🏀 CryptoDunk – A Web3 NFT Marketplace on the Internet Computer

CryptoDunk is a decentralized NFT marketplace inspired by OpenSea, built using React for the frontend and Motoko for the backend. It allows users to mint, buy, and sell NFTs securely on the Internet Computer Protocol (ICP).

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🚀 Features

• 🎨 Mint your own NFTs directly from the browser
• 💼 Buy and sell NFTs in a fully decentralized environment
• 👤 Internet Identity-based authentication (via DFINITY's AuthClient)
• 🧠 Learn-by-building Web3 architecture using Motoko canisters
• 🔗 NFTs are deployed as separate canisters with persistent data

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🧰 Tech Stack

Layer	Tech
Frontend	React, JavaScript
Backend	Motoko (Internet Computer SDK)
Auth	DFINITY @dfinity/auth-client
Platform	Internet Computer (ICP)
Build Tools	DFX, Webpack, npm

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📦 Installation & Setup

Prerequisites

• Node.js (v16 or higher)
• DFX SDK

Run Locally

bash Deploy canisters

dfx deploy --argument='("CryptoDunks #123", principal "first-dhcgk-hdur2-vkop6-lpaxe-a6px7-ap6hu-gb47n-2puob-gopxa-nqe", (vec {137; 80; 78; 71; 13; 10; 26; 10; 0; 0; 0; 13; 73; 72; 68; 82; 0; 0; 0; 10; 0; 0; 0; 10; 8; 6; 0; 0; 0; 141; 50; 207; 189; 0; 0; 0; 1; 115; 82; 71; 66; 0; 174; 206; 28; 233; 0; 0; 0; 68; 101; 88; 73; 102; 77; 77; 0; 42; 0; 0; 0; 8; 0; 1; 135; 105; 0; 4; 0; 0; 0; 1; 0; 0; 0; 26; 0; 0; 0; 0; 0; 3; 160; 1; 0; 3; 0; 0; 0; 1; 0; 1; 0; 0; 160; 2; 0; 4; 0; 0; 0; 1; 0; 0; 0; 10; 160; 3; 0; 4; 0; 0; 0; 1; 0; 0; 0; 10; 0; 0; 0; 0; 59; 120; 184; 245; 0; 0; 0; 113; 73; 68; 65; 84; 24; 25; 133; 143; 203; 13; 128; 48; 12; 67; 147; 94; 97; 30; 24; 0; 198; 134; 1; 96; 30; 56; 151; 56; 212; 85; 68; 17; 88; 106; 243; 241; 235; 39; 42; 183; 114; 137; 12; 106; 73; 236; 105; 98; 227; 152; 6; 193; 42; 114; 40; 214; 126; 50; 52; 8; 74; 183; 108; 158; 159; 243; 40; 253; 186; 75; 122; 131; 64; 0; 160; 192; 168; 109; 241; 47; 244; 154; 152; 112; 237; 159; 252; 105; 64; 95; 48; 61; 12; 3; 61; 167; 244; 38; 33; 43; 148; 96; 3; 71; 8; 102; 4; 43; 140; 164; 168; 250; 23; 219; 242; 38; 84; 91; 18; 112; 63; 0; 0; 0; 0; 73; 69; 78; 68; 174; 66; 96; 130;}))'

Creating NFT for Testing

1. Mint an NFT on the command line to get NFT into mapOfNFTs:

dfx canister call opend mint '(vec {137; 80; 78; 71; 13; 10; 26; 10; 0; 0; 0; 13; 73; 72; 68; 82; 0; 0; 0; 10; 0; 0; 0; 10; 8; 6; 0; 0; 0; 141; 50; 207; 189; 0; 0; 0; 1; 115; 82; 71; 66; 0; 174; 206; 28; 233; 0; 0; 0; 68; 101; 88; 73; 102; 77; 77; 0; 42; 0; 0; 0; 8; 0; 1; 135; 105; 0; 4; 0; 0; 0; 1; 0; 0; 0; 26; 0; 0; 0; 0; 0; 3; 160; 1; 0; 3; 0; 0; 0; 1; 0; 1; 0; 0; 160; 2; 0; 4; 0; 0; 0; 1; 0; 0; 0; 10; 160; 3; 0; 4; 0; 0; 0; 1; 0; 0; 0; 10; 0; 0; 0; 0; 59; 120; 184; 245; 0; 0; 0; 113; 73; 68; 65; 84; 24; 25; 133; 143; 203; 13; 128; 48; 12; 67; 147; 94; 97; 30; 24; 0; 198; 134; 1; 96; 30; 56; 151; 56; 212; 85; 68; 17; 88; 106; 243; 241; 235; 39; 42; 183; 114; 137; 12; 106; 73; 236; 105; 98; 227; 152; 6; 193; 42; 114; 40; 214; 126; 50; 52; 8; 74; 183; 108; 158; 159; 243; 40; 253; 186; 75; 122; 131; 64; 0; 160; 192; 168; 109; 241; 47; 244; 154; 152; 112; 237; 159; 252; 105; 64; 95; 48; 61; 12; 3; 61; 167; 244; 38; 33; 43; 148; 96; 3; 71; 8; 102; 4; 43; 140; 164; 168; 250; 23; 219; 242; 38; 84; 91; 18; 112; 63; 0; 0; 0; 0; 73; 69; 78; 68; 174; 66; 96; 130;}, "CryptoDunks #123")'

2. List the item into mapOfListings:

dfx canister call opend listItem '(principal "<Replace with Minted Canister>", 2)'

3. Get OpenD canister ID:

dfx canister id opend

4. Transfer NFT to OpenD:

dfx canister call <Replace with Minted Canister> transferOwnership '(principal "<YOUR CANISTER ID>", true)'