The @solana/spl-token package contains the getAssociatedTokenAddress function which can be used to obtain the address (public key) of an associated token account. Here's an example:
const programATAPublicKey = await getAssociatedTokenAddress(
mintPublicKey,
programPDAPublicKey,
true,
program.programId
);
I am trying to achieve the same result using the findProgramAddress function from the @project-serum/anchor package. My problem is that I can't figure out which seeds are used inside getAssociatedTokenAddress. For example, I expected the following code to return the associated token account public key:
const [programATAPublicKey] =
await anchor.web3.PublicKey.findProgramAddress(
[mintPublicKey.toBuffer(), programPDAPublicKey.toBuffer()],
program.programId
);
The result is, however, different. Which seed combination would yield an identical result to whatever is returned from getAssociatedTokenAddress?
The best is to use the source! Here's the exact code that generates the associated token account address:
export async function getAssociatedTokenAddress(
mint: PublicKey,
owner: PublicKey,
allowOwnerOffCurve = false,
programId = TOKEN_PROGRAM_ID,
associatedTokenProgramId = ASSOCIATED_TOKEN_PROGRAM_ID
): Promise<PublicKey> {
if (!allowOwnerOffCurve && !PublicKey.isOnCurve(owner.toBuffer())) throw new TokenOwnerOffCurveError();
const [address] = await PublicKey.findProgramAddress(
[owner.toBuffer(), programId.toBuffer(), mint.toBuffer()],
associatedTokenProgramId
);
return address;
}
where ASSOCIATED_TOKEN_PROGRAM_ID is "ATokenGPvbdGVxr1b2hvZbsiqW5xWH25efTNsLJA8knL".