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fix: critical auth bypass, O(1) state optimization and TTL rent management #62

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fix: critical auth bypass, O(1) state optimization and TTL rent management #62

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36 changes: 36 additions & 0 deletions risk_score/Cargo.lock
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4 changes: 4 additions & 0 deletions risk_score/Cargo.toml
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Original file line number Diff line number Diff line change
Expand Up @@ -9,6 +9,10 @@ crate-type = ["cdylib"]
[dependencies]
soroban-sdk = "22.0.8"

[dev-dependencies]
soroban-sdk = { version = "22.0.8", features = ["testutils"] }


[profile.release]
opt-level = "z"
overflow-checks = true
Expand Down
130 changes: 68 additions & 62 deletions risk_score/src/lib.rs
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Expand Up @@ -3,6 +3,10 @@ use soroban_sdk::{contract, contractimpl, contracttype, Address, Env, Map, Symbo

/// Enhanced Risk & Tier Management Contract
/// Stores risk scores with tier classifications and timestamps
///
const DAY_IN_LEDGERS: u32 = 17280;
const BUMP_AMOUNT: u32 = 30 * DAY_IN_LEDGERS;
const LIFETIME_THRESHOLD: u32 = 15 * DAY_IN_LEDGERS;
#[contract]
pub struct RiskTierContract;

Expand Down Expand Up @@ -48,20 +52,35 @@ impl RiskTierContract {
// Use tuple key for better organization: (user, "risk_tier")
let tuple_key = (user.clone(), Symbol::new(&env, "risk_tier"));
env.storage().persistent().set(&tuple_key, &risk_data);
env.storage().persistent().extend_ttl(&tuple_key, LIFETIME_THRESHOLD, BUMP_AMOUNT);

// Also store in tier-based index for efficient queries
let tier_key = (tier.clone(), Symbol::new(&env, "users"));
let mut tier_users: Vec<Address> = env


let user_membership_key = (tier.clone(), Symbol::new(&env, "is_member"), user.clone());
let is_already_member: bool = env
.storage()
.persistent()
.get(&tier_key)
.unwrap_or(Vec::new(&env));
.get(&user_membership_key)
.unwrap_or(false);

// Add user to tier list if not already present
if !tier_users.contains(&user) {
tier_users.push_back(user.clone());
env.storage().persistent().set(&tier_key, &tier_users);

if !is_already_member {

env.storage().persistent().set(&user_membership_key, &true);
env.storage().persistent().extend_ttl(&user_membership_key, LIFETIME_THRESHOLD, BUMP_AMOUNT);


let stats_key = (tier.clone(), Symbol::new(&env, "count"));
let current_count: u32 = env
.storage()
.persistent()
.get(&stats_key)
.unwrap_or(0);

env.storage().persistent().set(&stats_key, &(current_count + 1));
env.storage().persistent().extend_ttl(&stats_key, LIFETIME_THRESHOLD, BUMP_AMOUNT);
}
// --------------------------

// Store user's chosen tier separately for quick access
let chosen_key = (user.clone(), Symbol::new(&env, "chosen_tier"));
Expand All @@ -77,52 +96,51 @@ impl RiskTierContract {
/// Get complete risk and tier data for user
pub fn get_risk_tier(env: Env, user: Address) -> Option<RiskTierData> {
let tuple_key = (user, Symbol::new(&env, "risk_tier"));

if env.storage().persistent().has(&tuple_key) {
env.storage().persistent().extend_ttl(&tuple_key, LIFETIME_THRESHOLD, BUMP_AMOUNT);
}
env.storage().persistent().get(&tuple_key)
}

/// Get only risk score (backward compatibility)
pub fn get_score(env: Env, user: Address) -> u32 {
pub fn get_score(env: Env, user: Address) -> u32 {
let tuple_key = (user, Symbol::new(&env, "risk_tier"));
if let Some(data) = env
.storage()
.persistent()
.get::<_, RiskTierData>(&tuple_key)
{

if let Some(data) = env.storage().persistent().get::<_, RiskTierData>(&tuple_key) {
env.storage().persistent().extend_ttl(&tuple_key, LIFETIME_THRESHOLD, BUMP_AMOUNT);
data.score
} else {
0
}
}

