feat(fees,genesis): FeesApi account-aligned query + 250M Foundation→vault og/gvtry

Dos endurecimientos pre-mainnet (leftovers del remediation roadmap):

1. genesis vault (#16/CHN-4): el preset mainnet asigna el 25% Foundation Treasury
   (250M OGC) al VAULT de governance (og/gvtry, GovernanceTreasuryPalletId), NO a
   una cuenta key-controlada. Es la MISMA cuenta de la que treasury_disbursement
   gasta (gated por governance council) y que emission/staking alimentan → el
   treasury queda DAO-governed desde el bloque 0, materializando "Foundation
   Treasury → DAO governed (CHN-4)". El placeholder FNDT queda SOLO como sudo_key
   interim hasta el sunset (DC ORIGIN_CHAIN_GOVERNANCE_SUNSET_V1). Las allocations
   BM V2 (40/25/15/15/5 = 1B) no cambian de monto.

2. FeesApi alignment: nuevo método query_fee_for_account(action, base, account) que
   estima el fee con el TierProfile REAL on-chain del account (storage TierProfiles,
   ValueQuery default Desktop+Free), NO caller-supplied — alineado con el fee-path
   vivo OriginFeeAdapter (FIX-6 Stage 2a). Cierra el "el cliente adivinaba hw/sub":
   la estimación off-chain ahora usa la misma fórmula sobre el MISMO tier que cobra
   la cadena. Método aditivo al Runtime API ⇒ TRANSACTION_VERSION 1 intacto.

RUNTIME_VERSION 4→5 (nueva metadata de FeesApi). 268 workspace tests verde
(native, SKIP_WASM_BUILD — WASM VPS-gated), 0 regresión. Test sella que
query_fee_for_account usa el perfil real (EmbeddedArm piso < default Desktop).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

crates/origin-chain-runtime/src/genesis_config_presets.rs

@@ -39,7 +39,7 @@
 #![cfg(feature = "std")]
 
 use crate::{
-    configs::{AuraId, GrandpaId},
+    configs::{AuraId, GovernanceTreasuryPalletId, GrandpaId},
     opaque::SessionKeys,
     Balance, ChainAccountId, Ogc, RuntimeGenesisConfig,
 };
@@ -47,6 +47,7 @@ use alloc::vec;
 use alloc::vec::Vec;
 use origin_chain_types::{HardwareTier, SubscriptionTier};
 use sp_genesis_builder::PresetId;
+use sp_runtime::traits::AccountIdConversion;
 
 // ============================================================
 // Canonical constants para mainnet allocation (BM V2)
@@ -343,11 +344,19 @@ pub fn mainnet_genesis_config_genesis() -> RuntimeGenesisConfig {
     };
 
     let ecosystem_pool = make_placeholder(b"ECO!"); // Ecosystem/Rewards Pool canonical
-    let foundation_treasury = make_placeholder(b"FNDT"); // Foundation Treasury canonical
+    let foundation_treasury = make_placeholder(b"FNDT"); // Foundation multisig = sudo_key interim
     let public_sale = make_placeholder(b"SALE"); // Public Sale canonical
     let founding_team = make_placeholder(b"TEAM"); // Founding Team canonical (4yr vesting)
     let exchange_liquidity = make_placeholder(b"LIQD"); // Exchange Liquidity canonical
 
