the library is compiled in esm format (#109)

package.json

@@ -4,20 +4,24 @@
     "description": "1inch Fusion SDK",
     "author": "@1inch",
     "private": false,
-    "main": "dist/index.js",
-    "types": "dist/index.d.ts",
     "files": [
         "dist",
         "LICENSE",
         "README.md",
         "package.json"
     ],
+    "module": "dist/esm/index.js",
+    "main": "dist/cjs/index.js",
+    "types": "dist/types/src/index.d.ts",
     "repository": {
         "type": "git",
         "url": "ssh://[email protected]:1inch/fusion-sdk.git"
     },
     "scripts": {
-        "build": "tsc",
+        "build": "npm run build:esm && npm run build:cjs && npm run build:types",
+        "build:esm": "tsc --project tsconfig.esm.json",
+        "build:cjs": "tsc --project tsconfig.cjs.json",
+        "build:types": "tsc --project tsconfig.types.json",
         "format": "prettier --write \"src/**/*.ts\" \"test/**/*.ts\"",
         "lint:ci": "eslint \"{src,apps,libs,test}/**/*.ts\"",
         "lint": "eslint  \"{src,apps,libs,test}/**/*.ts\" --ignore-path .eslintignore --fix",
@@ -59,6 +63,7 @@
         "ts-loader": "^9.5.1",
         "ts-mockito": "^2.6.1",
         "ts-node": "^10.9.2",
+        "tslib": "2.6.3",
         "typescript": "4.9.4"
     },
     "peerDependencies": {

tsconfig.cjs.json

@@ -0,0 +1,17 @@
+{
+    "extends": "./tsconfig.json",
+    "compilerOptions": {
+        "outDir": "./dist/cjs",
+        "module": "CommonJS",
+        "declaration": false,
+        "composite": false,
+        "resolveJsonModule": true,
+        "importHelpers": true,
+    },
+    "exclude": [
+        "node_modules",
+        "test",
+        "dist",
+        "**/*spec.ts"
+    ]
+}

tsconfig.esm.json

@@ -0,0 +1,17 @@
+{
+    "extends": "./tsconfig.json",
+    "compilerOptions": {
+        "outDir": "./dist/esm",
+        "module": "ESNext",
+        "declaration": false,
+        "composite": false,
+        "resolveJsonModule": true,
+        "importHelpers": true
+    },
+    "exclude": [
+        "node_modules",
+        "test",
+        "dist",
+        "**/*spec.ts"
+    ]
+}

tsconfig.json

@@ -1,12 +1,16 @@
 {
     "extends": "@1inch/tsconfig",
     "compilerOptions": {
-        "moduleResolution": "NodeNext",
-        "outDir": "./dist",
-        "rootDir": "./src",
-        "lib": ["ES2021"],
         "target": "ES2021",
-        "removeComments": false
+        "lib": ["ES2021"],
+        "module": "ESNext",
+        "moduleResolution": "Node",
+        "strict": true,
+        "esModuleInterop": true,
+        "skipLibCheck": true,
+        "forceConsistentCasingInFileNames": true,
+        "resolveJsonModule": true,
+        "baseUrl": "./src"
     },
-    "include": ["./src"]
+    "include": ["./src/**/*.ts", "./src/**/*.json"]
 }

tsconfig.types.json

@@ -0,0 +1,15 @@
+{
+    "extends": "./tsconfig.json",
+    "compilerOptions": {
+        "outDir": "./dist/types",
+        "declaration": true,
+        "emitDeclarationOnly": true,
+        "composite": true
+    },
+    "exclude": [
+        "node_modules",
+        "test",
+        "dist",
+        "**/*spec.ts"
+    ]
+}