/// Get user's chosen tier for operations
pub fn get_chosen_tier(env: Env, user: Address) -> Symbol {
pub fn get_chosen_tier(env: Env, user: Address) -> Symbol {
let chosen_key = (user, Symbol::new(&env, "chosen_tier"));
if env.storage().persistent().has(&chosen_key) {
env.storage().persistent().extend_ttl(&chosen_key, LIFETIME_THRESHOLD, BUMP_AMOUNT);
}
env.storage()
.persistent()
.get(&chosen_key)
.unwrap_or(Symbol::new(&env, "TIER_3")) // Default to most conservative
.unwrap_or(Symbol::new(&env, "TIER_3"))
}

/// Get all users in a specific tier
pub fn get_tier_users(env: Env, tier: Symbol) -> Vec<Address> {
let tier_key = (tier, Symbol::new(&env, "users"));
env.storage()
.persistent()
.get(&tier_key)
.unwrap_or(Vec::new(&env))
}



pub fn update_chosen_tier(env: Env, user: Address, new_chosen_tier: Symbol) {

user.require_auth();

/// Update user's chosen tier (risk-based validation)
pub fn update_chosen_tier(env: Env, user: Address, new_chosen_tier: Symbol) {
let tuple_key = (user.clone(), Symbol::new(&env, "risk_tier"));

if let Some(mut risk_data) = env
.storage()
.persistent()
.get::<_, RiskTierData>(&tuple_key)
{
// Risk-based tier access control
// High risk users (>70) can only choose TIER_3 for "opportunity" access

if risk_data.score > 70 {
assert!(
new_chosen_tier == Symbol::new(&env, "TIER_3"),
Expand All @@ -131,17 +149,18 @@ impl RiskTierContract {
}

risk_data.chosen_tier = new_chosen_tier.clone();
risk_data.timestamp = env.ledger().timestamp(); // Update timestamp
risk_data.timestamp = env.ledger().timestamp(); // Atualiza o timestamp

env.storage().persistent().set(&tuple_key, &risk_data);

// Update chosen tier cache

let chosen_key = (user.clone(), Symbol::new(&env, "chosen_tier"));
env.storage()
.persistent()
.set(&chosen_key, &new_chosen_tier);
env.storage().persistent().extend_ttl(&tuple_key, LIFETIME_THRESHOLD, BUMP_AMOUNT);

// Emit Event for Indexers

env.events()
.publish((Symbol::new(&env, "tier_updated"), user), new_chosen_tier);
}
Expand All @@ -158,43 +177,42 @@ impl RiskTierContract {
];

for tier in tiers {
let tier_users = Self::get_tier_users(env.clone(), tier.clone());
stats.set(tier, tier_users.len());
let stats_key = (tier.clone(), Symbol::new(&env, "count"));
let count: u32 = env.storage().persistent().get(&stats_key).unwrap_or(0);
stats.set(tier, count);
}

stats
}
}

/// Check if user can access specific tier based on risk score
/// Following Goldfinch/Maple risk-liquidity mapping methodology
pub fn can_access_tier(env: Env, user: Address, target_tier: Symbol) -> bool {
pub fn can_access_tier(env: Env, user: Address, target_tier: Symbol) -> bool {
let tuple_key = (user, Symbol::new(&env, "risk_tier"));

if let Some(risk_data) = env
.storage()
.persistent()
.get::<_, RiskTierData>(&tuple_key)
{
if let Some(risk_data) = env.storage().persistent().get::<_, RiskTierData>(&tuple_key) {
// Explicação: Renova a vida do score do usuário sempre que o acesso a um tier for validado.
env.storage().persistent().extend_ttl(&tuple_key, LIFETIME_THRESHOLD, BUMP_AMOUNT);
let tier_1 = Symbol::new(&env, "TIER_1");
let tier_2 = Symbol::new(&env, "TIER_2");
let tier_3 = Symbol::new(&env, "TIER_3");

