solana-program-examples/compression/cutils/anchor/tests/utils/utils.ts

import { PROGRAM_ID as BUBBLEGUM_PROGRAM_ID } from '@metaplex-foundation/mpl-bubblegum/dist/src/generated';
import { PROGRAM_ID as TOKEN_METADATA_PROGRAM_ID } from '@metaplex-foundation/mpl-token-metadata/dist/src/generated';
import { SPL_ACCOUNT_COMPRESSION_PROGRAM_ID, SPL_NOOP_PROGRAM_ID } from '@solana/spl-account-compression';
import { type AccountMeta, PublicKey, SystemProgram } from '@solana/web3.js';
import * as bs58 from 'bs58';

export function decode(stuff: string) {
  return bufferToArray(bs58.decode(stuff));
}
function bufferToArray(buffer: Buffer): number[] {
  const nums: number[] = [];
  for (let i = 0; i < buffer.length; i++) {
    nums.push(buffer[i]);
  }
  return nums;
}
export const mapProof = (assetProof: { proof: string[] }): AccountMeta[] => {
  if (!assetProof.proof || assetProof.proof.length === 0) {
    throw new Error('Proof is empty');
  }
  return assetProof.proof.map((node) => ({
    pubkey: new PublicKey(node),
    isSigner: false,
    isWritable: false,
  }));
};

export function getAccounts(collectionMint: PublicKey, tree: PublicKey) {
  // treeAuth
  const [treeAuthority] = PublicKey.findProgramAddressSync([tree.toBuffer()], BUBBLEGUM_PROGRAM_ID);

  // derive a PDA (owned by Bubblegum) to act as the signer of the compressed minting
  const [bubblegumSigner] = PublicKey.findProgramAddressSync(
    // `collection_cpi` is a custom prefix required by the Bubblegum program
    [Buffer.from('collection_cpi', 'utf8')],
    BUBBLEGUM_PROGRAM_ID,
  );

  // collection metadata account
  const [metadataAccount] = PublicKey.findProgramAddressSync(
    [Buffer.from('metadata', 'utf8'), TOKEN_METADATA_PROGRAM_ID.toBuffer(), collectionMint.toBuffer()],
    TOKEN_METADATA_PROGRAM_ID,
  );

  // collection master edition
  const [masterEditionAccount] = PublicKey.findProgramAddressSync(
    [Buffer.from('metadata', 'utf8'), TOKEN_METADATA_PROGRAM_ID.toBuffer(), collectionMint.toBuffer(), Buffer.from('edition', 'utf8')],
    TOKEN_METADATA_PROGRAM_ID,
  );

  return {
    treeAuthority,
    collectionMint,
    collectionMetadata: metadataAccount,
    editionAccount: masterEditionAccount,
    merkleTree: tree,

    bubblegumSigner,
    logWrapper: SPL_NOOP_PROGRAM_ID,
    compressionProgram: SPL_ACCOUNT_COMPRESSION_PROGRAM_ID,
    tokenMetadataProgram: TOKEN_METADATA_PROGRAM_ID,
    bubblegumProgram: BUBBLEGUM_PROGRAM_ID,
    systemProgram: SystemProgram.programId,
  };
}