diff --git a/distance-oracle/src/api.rs b/distance-oracle/src/api.rs
index 0c08c72658988bb0982eb77d4b1722f10d9868b6..b8d3e9fe07f9b890b04913f1ebc566322e34bdf7 100644
--- a/distance-oracle/src/api.rs
+++ b/distance-oracle/src/api.rs
@@ -14,23 +14,14 @@
 // You should have received a copy of the GNU Affero General Public License
 // along with Duniter-v2S. If not, see <https://www.gnu.org/licenses/>.
 
-use crate::{
-    runtime,
-    runtime::runtime_types::{
-        pallet_distance::median::MedianAcc, sp_arithmetic::per_things::Perbill,
-    },
-};
-use sp_core::bounded::{bounded_btree_set::BoundedBTreeSet, bounded_vec::BoundedVec};
+use crate::runtime;
+
 use sp_core::H256;
 use subxt::storage::StorageKey;
 
 pub type Client = subxt::OnlineClient<crate::RuntimeConfig>;
 pub type AccountId = subxt::ext::sp_runtime::AccountId32;
 pub type IdtyIndex = u32;
-pub type EvaluationPool<AccountId, IdtyIndex> = (
-    BoundedVec<(IdtyIndex, MedianAcc<Perbill>), u32>, // FIXME is u32 still the good type?
-    BoundedBTreeSet<AccountId, u32>,                  // FIXME idem
-);
 
 pub async fn client(rpc_url: String) -> Client {
     Client::from_url(rpc_url)
@@ -63,7 +54,7 @@ pub async fn current_pool(
     client: &Client,
     parent_hash: H256,
     current_session: u32,
-) -> Option<EvaluationPool<AccountId, IdtyIndex>> {
+) -> Option<runtime::runtime_types::pallet_distance::types::EvaluationPool<AccountId, IdtyIndex>> {
     client
         .storage()
         .fetch(
diff --git a/distance-oracle/src/lib.rs b/distance-oracle/src/lib.rs
index eb76d9a3657688e1e06b79c3976a25097f59c4f8..738e43bbcb06c92a87508ea7a1372401e7b406dd 100644
--- a/distance-oracle/src/lib.rs
+++ b/distance-oracle/src/lib.rs
@@ -160,7 +160,7 @@ pub async fn run(
     };
 
     // Stop if nothing to evaluate
-    if evaluation_pool.0 .0.is_empty() {
+    if evaluation_pool.evaluations.0.is_empty() {
         debug!("Nothing to do: Pool is empty");
         return None;
     }
@@ -230,8 +230,8 @@ pub async fn run(
     let referees = members;
 
     let evaluation = evaluation_pool
+        .evaluations
         .0
-         .0
         .as_slice()
         .par_iter()
         .map(|(idty, _)| distance_rule(&received_certs, &referees, settings.max_depth, *idty))
diff --git a/distance-oracle/src/mock.rs b/distance-oracle/src/mock.rs
index 54798d9761965ce4648a0961dcecc0cdbc3fec4b..1ecc7a74c2d91fc36d3b0887c5e47081ffe2e881 100644
--- a/distance-oracle/src/mock.rs
+++ b/distance-oracle/src/mock.rs
@@ -28,8 +28,11 @@ pub struct Client {
 }
 pub type AccountId = subxt::ext::sp_runtime::AccountId32;
 pub type IdtyIndex = u32;
-pub type EvaluationPool<AccountId, IdtyIndex> =
-    ((Vec<(IdtyIndex, MedianAcc<Perbill>)>,), BTreeSet<AccountId>);
+
+pub struct EvaluationPool<AccountId: Ord, IdtyIndex> {
+    pub evaluations: (Vec<(IdtyIndex, MedianAcc<Perbill>)>,),
+    pub evaluators: BTreeSet<AccountId>,
+}
 
 pub async fn client(_rpc_url: String) -> Client {
     unimplemented!()
@@ -52,8 +55,8 @@ pub async fn current_pool(
     _parent_hash: H256,
     _current_session: u32,
 ) -> Option<EvaluationPool<AccountId, IdtyIndex>> {
-    Some((
-        (client
+    Some(EvaluationPool {
+        evaluations: (client
             .wot
             .get_enabled()
             .into_iter()
@@ -65,8 +68,8 @@ pub async fn current_pool(
                 })
             })
             .collect(),),
-        std::collections::BTreeSet::new(),
-    ))
+        evaluators: BTreeSet::new(),
+    })
 }
 
 pub async fn evaluation_block(_client: &Client, _parent_hash: H256) -> H256 {
diff --git a/end2end-tests/tests/cucumber_tests.rs b/end2end-tests/tests/cucumber_tests.rs
index 3eafeb2f4f0ecc86f3bb819360d6593af843fb93..dc30d816a1afde0f0002a85dc34be80ee1f2c5b8 100644
--- a/end2end-tests/tests/cucumber_tests.rs
+++ b/end2end-tests/tests/cucumber_tests.rs
@@ -508,7 +508,7 @@ async fn should_have_distance_result_in_sessions(
         .unwrap()
         .ok_or_else(|| anyhow::anyhow!("given pool is empty"))?;
 
-    for (sample_idty, _) in pool.0 .0 {
+    for (sample_idty, _) in pool.evaluations.0 {
         if sample_idty == idty_id {
             return Ok(());
         }