Rust renderer generates duplicate struct fields when flattening composite account groups with same-named accounts

[Rhovian]

The Rust renderer flattens composite account groups into a single struct without handling duplicate account names, resulting in compilation errors.

{
  "name": "withdraw",
  "accounts": [
    {
      "name": "withdrawFromAvailable",
      "accounts": [
        { "name": "vaultState", ... },
        { "name": "eventAuthority", ... },
        { "name": "program", ... }
      ]
    },
    {
      "name": "withdrawFromReserveAccounts",
      "accounts": [
        { "name": "vaultState", ... }
      ]
    },
    { "name": "eventAuthority", ... },
    { "name": "program", ... }
  ]
}

generates:

pub struct Withdraw {
    pub vault_state: Pubkey,        // from withdrawFromAvailable
    pub event_authority: Pubkey,    // from withdrawFromAvailable
    pub program: Pubkey,            // from withdrawFromAvailable
    pub vault_state: Pubkey,        // DUPLICATE - from withdrawFromReserveAccounts
    pub event_authority: Pubkey,    // DUPLICATE - top level
    pub program: Pubkey,            // DUPLICATE - top level
}

sample IDL from kamino that exhibits this issue:

https://github.com/Kamino-Finance/klend-sdk/blob/master/src/idl/kvault.json

Not seeing any visitor that would help here, but maybe im missing something? expected behaviour would just be field dedup

[lorisleiva]

Hi there, we've actually fixed this recently on the nodes-from-anchor package (See #953). Are you using the latest version of Codama?