solana-program-examples/tokens/token-2022/metadata/anchor/tests/metadata.ts

import * as anchor from "@coral-xyz/anchor";
import { Program } from "@coral-xyz/anchor";
import { Metadata } from "../target/types/metadata";
import { unpack } from "@solana/spl-token-metadata";

describe("metadata", () => {
  const provider = anchor.AnchorProvider.env();
  anchor.setProvider(provider);

  const program = anchor.workspace.Metadata as Program<Metadata>;

  const mintKeypair = new anchor.web3.Keypair();

  const metadata = {
    name: "OPOS",
    symbol: "OPOS",
    uri: "https://raw.githubusercontent.com/solana-developers/opos-asset/main/assets/DeveloperPortal/metadata.json",
  };

  it("Create Mint with MetadataPointer and TokenMetadata Extensions", async () => {
    const tx = await program.methods
      .initialize(metadata)
      .accounts({ mintAccount: mintKeypair.publicKey })
      .signers([mintKeypair])
      .rpc({ skipPreflight: true });
    console.log("Your transaction signature", tx);
  });

  it("Update existing metadata field", async () => {
    // Add your test here.
    const tx = await program.methods
      .updateField({
        field: { name: {} }, // Update the name field
        value: "Solana",
      })
      .accounts({ mintAccount: mintKeypair.publicKey })
      .rpc({ skipPreflight: true });
    console.log("Your transaction signature", tx);
  });

  it("Update metadata with custom field", async () => {
    const tx = await program.methods
      .updateField({
        field: { key: { 0: "color" } }, // Add a custom field named "color"
        value: "red",
      })
      .accounts({ mintAccount: mintKeypair.publicKey })
      .rpc({ skipPreflight: true });
    console.log("Your transaction signature", tx);
  });

  it("Remove custom field", async () => {
    const tx = await program.methods
      .removeKey("color") // Remove the custom field named "color"
      .accounts({ mintAccount: mintKeypair.publicKey })
      .rpc({ skipPreflight: true });
    console.log("Your transaction signature", tx);
  });

  it("Change update authority", async () => {
    const tx = await program.methods
      .updateAuthority()
      .accounts({
        mintAccount: mintKeypair.publicKey,
        newAuthority: null, // Set the update authority to null
      })
      .rpc({ skipPreflight: true });
    console.log("Your transaction signature", tx);
  });

  it("Emit metadata, decode transaction logs", async () => {
    const txSignature = await program.methods
      .emit()
      .accounts({ mintAccount: mintKeypair.publicKey })
      .rpc({ commitment: "confirmed", skipPreflight: true });
    console.log("Your transaction signature", txSignature);

    // Fetch the transaction response
    const transactionResponse = await provider.connection.getTransaction(
      txSignature,
      {
        commitment: "confirmed",
      }
    );

    // Extract the log message that starts with "Program return:"
    const prefix = "Program return: ";
    let log = transactionResponse.meta.logMessages.find((log) =>
      log.startsWith(prefix)
    );
    log = log.slice(prefix.length);
    const [_, data] = log.split(" ", 2);

    // Decode the data from base64 and unpack it into TokenMetadata
    const buffer = Buffer.from(data, "base64");
    const metadata = unpack(buffer);
    console.log("Metadata", metadata);
  });

  it("Emit metadata, decode simulated transaction", async () => {
    const simulateResponse = await program.methods
      .emit()
      .accounts({ mintAccount: mintKeypair.publicKey })
      .simulate();

    // Extract the log message that starts with "Program return:"
    const prefix = "Program return: ";
    let log = simulateResponse.raw.find((log) => log.startsWith(prefix));
    log = log.slice(prefix.length);
    const [_, data] = log.split(" ", 2);

    // Decode the data from base64 and unpack it into TokenMetadata
    const buffer = Buffer.from(data, "base64");
    const metadata = unpack(buffer);
    console.log("Metadata", metadata);
  });
});