diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..7a1537b
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,2 @@
+.idea
+node_modules
diff --git a/lib/Mangrove-reviews.ts b/lib/Mangrove-reviews.ts
new file mode 100644
index 0000000..f9ae2b0
--- /dev/null
+++ b/lib/Mangrove-reviews.ts
@@ -0,0 +1,296 @@
+import {Metadata, Review} from "./Review";
+import * as jwkToPem from "jwk-to-pem"
+import axios from "axios";
+import {EncryptJWT} from "jose"
+import {JWTPayload} from "jose/dist/types/types";
+
+export interface QueryParameters {
+    /**
+     * Search for reviews that have this string in `sub` or `opinion` field.
+     */
+    q: string,
+    /**
+     * Search for review with this `signature` value.
+     */
+    signature: string
+
+    /**
+     *  Reviews by issuer with the following PEM public key.
+    */
+    kid: string
+    /**
+     *  Reviews issued at this UNIX time.
+    */
+    iat: number
+    /**
+     *  Reviews with UNIX timestamp greater than this.
+    */
+    gt_iat: number
+    /**
+     *  Reviews of the given subject URI.
+    */
+    sub: string
+    /**
+     *  Reviews with the given rating.
+    */
+    rating: number
+    /**
+     *  Reviews with the given opinion.
+    */
+    opinion: string
+    /**
+     *  Maximum number of reviews to be returned.
+    */
+    limit: number
+    /**
+     *  Get only reviews with opinion text.
+    */
+    opinionated: boolean
+    /**
+     *  Include reviews of example subjects.
+    */
+    examples: boolean
+    /**
+     *  Include aggregate information about review issuers.
+    */
+    issuers: boolean
+    /**
+     *  Include aggregate information about reviews of returned reviews.
+    */
+    maresi_subjects: boolean
+
+}
+
+export class MangroveReviews {
+    /** The API of the server used for https://mangrove.reviews */
+    public static readonly ORIGINAL_API = 'https://api.mangrove.reviews'
+    private static readonly PRIVATE_KEY_METADATA = 'Mangrove private key'
+
+    /** Assembles JWT from base payload, mutates the payload as needed.
+     * @param keypair - WebCrypto keypair, can be generated with `generateKeypair`.
+     * @param {Payload} payload - Base {@link Payload} to be cleaned, it will be mutated.
+     * @returns {string} Mangrove Review encoded as JWT.
+     */
+    public static async signReview(keypair, payload: Review): Promise<string> {
+        payload = MangroveReviews.cleanPayload(payload)
+        const key = await jwkToPem.privateToPem(keypair.privateKey)
+        const algo = 'ES256'
+        const kid = await MangroveReviews.publicToPem(keypair.publicKey)
+        const jwk = await crypto.subtle.exportKey('jwk', keypair.publicKey)
+        return await new EncryptJWT(<JWTPayload>payload)
+            .setProtectedHeader({
+                alg: algo,
+                kid,
+                jwk,
+                enc: "utf-8"
+            })
+            .encrypt(key);
+    }
+
+    /**
+     * Submit a signed review to be stored in the database.
+     * @param {string} jwt Signed review in JWT format.
+     * @param {string} [api=ORIGINAL_API] API endpoint used to fetch the data.
+     * @returns {Promise} Resolves to "true" in case of successful insertion or rejects with errors.
+     */
+    public static submitReview(jwt, api = MangroveReviews.ORIGINAL_API) {
+        return axios.put(`${api}/submit/${jwt}`)
+    }
+
+    /**
+     * Composition of `signReview` and `submitReview`.
+     * @param keypair WebCrypto keypair, can be generated with `generateKeypair`.
+     * @param {Payload} payload Base {@link Payload} to be cleaned, it will be mutated.
+     * @param {string} [api=ORIGINAL_API] - API endpoint used to fetch the data.
+     */
+    static async signAndSubmitReview(keypair, payload, api = MangroveReviews.ORIGINAL_API) {
+        const jwt = await MangroveReviews.signReview(keypair, payload)
+        return MangroveReviews.submitReview(jwt, api)
+    }
+
+    /**
+     * Retrieve reviews which fulfill the query.
