diff --git a/investment_vault/src/lib.rs b/investment_vault/src/lib.rs
index 1f38409..2bbd8c3 100644
--- a/investment_vault/src/lib.rs
+++ b/investment_vault/src/lib.rs
@@ -1179,6 +1179,7 @@ impl InvestmentVault {
             .get(&VaultKey::VolumeTierFeeBps)
             .unwrap_or(0);
         (threshold, bps)
+    }
     // ── Per-project investment cap (#32) ──────────────────────────────────────
 
     /// Set the maximum total USDC the vault may invest in any single project. Admin-only.
diff --git a/investment_vault/src/types.rs b/investment_vault/src/types.rs
index e09392d..4fa1758 100644
--- a/investment_vault/src/types.rs
+++ b/investment_vault/src/types.rs
@@ -90,9 +90,9 @@ pub enum VaultError {
     /// batch_deposit received an empty investor list (#178).
     EmptyBatchDeposit = 41,
     /// Share transfers are blocked because a funding round is active (#38).
-    FundingRoundActive = 41,
+    FundingRoundActive = 42,
     /// Funding would push cumulative investment in a project above its per-project cap (#32).
-    InvestmentCapExceeded = 41,
+    InvestmentCapExceeded = 43,
 }
 
 #[contracttype]
diff --git a/project_registry/src/logic.rs b/project_registry/src/logic.rs
index 2f5de54..8b13789 100644
--- a/project_registry/src/logic.rs
+++ b/project_registry/src/logic.rs
@@ -1,75 +1 @@
-use crate::types::{CertificationStatus, ProjectData};
-use soroban_sdk::{Address, Env, String};
 
-/// Interest-rate calculation for green-bond projects.
-///
-/// Heliobond uses a two-dimensional scoring model to determine each project's
-/// borrowing cost:
-///
-/// # Credit Quality vs Green Impact
-///
-/// | Dimension        | Range  | Purpose |
-/// |----------------- |--------|---------|
-/// | `credit_quality` | 0–100  | Reflects the borrower's ability to repay — backed by on-chain collateral, creator reputation, and certification status. |
-/// | `green_impact`   | 0–100  | Reflects the environmental benefit of the project — verified via oracle data and third-party certification. |
-///
-/// Both scores are 0–100 unsigned integers and are always set and updated
-/// together via `update_impact_score`, or independently via
-/// `update_credit_quality_score`.
-///
-/// # How each score affects the interest rate
-///
-/// The two scores are averaged into a single 0–100 combined value:
-///
-/// ```text
-/// combined_score = (credit_quality + green_impact) / 2   // integer division
-/// ```
-///
-/// This combined score drives the annualised interest rate via the formula:
-///
-/// ```text
-/// discount = combined_score × MAX_DISCOUNT_BPS / 100
-/// rate     = max(BASE_RATE_BPS − discount, 0)
-/// ```
-///
-/// - A project with **both scores at 100** earns the maximum discount
-///   (MAX_DISCOUNT_BPS = 500 bps) and pays the minimum rate (500 bps = 5 %).
-/// - A project with **both scores at 0** pays the base rate (BASE_RATE_BPS =
-///   1 000 bps = 10 %).
-/// - A project with credit_quality = 100 and green_impact = 0 (or vice versa)
-///   earns half the maximum discount (250 bps) and pays 7.5 %.
-///
-/// The averaging means neither score alone can drive the rate to its floor —
-/// a project must excel at both creditworthiness *and* environmental impact to
-/// unlock the lowest borrowing cost.
-///
-/// # How each score affects the funding limit
-///
-/// The `get_creator_funding_limit_bps` function uses `creator reputation`
-/// (a separate 0–100 score set by the admin/whitelister) to cap the fraction
-/// of vault assets a creator's projects may receive. The *credit_quality*
-/// score is **not** used to compute the funding limit — that depends only on
-/// reputation. However, `credit_quality` indirectly affects funding eligibility
-/// through the interest rate: a higher credit quality lowers the rate, making
-/// the project more attractive to vault LPs and therefore more likely to
-/// reach its funding target.
-///
-/// The `green_impact` score has no direct effect on funding limits, but
-/// projects with higher green impact earn lower interest rates, which in turn
-/// makes them more attractive to vault LPs who may choose projects based on
-/// both yield and environmental impact.
-pub fn calculate_interest_rate(
-    base_rate_bps: u32,
-    max_discount_bps: u32,
-    credit_quality: u32,
-    green_impact: u32,
-) -> u32 {
-    let combined_score = (credit_quality + green_impact) / 2;
-    let discount = (combined_score * max_discount_bps) / 100;
-
-    if discount > base_rate_bps {
-        0
-    } else {
-        base_rate_bps - discount
-    }
-}
diff --git a/project_registry/src/storage.rs b/project_registry/src/storage.rs
index 0c7c83d..d2a5e3b 100644
--- a/project_registry/src/storage.rs
+++ b/project_registry/src/storage.rs
@@ -1,26 +1,31 @@
 use crate::types::{DataKey, ProjectData, Proposal};
 use soroban_sdk::{Address, Env};
 
+#[allow(dead_code)]
 pub fn read_project(env: &Env, id: u32) -> Option<ProjectData> {
     env.storage().persistent().get(&DataKey::Project(id))
 }
 
+#[allow(dead_code)]
 pub fn write_project(env: &Env, id: u32, project: &ProjectData) {
     env.storage()
         .persistent()
         .set(&DataKey::Project(id), project);
 }
 
+#[allow(dead_code)]
 pub fn read_proposal(env: &Env, id: u32) -> Option<Proposal> {
     env.storage().persistent().get(&DataKey::Proposal(id))
 }
 
+#[allow(dead_code)]
 pub fn write_proposal(env: &Env, id: u32, proposal: &Proposal) {
     env.storage()
         .persistent()
         .set(&DataKey::Proposal(id), proposal);
 }
 
+#[allow(dead_code)]
 pub fn read_whitelist(env: &Env, account: Address) -> bool {
     env.storage()
         .persistent()
@@ -28,6 +33,7 @@ pub fn read_whitelist(env: &Env, account: Address) -> bool {
         .unwrap_or(false)
 }
 
+#[allow(dead_code)]
 pub fn write_whitelist(env: &Env, account: Address, status: bool) {
     env.storage()
         .persistent()