support big data

README.md

@@ -140,6 +140,26 @@ const cost = await flatDirectory.estimateCost(key, data);
 console.log(`Gas Cost: ${cost.gasCost}, Storage Cost: ${cost.storageCost}`);
 ```
 
+#### estimateFileCost
+
+Estimate gas costs before uploading.
+
+Browser
+```javascript
+// <input id='fileToUpload' />
+const file = document.getElementById('fileToUpload').files[0];
+const cost = await flatDirectory.estimateFileCost("example1.txt", file);
+console.log(`Gas Cost: ${cost.gasCost}, Storage Cost: ${cost.storageCost}`);
+```
+
+Node
+```javascript
+const {NodeFile} = require("ethstorage-sdk/file");
+const file = new NodeFile("/usr/download/test.jpg");
+const cost = await flatDirectory.estimateFileCost("example1.txt", file);
+console.log(`Gas Cost: ${cost.gasCost}, Storage Cost: ${cost.storageCost}`);
+```
+
 #### upload
 
 Upload data to FlatDirectory.
@@ -168,6 +188,45 @@ await flatDirectory.upload(key, data, {
 });
 ```
 
+#### uploadFile
+
+Upload file object to FlatDirectory.
+
+Browser
+```javascript
+// <input id='fileToUpload' />
+const file = document.getElementById('fileToUpload').files[0];
+await flatDirectory.uploadFile(key, file, {
+    onProgress: function (progress, count) {
+        console.log(`Uploaded ${progress} of ${totalCount} chunks`);
+    },
+    onFail: function (err) {
+        console.log(err);
+    },
+    onSuccess: function (totalUploadChunks, totalUploadSize, totalStorageCost) {
+        console.log(`Total upload chunk count is ${totalUploadChunks}, size is ${totalUploadSize}, storage cost is ${totalStorageCost}`);
+    }
+});
+```
+
+Node
+```javascript
+const {NodeFile} = require("ethstorage-sdk/file");
+const file = new NodeFile("/usr/download/test.jpg");
+await flatDirectory.uploadFile(key, file, {
+    onProgress: function (progress, count) {
+        console.log(`Uploaded ${progress} of ${totalCount} chunks`);
+    },
+    onFail: function (err) {
+        console.log(err);
+    },
+    onSuccess: function (totalUploadChunks, totalUploadSize, totalStorageCost) {
+        console.log(`Total upload chunk count is ${totalUploadChunks}, size is ${totalUploadSize}, storage cost is ${totalStorageCost}`);
+    }
+});
+```
+
+
 #### download
 
 Download data from the EthStorage network.

package.json

@@ -4,6 +4,15 @@
   "description": "eip-4844 blobs upload sdk",
   "main": "dist/index.cjs.js",
   "module": "dist/index.esm.js",
+  "exports": {
+    ".": {
+      "require": "./dist/index.cjs.js",
+      "import": "./dist/index.esm.js"
+    },
+    "./file": {
+      "require": "./dist/file.cjs.js"
+    }
+  },
   "scripts": {
     "build": "rollup -c"
   },

rollup.config.mjs

@@ -3,9 +3,12 @@ import resolve from '@rollup/plugin-node-resolve';
 
 export default [
     {
-        input: "./src/index.js",
+        input: {
+            'index.cjs': './src/index.js',
+            'file.cjs': './src/node/file.js',
+        },
         output: {
-            file: 'dist/index.cjs.js', format: 'cjs', sourcemap: true
+            dir: 'dist', format: 'cjs', sourcemap: true
         },
         plugins: [commonjs(), resolve()],
         external: ["ethers", "kzg-wasm"]