-
-
-### How to run locally
-
-#### 1. Build the contract
-
-The contract metadata JSON is required to interact with the contract from the frontend. You can obtain this by building
-the contract sources. Run the following command from the root of the repository to build the contract.
-
-```bash
-docker run --rm -it -v $(pwd):/sources paritytech/contracts-ci-linux:production \
- cargo +nightly contract build --manifest-path=/sources/contracts/Cargo.toml
-```
-
-#### 2. Install packages and set up environment variables
-
-```bash
-npm install
-
-npm run setup
-```
-
-#### 3. Fund your test account
-
-##### 3a. Wallet Setup
-
-You will need to have a test account present in a polkadot wallet. Choose either
-[talisman](https://chrome.google.com/webstore/detail/talisman-polkadot-wallet/fijngjgcjhjmmpcmkeiomlglpeiijkld)
-, [subwallet](https://chrome.google.com/webstore/detail/subwallet-polkadot-extens/onhogfjeacnfoofkfgppdlbmlmnplgbn)
-or [polkadotjs](https://polkadot.js.org/extension/). Please only install *one* wallet in your browser! Once you have
-installed a wallet, create an account.
-
-##### 3b. Send some funds to your wallet
-
-Go to [polkadot apps](https://polkadot.js.org/apps/?rpc=ws%3A%2F%2F127.0.0.1%3A9944#/accounts) and select the
-development endpoint (`ws://localhost:9944`).
-
-
-
-Send some funds from one of the test accounts (Alice etc.) to your test account.
-
-
-
-#### 4. Start the app
-
-```bash
-npm run dev
-```
-
-### How it works
-
-The NFT marketplace is composed of two parts - the website and the smart contract backend. A user is requested to
-connect their web3 account when they enter the marketplace.
-
-
-
-Once an account has been selected they can begin the purchase process. Upon clicking buy, the website frontend checks if
-the user's account has previously completed captcha challenges by calling
-the [prosopo protocol contract](https://github.com/prosopo/protocol/). If the user has answered the majority of
-previous captcha challenges correctly within a certain timeframe, they will be allowed to purchase an NFT. Otherwise,
-they will be shown a captcha challenge.
-
-#### `is_human` checks in Dapp frontend website
-
-The frontend checks the `is_human` function in the protocol contract before it allows the user to purchase.
-
-https://github.com/prosopo/demo-nft-marketplace/blob/65669d7d3909bb287718b028e95e013f1c29ee78/src/components/Modal/CheckoutModal.tsx#L49-L59
-
-#### `is_human` checks in NFT Contract
-
-There are additional checks in the NFT marketplace smart contract that prevent the user from calling the NFT marketplace
-contract directly, bypassing the frontend checks.
-
-The threshold number of captcha that the user must correctly answer is set to 80% within the last 5 minutes. In this
-example, the values are fixed in the NFT contract however they could reside elsewhere.
-
-https://github.com/prosopo/demo-nft-marketplace/blob/65669d7d3909bb287718b028e95e013f1c29ee78/contracts/lib.rs#L78-L79
-
-https://github.com/prosopo/demo-nft-marketplace/blob/65669d7d3909bb287718b028e95e013f1c29ee78/contracts/lib.rs#L203-L217
-
-https://github.com/prosopo/demo-nft-marketplace/blob/65669d7d3909bb287718b028e95e013f1c29ee78/contracts/lib.rs#L186-L200
-
-### Flow
-
-The entire process flow can be visualised as follows.