+    // El 25% Foundation Treasury (250M) se asigna al VAULT de governance (og/gvtry),
+    // NO a una cuenta key-controlada — materializa "DAO governed (CHN-4)" desde el
+    // bloque 0. Es la MISMA cuenta de la que `treasury_disbursement` gasta (gated por
+    // governance council) y que emission/staking alimentan. El placeholder FNDT queda
+    // SOLO como sudo_key interim (Root) hasta el sunset a governance pre-mainnet.
+    let governance_vault: ChainAccountId =
+        GovernanceTreasuryPalletId::get().into_account_truncating();
+
     // 5 initial validators canonical Pi 5 placeholders (Dream House Studios + universities).
     let validators = vec![
         placeholder_mainnet_validator(0),
@@ -361,15 +370,16 @@ pub fn mainnet_genesis_config_genesis() -> RuntimeGenesisConfig {
         // BM V2 allocation canonical exact: 40/25/15/15/5 → 1B OGC total
         vec![
             (ecosystem_pool, ECOSYSTEM_ALLOCATION),
-            (foundation_treasury.clone(), FOUNDATION_ALLOCATION),
+            (governance_vault, FOUNDATION_ALLOCATION), // 250M → vault og/gvtry (DAO-governed)
             (public_sale, PUBLIC_SALE_ALLOCATION),
             (founding_team, FOUNDING_TEAM_ALLOCATION),
             (exchange_liquidity, EXCHANGE_LIQUIDITY_ALLOCATION),
         ],
         validators,
-        // FIX-5: Foundation Treasury = sudo key interim (Root) en mainnet
-        // (multisig humano). PRE-LAUNCH Q1 2027: David ratifica la key real +
-        // sunset a governance (pallet-collective/referenda).
+        // FIX-5: el placeholder FNDT (Foundation multisig humano) = sudo key interim
+        // (Root) en mainnet. PRE-LAUNCH Q1 2027: David ratifica la key real + sunset
+        // a governance (pallet-collective/referenda). El treasury (250M) ya NO vive
+        // aquí — está en el vault og/gvtry, gastable solo vía governance.
         foundation_treasury,
         // FIX-6 Stage 2a: mainnet arranca SIN perfiles sembrados — todos en el
         // Default conservador (Desktop+Free) hasta que la attestation real

crates/origin-chain-runtime/src/lib.rs

@@ -233,7 +233,10 @@ pub const IMPL_NAME: &str = "origin-chain-charon";
 /// en pallet-origin-emission Index 13: nuevo call ⇒ cambia metadata. El call es
 /// aditivo en un call_index nuevo — TRANSACTION_VERSION intacto). Palanca Root
 /// para pausar inflación + kill-switch anti-doble-emisión para la activación NPoS.
-pub const RUNTIME_VERSION: u32 = 4;
+/// v5: FeesApi alignment — nuevo método `query_fee_for_account` (estima el fee
+/// con el TierProfile REAL on-chain del account, no caller-supplied). Cambia la
+/// metadata del Runtime API FeesApi; método aditivo ⇒ TRANSACTION_VERSION intacto.
+pub const RUNTIME_VERSION: u32 = 5;
 
 /// Canonical authoring version per Substrate semver canonical.
 pub const AUTHORING_VERSION: u32 = 1;
@@ -660,6 +663,17 @@ impl_runtime_apis! {
         ) -> u64 {
             Fees::query_fee(action, base, hw, sub)
         }
+
+        fn query_fee_for_account(
+            action: origin_chain_types::ChainAction,
+            base: u64,
+            account: origin_chain_types::AccountId,
+        ) -> u64 {
+            // account es el newtype origin_chain_types::AccountId; el storage key
+            // canonical es ChainAccountId = AccountId32 (32-byte, bytes-level).
+            let runtime_account = ChainAccountId::from(account.0);
+            Fees::query_fee_for_account(action, base, &runtime_account)
+        }
     }
 
     // ============================================================
@@ -814,11 +828,11 @@ mod tests {
     use super::*;
 
     #[test]
-    fn runtime_version_v4_emission_kill_switch() {
-        // v4 = FIX-6 Stage 2b governance emission kill-switch (nuevo call en
-        // Emission Index 13). El formato de extrinsic de los calls EXISTENTES NO
-        // cambió (call aditivo en call_index nuevo) ⇒ TRANSACTION_VERSION intacto.
-        assert_eq!(RUNTIME_VERSION, 4);
+    fn runtime_version_v5_fees_api_account_alignment() {
+        // v5 = FeesApi.query_fee_for_account (estima con el TierProfile real
+        // on-chain). Método aditivo al Runtime API ⇒ los calls/extrinsics
+        // EXISTENTES no cambian su formato ⇒ TRANSACTION_VERSION intacto.
+        assert_eq!(RUNTIME_VERSION, 5);
         assert_eq!(TRANSACTION_VERSION, 1);
     }