Function compute_shielded_identity_create_fee 

pub fn compute_shielded_identity_create_fee(
    num_actions: usize,
    num_keys: usize,
    platform_version: &PlatformVersion,
) -> Result<Credits, ProtocolError>

Computes the IdentityCreateFromShieldedPool fee (in credits): compute_minimum_shielded_fee PLUS the variable storage cost of the AddNewIdentity write (identity record + balance + revision + N key subtrees), which scales with the number of public keys.

Unlike the flat per-transition components of compute_shielded_unshield_fee / compute_shielded_withdrawal_fee, the identity write grows monotonically with the key count. This is the client-side predictor + the cheap floor the denomination >= min_fee gate uses; the authoritative consensus fee is METERED by GroveDB at execution (the transition’s ExecutionEvent meters its ops and adds only the compute fee via additional_fixed_fee_cost).

Dispatches on the SAME version key (dpp.methods.compute_minimum_shielded_fee) as compute_minimum_shielded_fee so the formulas evolve together across protocol versions.

Parameters

• num_actions — number of Orchard actions in the bundle
• num_keys — number of public keys the new identity is created with
• platform_version — protocol version (determines the formula version and fee constants)