Update

Author: kien-ngo

.changeset/six-drinks-joke.md

@@ -0,0 +1,5 @@
+---
+"thirdweb": minor
+---
+
+Add ERC1155 extension: mintToBatch

packages/thirdweb/src/exports/extensions/erc1155.ts

@@ -198,3 +198,8 @@ export {
 
 // Zora 1155 contract
 export { nextTokenId } from "../../extensions/erc1155/__generated__/Zora1155/read/nextTokenId.js";
+
+export {
+  mintToBatch,
+  type MintToBatchParams,
+} from "../../extensions/erc1155/write/mintToBatch.js";

packages/thirdweb/src/extensions/erc1155/write/mintToBatch.test.ts

@@ -0,0 +1,74 @@
+import { describe, expect, it } from "vitest";
+import { ANVIL_CHAIN } from "~test/chains.js";
+import { TEST_CONTRACT_URI } from "~test/ipfs-uris.js";
+import { TEST_CLIENT } from "~test/test-clients.js";
+import { TEST_ACCOUNT_C } from "~test/test-wallets.js";
+import { getContract } from "../../../contract/contract.js";
+import { deployERC1155Contract } from "../../../extensions/prebuilts/deploy-erc1155.js";
+import { sendAndConfirmTransaction } from "../../../transaction/actions/send-and-confirm-transaction.js";
+import { getNFTs } from "../read/getNFTs.js";
+import { mintToBatch } from "./mintToBatch.js";
+
+const chain = ANVIL_CHAIN;
+const client = TEST_CLIENT;
+const account = TEST_ACCOUNT_C;
+
+describe("ERC1155 Edition: mintToBatch", () => {
+  it("should mint multiple tokens in one tx", async () => {
+    const contract = getContract({
+      chain,
+      client,
+      address: await deployERC1155Contract({
+        chain,
+        client,
+        account,
+        type: "TokenERC1155",
+        params: {
+          name: "edition",
+          contractURI: TEST_CONTRACT_URI,
+        },
+      }),
+    });
+
+    await sendAndConfirmTransaction({
+      account,
+      transaction: mintToBatch({
+        contract,
+        to: account.address,
+        nfts: [
+          { metadata: { name: "token 0" }, supply: 1n },
+          { metadata: { name: "token 1" }, supply: 2n },
+          { metadata: { name: "token 2" }, supply: 3n },
+        ],
+      }),
+    });
+
+    const nfts = await getNFTs({ contract });
+    expect(nfts).toStrictEqual([
+      {
+        metadata: { name: "token 0" },
+        owner: null,
+        id: 0n,
+        tokenURI: "ipfs://QmPZ6LpGqMuFbHKTXrNW1NRNLHf1nrxS4dtoFqdZZTKvPX/0",
+        type: "ERC1155",
+        supply: 1n,
+      },
+      {
+        metadata: { name: "token 1" },
+        owner: null,
+        id: 1n,
+        tokenURI: "ipfs://QmRFPyc3yEYxR4pQxwyTQWTine51TxWCoD6nzJWR3eX45b/0",
+        type: "ERC1155",
+        supply: 2n,
+      },
+      {
+        metadata: { name: "token 2" },
+        owner: null,
+        id: 2n,
+        tokenURI: "ipfs://QmesQiRLHCgqWZM2GFCs7Nb7rr2S72hU1BVQc7xiTyKZtT/0",
+        type: "ERC1155",
+        supply: 3n,
+      },
+    ]);
+  });
+});

packages/thirdweb/src/extensions/erc1155/write/mintToBatch.ts

@@ -0,0 +1,56 @@
+import { maxUint256 } from "viem";
+import { multicall } from "../../../extensions/common/__generated__/IMulticall/write/multicall.js";
+import { upload } from "../../../storage/upload.js";
+import type {
+  BaseTransactionOptions,
+  WithOverrides,
+} from "../../../transaction/types.js";
+import type { NFTInput } from "../../../utils/nft/parseNft.js";
+import { encodeMintTo } from "../__generated__/IMintableERC1155/write/mintTo.js";
+
+export type MintToBatchParams = WithOverrides<{
+  to: string;
+  nfts: Array<{
+    supply: bigint;
+    metadata: NFTInput | string;
+  }>;
+}>;
+
+export function mintToBatch(
+  options: BaseTransactionOptions<MintToBatchParams>,
+) {
+  return multicall({
+    contract: options.contract,
+    asyncParams: async () => {
+      const uris = await Promise.all(
+        options.nfts.map((item) => {
+          if (typeof item.metadata === "string") {
+            return item.metadata;
+          }
+          return upload({
+            client: options.contract.client,
+            files: [item.metadata],
+          });
+        }),
+      );
+
+      const data = uris.map((uri, index) => {
+        const item = options.nfts[index];
+        if (!item) {
+          // Should not happen
+          throw new Error("Index mismatch");
+        }
+        return encodeMintTo({
+          to: options.to,
+          // maxUint256 is used to indicate that this is a NEW token!
+          tokenId: maxUint256,
+          uri,
+          amount: item.supply,
+        });
+      });
+
+      return { data };
+    },
+    overrides: options.overrides,
+  });
+}