idl: Fix missing program::seed resolution

[acheroncrypto]

Problem

If seeds gets parsed successfully but program::seed fails to get parsed, the generated account in the IDL has seeds field, but it does not have the program information. I noticed this while answering another related problem in #3471 (comment).

For example:

#[derive(Accounts)]
pub struct Test<'info> {
    #[account(
        seeds = [b"hi"],
        seeds::program = System::id(),
        bump
    )]
    pub pda: UncheckedAccount<'info>,
}

Outputs (incorrectly):

{
  "name": "pda",
  "pda": {
    "seeds": [
      {
        "kind": "const",
        "value": [
          104,
          105
        ]
      }
    ]
  }
}

This is because using external functions (System::id() in this example) is not currently supported (see #2903), which means this is a bug that will lead to incorrect account resolution.

Summary of changes

Fix missing program::seed resolution by changing the logic to the following:

• If both seeds and seeds::program get parsed succcessfuly, include both in the IDL
• If any of them fails to get parsed, skip pda field generation completely.

The above example now outputs (because seeds::program fails to get parsed):

{ "name": "pda" }

This means there will be no error, but the user will need to manually find the address of the pda account.

[vercel]

@acheroncrypto is attempting to deploy a commit to the coral-xyz Team on Vercel.

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