+     * @param {QueryParameters} query Query to be passed to API, see the API documentation for examples.
+
+     * @param api The api-endpoint to query; default: mangrove.reviews
+     */
+    public static async getReviews(query: QueryParameters, api = MangroveReviews.ORIGINAL_API): Promise<Review[]> {
+        const {data} = await axios.get(`${api}/reviews`, {
+            params: query,
+            headers: {'Content-Type': 'application/json'}
+        })
+        return data
+    }
+
+    /**
+     * Get aggregate information about the review subject.
+     * @param {string} uri URI of the review subject.
+     * @param {string} [api=ORIGINAL_API] API endpoint used to fetch the data.
+     */
+    public static getSubject(uri: string, api = MangroveReviews.ORIGINAL_API) {
+        return axios.get(`${api}/subject/${encodeURIComponent(uri)}`).then(({data}) => data)
+    }
+
+    /**
+     * Get aggregate information about the reviewer.
+     * @param {string} pem - Reviewer public key in PEM format.
+     * @param {string} [api=ORIGINAL_API] - API endpoint used to fetch the data.
+     */
+    public static getIssuer(pem, api = MangroveReviews.ORIGINAL_API) {
+        return axios.get(`${api}/issuer/${encodeURIComponent(pem)}`).then(({data}) => data)
+    }
+
+    /**
+     * Retrieve aggregates for multiple subjects or issuers.
+     * @param {Object} query Batch query listing identifiers to use for fetching.
+     * @param {string[]} [query.subs] A list of subject URIs to get aggregates for.
+     * @param {string[]} [query.pems] A list of issuer PEM public keys to get aggregates for.
+     * @param {string} [api=ORIGINAL_API] - API endpoint used to fetch the data.
+     */
+    public static batchAggregate(query, api = MangroveReviews.ORIGINAL_API) {
+        if (!query.pems && !query.subs) {
+            return null
+        }
+        return axios.post(`${api}/batch`, query).then(({data}) => data)
+    }
+
+    /**
+     * Generate a new user identity, which can be used for signing reviews and stored for later.
+     * @returns ECDSA
+     * [WebCrypto](https://developer.mozilla.org/en-US/docs/Web/API/Web_Crypto_API)
+     * key pair with `privateKey` and `publicKey`
+     */
+    public static generateKeypair(): Promise<CryptoKeyPair> {
+        return crypto.subtle
+            .generateKey(
+                {
+                    name: 'ECDSA',
+                    namedCurve: 'P-256'
+                },
+                true,
+                ['sign', 'verify']
+            )
+    }
+
+    /**
+     * Come back from JWK representation to representation which allows for signing.
+     * Import keys which were exported with `keypairToJwk`.
+     * @param jwk - Private JSON Web Key (JWK) to be converted in to a WebCrypto keypair.
+     */
+    public static async jwkToKeypair(jwk) {
+        // Do not mutate the argument.
+        let key = {...jwk}
+        if (!key || key.metadata !== MangroveReviews.PRIVATE_KEY_METADATA) {
+            throw new Error(
+                `does not contain the required metadata field "${MangroveReviews.PRIVATE_KEY_METADATA}"`
+            )
+        }
+        const sk = await crypto.subtle.importKey(
+            'jwk',
+            key,
+            {
+                name: 'ECDSA',
+                namedCurve: 'P-256'
+            },
+            true,
+            ['sign']
+        )
+        delete key.d
+        delete key.dp
+        delete key.dq
+        delete key.q
+        delete key.qi
+        key.key_ops = ['verify']
+        const pk = await crypto.subtle.importKey(
+            'jwk',
+            key,
+            {
+                name: 'ECDSA',
+                namedCurve: 'P-256'
+            },
+            true,
+            ['verify']
+        )
+        return {privateKey: sk, publicKey: pk}
+    }
+
+    /**
+     * Exports a keypair to JSON Web Key (JWK) of the private key.
+     * JWK is a format which can be then used to stringify and store.
