Add mint() to AssetScheme class

src/AssetTransferAddress.ts

@@ -89,4 +89,18 @@ export class AssetTransferAddress {
         const payload = toHex(Buffer.from(bytes.slice(2)));
         return new this(type, new H256(payload), address);
     }
+
+    getLockScriptHashAndParameters(): { lockScriptHash: H256, parameters: Buffer[] } {
+        const { type, payload } = this;
+        switch (type) {
+            case 0x00:
+                return { lockScriptHash: payload, parameters: [] };
+            case 0x01:
+                // FIXME:
+                const lockScriptHash = new H256("0000000000000000000000000000000000000000000000000000000000000000");
+                return { lockScriptHash, parameters: [Buffer.from(payload.value, "hex")] };
+            default:
+                throw "Unreachable";
+        }
+    }
 }

src/primitives/AssetScheme.ts

@@ -1,4 +1,6 @@
 import { H160 } from ".";
+import { AssetTransferAddress } from "../AssetTransferAddress";
+import { AssetMintTransaction } from "./transaction/AssetMintTransaction";
 
 export type AssetSchemeData = {
     metadata: string;
@@ -31,4 +33,16 @@ export class AssetScheme {
             registrar: registrar === null ? null : registrar.value
         };
     }
+
+    mint(address: AssetTransferAddress, options: { nonce?: number } = {}): AssetMintTransaction {
+        const { nonce = 0 } = options;
+        const { metadata, amount, registrar } = this;
+        return new AssetMintTransaction({
+            metadata,
+            registrar,
+            amount,
+            nonce,
+            ...address.getLockScriptHashAndParameters(),
+        });
+    }
 }