-
-
diff --git a/demos/demo-nft-marketplace/assets/img-endpoint.png b/demos/demo-nft-marketplace/assets/img-endpoint.png
deleted file mode 100644
index 712c82b8f7..0000000000
Binary files a/demos/demo-nft-marketplace/assets/img-endpoint.png and /dev/null differ
diff --git a/demos/demo-nft-marketplace/assets/img-send-funds.png b/demos/demo-nft-marketplace/assets/img-send-funds.png
deleted file mode 100644
index 3ca871fe4c..0000000000
Binary files a/demos/demo-nft-marketplace/assets/img-send-funds.png and /dev/null differ
diff --git a/demos/demo-nft-marketplace/contracts/Cargo.toml b/demos/demo-nft-marketplace/contracts/Cargo.toml
deleted file mode 100644
index 61acc8933b..0000000000
--- a/demos/demo-nft-marketplace/contracts/Cargo.toml
+++ /dev/null
@@ -1,35 +0,0 @@
-[package]
-name = "demo_nft_contract"
-version = "0.2.0"
-authors = ["Sinisa Canak sinisa.canak997@gmail.com"]
-edition = "2021"
-
-[dependencies]
-ink = { git = "https://github.com/paritytech/ink", rev="4655a8b4413cb50cbc38d1b7c173ad426ab06cde", default-features = false }
-scale = { package = "parity-scale-codec", version = "3", default-features = false, features = ["derive"] }
-scale-info = { version = "2.3", default-features = false, features = ["derive"], optional = true }
-openbrush = { rev="14ff655a0d83440f40c57c82d9a33e4c5b981da7", git = "https://github.com/727-Ventures/openbrush-contracts", default-features = false, features = ["psp34", "ownable"] }
-prosopo = { git = "https://github.com/prosopo/protocol", branch = "inkv4", default-features = false, features = ["ink-as-dependency"] }
-base64 = { version = "0.13.0", default-features = false, features = ["alloc"] }
-serde = { version = "1.0", default-features = false, features = ["derive", "alloc"] }
-serde-json-core = { version = "0.4.0", default-features = false, features = ["heapless"] }
-
-[lib]
-name = "demo_nft_contract"
-path = "lib.rs"
-crate-type = [
- # Used for normal contract Wasm blobs.
- "cdylib",
-]
-
-[features]
-default = ["std"]
-std = [
- "ink/std",
- "scale/std",
- "scale-info/std",
- "openbrush/std",
- "prosopo/std",
- "serde-json-core/std"
-]
-ink-as-dependency = []
diff --git a/demos/demo-nft-marketplace/contracts/lib.rs b/demos/demo-nft-marketplace/contracts/lib.rs
deleted file mode 100644
index 8337ea8024..0000000000
--- a/demos/demo-nft-marketplace/contracts/lib.rs
+++ /dev/null
@@ -1,341 +0,0 @@
-#![cfg_attr(not(feature = "std"), no_std)]
-#![feature(min_specialization)]
-
-mod nfts;
-
-#[brush::contract]
-pub mod demo_nft_contract {
- use base64;
- use serde_json_core as serde_json;
-
- use openbrush::{
- contracts::{
- ownable::*,
- psp34::extensions::{enumerable::*, metadata::*},
- },
- modifiers,
- };
-
- use ink::prelude::format;
- use ink::prelude::{string::String, vec::Vec};
- use ink::storage::traits::SpreadAllocate;
-
- use prosopo::ProsopoRef;
-
- use crate::nfts::{self, *};
-
- #[derive(
- Default,
- SpreadAllocate,
- PSP34Storage,
- PSP34MetadataStorage,
- PSP34EnumerableStorage,
- OwnableStorage,
- )]
- #[ink(storage)]
- pub struct DemoNFT {
- #[PSP34StorageField]
- psp34: PSP34Data,
- next_id: u8,
- #[PSP34MetadataStorageField]
- metadata: PSP34MetadataData,
- #[PSP34EnumerableStorageField]
- enumdata: PSP34EnumerableData,
- #[OwnableStorageField]
- ownable: OwnableData,
- // / The address of the prosopo bot protection contract
- prosopo_account: AccountId,
- }
-
- #[derive(scale::Encode, scale::Decode)]
- #[cfg_attr(feature = "std", derive(scale_info::TypeInfo))]
- pub struct NFT {
- id: Id,
- owner: AccountId,
- token_uri: String,
- on_sale: bool,
- price: u128,
- }
-
- enum Attribute {
- TokenUri,
- OnSale,
- Price,
- }
-
- impl Attribute {
- pub fn to_key(&self) -> Vec
-
-
-
-
- {/*// LEFT SIDE CONTENT*/}
- {token.meta.name}
-
-
-
- {/*RIGHT SIDE CONTENT*/}
-
-
-
-
- {token.onSale ? `On sale for ${price}` : 'Not for sale'}
- -{token.meta.description}
- -
-
- {renderButton()}
-
-
- Owner
-