+     * You can later import it back with `jwkToKeypair`.
+     * @param keypair - WebCrypto key pair, can be generate with `generateKeypair`.
+     */
+    public static async keypairToJwk(keypair) {
+        const s = await crypto.subtle.exportKey('jwk', keypair.privateKey)
+        s["metadata"] = MangroveReviews.PRIVATE_KEY_METADATA
+        return s
+    }
+
+    public static u8aToString(buf: ArrayBuffer) : string{
+        return new TextDecoder().decode(buf);
+        //return String.fromCharCode.apply(null, new Uint8Array(buf))
+    }
+
+    /**
+     * Get PEM represenation of the user "password".
+     * @param key - Private WebCrypto key to be exported.
+     */
+    public static async privateToPem(key) {
+        try {
+            const exported: ArrayBuffer = await crypto.subtle.exportKey('pkcs8', key)
+            const exportedAsString = MangroveReviews.u8aToString(exported)
+            const exportedAsBase64 = window.btoa(exportedAsString)
+            return `-----BEGIN PRIVATE KEY-----\n${exportedAsBase64}\n-----END PRIVATE KEY-----`
+        } catch {
+            // Workaround for Firefox webcrypto not working.
+            const exported = await crypto.subtle.exportKey('jwk', key)
+            return jwkToPem(exported, {private: true})
+        }
+    }
+
+    /**
+     * Get PEM representation of public reviewer identity.
+     * This format can be found in the `kid` field of a Mangrove Review Header.
+     * @param key - Public WebCrypto key to be exported.
+     */
+    public static async publicToPem(key: CryptoKey): Promise<string> {
+        const exported: ArrayBuffer = await crypto.subtle.exportKey('spki', key)
+        const exportedAsString = MangroveReviews.u8aToString(exported)
+        const exportedAsBase64 = btoa(exportedAsString)
+        // Do not add new lines so that its copyable from plain string representation.
+        return `-----BEGIN PUBLIC KEY-----${exportedAsBase64}-----END PUBLIC KEY-----`
+    }
+
+    /**
+     * Check and fill in the review payload so that its ready for signing.
+     * See the [Mangrove Review Standard](https://mangrove.reviews/standard)
+     * for more details.
+     * Has to include at least `sub` and `rating` or `opinion`.
+     * @param {Payload} payload Base {@link Payload} to be cleaned, it will be mutated.
+     * @returns {Payload} Payload ready to sign - the same as param 'PayLoad'.
+     */
+    private static cleanPayload(payload: Review): Review {
+        if (!payload.sub) throw 'Payload must include subject URI in `sub` field.'
+        if (!payload.rating && !payload.opinion) throw 'Payload must include either rating or opinion.'
+        if (payload.rating !== undefined) {
+            if (payload.rating < 0 || payload.rating > 100) throw 'Rating must be in the range from 0 to 100.'
+        }
+        payload.iat = Math.floor(Date.now() / 1000)
+        if (payload.rating === null) delete payload.rating
+        if (!payload.opinion) delete payload.opinion
+        if (!payload.images || !payload.images.length) delete payload.images
+        const meta: Metadata = {client_id: window.location.href, ...payload.metadata}
+        for (const key in meta) {
+            const value = meta[key]
+            if (value === null || value === false) {
+                delete meta[key]
+            }
+        }
+        payload.metadata = meta
+        return payload
+    }
+
+
+
+}
+
diff --git a/lib/Review.ts b/lib/Review.ts
new file mode 100644
index 0000000..f223dff
--- /dev/null
+++ b/lib/Review.ts
@@ -0,0 +1,92 @@
+import {JWTPayload} from "jose/dist/types/types";
+
+export interface Metadata extends JWTPayload{
+
+    /**
+     * Identity of the client used to leave the review, gets populated if not provided.
+     */
+    client_id: string
+
+    /**
+     * Nickname of the reviewer.