match target_tier {
t if t == tier_1 => risk_data.score <= 30, // Low risk only
t if t == tier_2 => risk_data.score <= 70, // Low to medium risk
t if t == tier_3 => true, // All users (with opportunity badge for high risk)
t if t == tier_1 => risk_data.score <= 30,
t if t == tier_2 => risk_data.score <= 70,
t if t == tier_3 => true,
_ => false,
}
} else {
false // No risk data means no access
false
}
}
}

#[cfg(test)]
mod tests {
use super::*;
use soroban_sdk::{testutils::Address as _, Env};
use soroban_sdk::{testutils::Address as _, Address, Env, Symbol};

#[test]
fn test_set_and_get_risk_tier() {
Expand Down Expand Up @@ -325,26 +343,13 @@ mod tests {
assert!(client.can_access_tier(&user, &tier_3));
}

#[test]
fn test_get_tier_users() {
let env = Env::default();
let contract_id = env.register_contract(None, RiskTierContract);
let client = RiskTierContractClient::new(&env, &contract_id);


let user1 = Address::generate(&env);
let user2 = Address::generate(&env);
let tier_1 = Symbol::new(&env, "TIER_1");

client.set_risk_tier(&user1, &20, &tier_1, &tier_1);
client.set_risk_tier(&user2, &25, &tier_1, &tier_1);

let tier_users = client.get_tier_users(&tier_1);
assert_eq!(tier_users.len(), 2);
}

#[test]
fn test_update_chosen_tier_valid() {
let env = Env::default();
env.mock_all_auths();
let contract_id = env.register_contract(None, RiskTierContract);
let client = RiskTierContractClient::new(&env, &contract_id);

Expand All @@ -363,6 +368,7 @@ mod tests {
#[should_panic(expected = "High risk users can only access TIER_3")]
fn test_update_chosen_tier_high_risk_restriction() {
let env = Env::default();
env.mock_all_auths();
let contract_id = env.register_contract(None, RiskTierContract);
let client = RiskTierContractClient::new(&env, &contract_id);

Expand Down
2 changes: 1 addition & 1 deletion risk_score/target/.rustc_info.json
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{"rustc_fingerprint":14548784786673697327,"outputs":{"17747080675513052775":{"success":true,"status":"","code":0,"stdout":"rustc 1.94.1 (e408947bf 2026-03-25)\nbinary: rustc\ncommit-hash: e408947bfd200af42db322daf0fadfe7e26d3bd1\ncommit-date: 2026-03-25\nhost: x86_64-unknown-linux-gnu\nrelease: 1.94.1\nLLVM version: 21.1.8\n","stderr":""},"7971740275564407648":{"success":true,"status":"","code":0,"stdout":"___\nlib___.rlib\nlib___.so\nlib___.so\nlib___.a\nlib___.so\n/home/davicf/.rustup/toolchains/stable-x86_64-unknown-linux-gnu\noff\npacked\nunpacked\n___\ndebug_assertions\npanic=\"unwind\"\nproc_macro\ntarget_abi=\"\"\ntarget_arch=\"x86_64\"\ntarget_endian=\"little\"\ntarget_env=\"gnu\"\ntarget_family=\"unix\"\ntarget_feature=\"fxsr\"\ntarget_feature=\"sse\"\ntarget_feature=\"sse2\"\ntarget_has_atomic=\"16\"\ntarget_has_atomic=\"32\"\ntarget_has_atomic=\"64\"\ntarget_has_atomic=\"8\"\ntarget_has_atomic=\"ptr\"\ntarget_os=\"linux\"\ntarget_pointer_width=\"64\"\ntarget_vendor=\"unknown\"\nunix\n","stderr":""}},"successes":{}}
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