feat: add example nft contract (#38)

Shows options that can be used for NFT features

Author: thephez

2-Contracts-and-Documents/contract-register-nft.js

@@ -0,0 +1,90 @@
+// See https://docs.dash.org/projects/platform/en/stable/docs/tutorials/contracts-and-documents/register-a-data-contract.html
+const setupDashClient = require('../setupDashClient');
+
+const client = setupDashClient();
+
+const registerContract = async () => {
+  const { platform } = client;
+  const identity = await platform.identities.get(process.env.IDENTITY_ID); // Your identity ID
+
+  const contractDocuments = {
+    card: {
+      type: "object",
+      documentsMutable: false, // true = documents can be modified (replaced)
+      canBeDeleted: true, // true = documents can be deleted (current bug prevents deletion when true if mutable is false)
+      transferable: 1, // 0 = transfers disabled; 1 = transfers enabled
+      tradeMode: 1, // 0 = no trading; 1 = direct purchases
+      creationRestrictionMode: 1, // 0 = anyone can mint; 1 = only contract owner can mint
+      properties: {
+        name: {
+          type: "string",
+          description: "Name of the card",
+          minLength: 0,
+          maxLength: 63,
+          position: 0
+        },
+        description: {
+          type: "string",
+          description: "Description of the card",
+          minLength: 0,
+          maxLength: 256,
+          position: 1
+        },
+        attack: {
+          type: "integer",
+          description: "Attack power of the card",
+          position: 2
+        },
+        defense: {
+          type: "integer",
+          description: "Defense level of the card",
+          position: 3
+        }
+      },
+      indices: [
+        {
+          name: "owner",
+          properties: [
+            {
+              $ownerId: "asc"
+            }
+          ]
+        },
+        {
+          name: "attack",
+          properties: [
+            {
+              attack: "asc"
+            }
+          ]
+        },
+        {
+          name: "defense",
+          properties: [
+            {
+              defense: "asc"
+            }
+          ]
+        }
+      ],
+      required: [
+        "name",
+        "attack",
+        "defense"
+      ],
+      additionalProperties: false
+    }
+  }
+
+  const contract = await platform.contracts.create(contractDocuments, identity);
+  console.dir({ contract: contract.toJSON() });
+
+  // Sign and submit the data contract
+  await platform.contracts.publish(contract, identity);
+  return contract;
+};
+
+registerContract()
+  .then((d) => console.log('Contract registered:\n', d.toJSON()))
+  .catch((e) => console.error('Something went wrong:\n', e))
+  .finally(() => client.disconnect());