+     */
+    nickname?: string
+    given_name?: string
+    family_name?: string
+    
+    age?: number
+    
+    gender?: string
+
+    /**
+     * The context in which the reviewer primarly had the experience with the subject
+     */
+    experience_context?: `business` | `family` | `couple` |`friends` | `solo`
+
+    /**
+     * Please set this flag to `true` when the reviewer had direct experience with the subject of the review
+     */
+    is_personal_experience?: boolean
+
+
+    /**
+     * Please set this flag to `true` when the review is left owner, employee of other affiliated person.
+     */
+    is_affiliated?: boolean
+
+
+    /**
+     * Please set this flag to `true` when review was automatically generated by a bot.
+     */
+    is_generated?: boolean
+
+    
+    /** Please provide the source of the review
+     *  if the review does not originate from the author.
+     */
+    data_source?: string
+}
+
+export interface Review {
+    /**
+     * URI of the review subject.
+     */
+    sub: string
+    /**
+     *  Rating of subject between 0 and 100.
+     */
+    rating?: number
+
+    /**
+     * Opinion of subject with at most 500 characters.
+     */
+    opinion?: string
+    
+    /**
+     * Unix timestamp of when review was issued,
+     *  gets filled in automatically if not provided.
+     */
+    iat: number
+
+    /**
+     * Array of up to 5 images to be included.
+     */
+    images?: {
+        /**
+         * Public URL of an image.
+         */
+        src: string
+        /**
+         * Optional label of an image.
+         */
+        label?: string
+    }[]
+    
+    /**
+     *  Any {@link Metadata} relating to the issuer or circumstances of leaving review.
+     *  See the [Mangrove Review Standard](https://mangrove.reviews/standard) for more.
+     */
+    metadata?: Metadata
+}
+
+ 
\ No newline at end of file
diff --git a/lib/index.ts b/lib/index.ts
new file mode 100644
index 0000000..de8be9e
--- /dev/null
+++ b/lib/index.ts
@@ -0,0 +1,3 @@
+import {Review,Metadata} from "./Review";
+import {MangroveReviews} from "./Mangrove-reviews";
+export {Review, Metadata, MangroveReviews}
\ No newline at end of file
diff --git a/package-lock.json b/package-lock.json
new file mode 100644
index 0000000..1338d0a
--- /dev/null
+++ b/package-lock.json
@@ -0,0 +1,394 @@
+{
+  "name": "mangrove-reviews-typescript",
+  "version": "0.0.1",
+  "lockfileVersion": 2,
+  "requires": true,
+  "packages": {
+    "": {
+      "name": "mangrove-reviews-typescript",
+      "version": "0.0.1",
+      "license": "GPL-2.0-only",
+      "dependencies": {
+        "axios": "^1.2.3",
+        "jose": "^4.11.2",
+        "jwk-to-pem": "^2.0.5",
+        "typescript": "^4.9.4"
+      }
+    },
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diff --git a/package.json b/package.json
new file mode 100644
index 0000000..60d1306
--- /dev/null
+++ b/package.json
@@ -0,0 +1,29 @@
+{
+  "name": "mangrove-reviews-typescript",
+  "version": "0.0.1",
+  "description": "A library to interface with Mangrove.reviews",
+  "main": "lib/index.ts",
+  "scripts": {
+    "build": "tsc -project .",
+  },
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/pietervdvn/Mangrove-reviews-typescript.git"
+  },
+  "keywords": [
+    "mangrove",
+    "reviews"
+  ],
+  "author": "Pieter Vander Vennet",
+  "license": "GPL-2.0-only",
+  "bugs": {
+    "url": "https://github.com/pietervdvn/Mangrove-reviews-typescript/issues"
+  },
+  "homepage": "https://github.com/pietervdvn/Mangrove-reviews-typescript#readme",
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+}
diff --git a/tsconfig.json b/tsconfig.json
new file mode 100644
index 0000000..d77253b
--- /dev/null
+++ b/tsconfig.json
@@ -0,0 +1,27 @@
+{
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+    "preserveConstEnums": true,
+    "suppressImplicitAnyIndexErrors": true
+  },
+  "include": [
+    "lib/*"
+  ],
+  "exclude": [  ]
+}
\ No newline at end of file