Metaplexで「Attempt to debit an account but found no record of a prior credit.」エラー

現象

AnchorのテストコードにMetaplexを使ってdevnetでNFTをMintすると以下のエラー。

  myanc
    1) Is initialized!


  0 passing (12s)
  1 failing

  1) myanc
       Is initialized!:
     FailedToSendTransactionError: The transaction could not be sent successfully to the network. Please check the underlying error below for more details.

Source: RPC

Caused By: Error: failed to send transaction: Transaction simulation failed: Attempt to debit an account but found no record of a prior credit.

      at RpcClient.parseProgramError (node_modules/@metaplex-foundation/js/src/plugins/rpcModule/RpcClient.ts:336:14)
      at RpcClient.sendTransaction (node_modules/@metaplex-foundation/js/src/plugins/rpcModule/RpcClient.ts:128:18)
      at processTicksAndRejections (node:internal/process/task_queues:96:5)
      at RpcClient.sendAndConfirmTransaction (node_modules/@metaplex-foundation/js/src/plugins/rpcModule/RpcClient.ts:164:23)
      at TransactionBuilder.sendAndConfirm (node_modules/@metaplex-foundation/js/src/utils/TransactionBuilder.ts:197:22)
      at Object.handle (node_modules/@metaplex-foundation/js/src/plugins/nftModule/operations/createNft.ts:296:20)
      at Disposable.run (node_modules/@metaplex-foundation/js/src/utils/Disposable.ts:33:14)

tests/myanc.ts

    const metaplex = Metaplex.make(connection)
      .use(keypairIdentity(wallet))
      .use(bundlrStorage({
        address: 'https://devnet.bundlr.network',
        providerUrl: 'https://api.devnet.solana.com',
        timeout: 60000,
      }));

    const { uri } = await metaplex
      .nfts()
      .uploadMetadata({
        name: "My NFT Metadata",
        description: "My description",
        image: "https://placekitten.com/200/300",
      });

    const { nft } = await metaplex
      .nfts()
      .create({
        uri: uri,
        name: "My NFT",
        sellerFeeBasisPoints: 500, // Represents 5.00%.
        maxSupply: toBigNumber(1),
      });

原因

Mintに必要なSOL代が足りていないため。
1SOLをエアドロップしていたが、足りなかったらしい。

対応

画像サイズを小さくする（SOL代を少なくする）。
今回は、200x300の画像を20x30にサイズ縮小した。

tests/myanc.ts

    const { uri } = await metaplex
      .nfts()
      .uploadMetadata({
        name: "My NFT Metadata",
        description: "My description",
        image: "https://placekitten.com/20/30", // ← 20x30に変更
      });