOptionsList: OutputOptions[],
+) {
+  for (const outputOptions of outputOptionsList) {
+    console.log(
+      chalk.green("generated: %s → %s"),
+      chalk.bold(inputOptions.input),
+      chalk.bold(outputOptions.file),
+    );
+
+    await bundle.write(outputOptions);
+  }
+}
+
+main().then();
diff --git a/sdk/oko_sdk_eth/scripts/generate-version.cjs b/sdk/oko_sdk_eth/scripts/generate-version.cjs
deleted file mode 100644
index 5f43be2bb..000000000
--- a/sdk/oko_sdk_eth/scripts/generate-version.cjs
+++ /dev/null
@@ -1,20 +0,0 @@
-#!/usr/bin/env node
-
-const { writeFileSync } = require("fs");
-const { join } = require("path");
-const packageJson = require("../package.json");
-
-function generateVersionFile() {
-  const versionFilePath = join(__dirname, "../src/provider/version.ts");
-  const content = `export const VERSION = ${JSON.stringify(packageJson.version)};\n`;
-
-  writeFileSync(versionFilePath, content, "utf8");
-
-  console.log(`✅ Generated version.ts with VERSION: ${packageJson.version}`);
-}
-
-if (require.main === module) {
-  generateVersionFile();
-}
-
-module.exports = { generateVersionFile };
diff --git a/sdk/oko_sdk_eth/tsconfig.rollup.json b/sdk/oko_sdk_eth/tsconfig.rollup.json
deleted file mode 100644
index fc51b72b3..000000000
--- a/sdk/oko_sdk_eth/tsconfig.rollup.json
+++ /dev/null
@@ -1,8 +0,0 @@
-{
-  "extends": "./tsconfig.json",
-  "compilerOptions": {
-    "rootDir": "./src"
-  },
-  "include": ["src/**/*"],
-  "exclude": ["**/*.test.ts", "**/tests/**/*", "**/*.spec.ts"]
-}
diff --git a/yarn.lock b/yarn.lock
index 7cd9aaf03..83895a007 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -10821,6 +10821,7 @@ __metadata:
     del-cli: "npm:^6.0.0"
     rollup: "npm:^4.0.0"
     tsc-alias: "npm:^1.8.16"
+    tsx: "npm:^4.20.3"
     typescript: "npm:^5.8.3"
   peerDependencies:
     "@cosmjs/amino": ">= 0.28"
@@ -11013,6 +11014,7 @@ __metadata:
     rollup: "npm:^4.0.0"
     ts-jest: "npm:^29.4.5"
     tsc-alias: "npm:^1.8.16"
+    tsx: "npm:^4.20.3"
     typescript: "npm:^5.8.3"
     uuid: "npm:^13.0.0"
     viem: "npm:^2.41.2"