diff --git a/sdk/README.md b/sdk/README.md
index 98fec480..d7939501 100644
--- a/sdk/README.md
+++ b/sdk/README.md
@@ -2,11 +2,9 @@
 
 The Verax SDK facilitates the interactions with the contracts and the subgraph, both from a frontend and a backend.
 
-[DRAFT]
-
 ## Installation
 
-VeraxSDK is a [npm package](https://www.npmjs.com/package/@verax-attestation-registry/verax-sdk/).
+VeraxSDK is an [npm package](https://www.npmjs.com/package/@verax-attestation-registry/verax-sdk/).
 
 ```bash
 # npm
@@ -27,33 +25,47 @@ pnpm add @verax-attestation-registry/verax-sdk
 
 ### 1. Import VeraxSdk
 
-```js
-// CommonJS
+```javascript
+// JavaScript
 var VeraxSdk = require("@verax-attestation-registry/verax-sdk");
 ```
 
-```js
-// ES6
+```typescript
+// TypeScript
 import VeraxSdk from "@verax-attestation-registry/verax-sdk";
 ```
 
 ### 2. Instantiate VeraxSdk
 
-```js
-// Default configuration for Linea Testnet
+```javascript
+// Default configuration for Linea Testnet on a backend
 const veraxSdk = new VeraxSdk(VeraxSdk.DEFAULT_LINEA_TESTNET);
 ```
 
 or,
 
-```js
-// Default configuration for Linea Mainnet
+```javascript
+// Default configuration for Linea Mainnet on a backend
 const veraxSdk = new VeraxSdk(VeraxSdk.DEFAULT_LINEA_MAINNET);
 ```
 
 or,
 
-```js
+```javascript
+// Default configuration for Linea Testnet on a frontend
+const veraxSdk = new VeraxSdk(VeraxSdk.DEFAULT_LINEA_TESTNET_FRONTEND);
+```
+
+or,
+
+```javascript
+// Default configuration for Linea Mainnet on a frontend
+const veraxSdk = new VeraxSdk(VeraxSdk.DEFAULT_LINEA_MAINNET_FRONTEND);
+```
+
+or,
+
+```javascript
 // Custom configuration
 const myVeraxConfiguration = {
   chain: lineaTestnet,
@@ -71,20 +83,20 @@ const veraxSdk = new VeraxSdk(myVeraxConfiguration);
 
 ### 1. Get DataMappers
 
-```js
-// Each Verax classes has its DataMapper
+```javascript
+// Each Verax object has its DataMapper
 // Get them from the SDK instance
+const attestationDataMapper = veraxSdk.attestation; // RW Attestations
+const moduleDataMapper = veraxSdk.module; // RW Modules
 const portalDataMapper = veraxSdk.portal; // RW Portals
 const schemaDataMapper = veraxSdk.schema; // RW Schemas
-const moduleDataMapper = veraxSdk.module; // RW Modules
-const attestationDataMapper = veraxSdk.attestation; // RW Attestations
 ```
 
 ### 2. Read content (one object)
 
 Each DataMapper comes with the method `findOneById` to get one object by ID.
 
-```js
+```typescript
 const myAttestation = await attestationDataMapper.findOneById("12345");
 console.log(myAttestation);
 
@@ -100,28 +112,26 @@ console.log(myAttestation);
 
 Each DataMapper comes with the method `findBy` to get objects by criteria.
 
-```js
+```typescript
 //
 // args:
-// 	- criteria: object {property1: value1, property2: value2, ...}
-// 	- page: integer (optional, default 0)
-// 	- offset: integer (optional, default 50, max= 500)
-// 	- orderBy: string (optional, default createdAt)
-// 	- order(property?): enum string "ASC", "DESC" (optional, default "DESC")
+// 	- first: number (optional, default 100)
+// 	- skip: number (optional, default 0)
+// 	- where: object (optional, default `null`)
+// 	- orderBy: string (optional, default `null`)
+// 	- orderDirection: enum string "ASC", "DESC" (optional, default `null`)
 //
 const myAttestations = await attestationDataMapper.findBy(
-  { portalId: "37773", subject: "John" },
   4,
   30,
+  { portalId: "37773", subject: "John" },
   "schemaId",
-  "ASC",
+  "asc",
 );
 
 console.log(myAttestations);
 //
-// totalNumber: 147,
-// page: 0,
-// objects: [
+// [
 // 	{id: "12345", schemaId: "99AE34", portalId: "37773", subject: "Florian", ...},
 // 	{id: "2221E", schemaId: "AAF77E", portalId: "37773", subject: "Florian", ...},
 // 	...
@@ -131,50 +141,40 @@ console.log(myAttestations);
 
 ### 4. Write content
 
-[WORK IN PROGRESS] Each dataMapper comes with write methods, that may vary depending on the class. See the detail of
-write method per class dataMapper.
+Each DataMapper comes with write methods, that may vary depending on the class. See the detail of write method per
+DataMapper.
 
-```js
-const result = await attestationDataMapper.attest(
+```typescript
+const transactionHash = await attestationDataMapper.attest(
+  "0x123ABC...", // portalAddress
   {
+    // attestationPayload
     schemaId: "muhpoih",
-    portalId: "OJOJ43432",
     expirationDate: null,
-    subject: "florian.demiramon@...",
-    data: {
+    subject: "0xdeadbeef...",
+    attestationData: {
       foo: "bar",
       zee: "plop",
     },
   },
-  signer,
+  ["..."], // validationPayloads
 );
 
-console.log(result);
+console.log(transactionHash);
 //
-// txReceipt: ....
-// object: {
-//		{
-//		id: "0XAZFZF"
-//		schemaId: "muhpoih"
-//		portalId: "OJOJ43432"
-//		expirationDate: null
-//		subject: "florian.demiramon@..."
-//		attestationData: {
-//				foo: "bar",
-//				zee: "plop"
-//			}
-//		attestationRawData: "1234234124124FAAZC"
-//		replacedBy: null
-//		attester: "0x1111"
-//		attestedDate: "today"
-//		revocationDate: null
-//		version: 1
-//		revoked: false
-//		}
+// 0x...
 //
 ```
 
-## CLI examples
+## 5. Other operations
+
+The class `veraxSdk.utils` extends the capabilities:
+
+- precompute the ID of an Attestation
+- precompute the ID of a Schema
+- encode/decode an attestation payload
+
+## 6. CLI examples
 
 You can use command lines to test all the implemented SDK methods. Here are some examples.
 
@@ -298,11 +298,3 @@ pnpm schema isRegistered "0x9ba590dd7fbd5bd1a7d06cdcb4744e20a49b3520560575cd63de
 
 pnpm schema getSchemaIds 0
 ```
-
-## Other operations
-
-[Work in progress] The class `veraxSdk.utils` extends the capabilities:
-
-- precompute the ID of an Attestation
-- precompute the ID of a Schema
-- encode decode payload