diff --git a/Cargo.lock b/Cargo.lock
index 2c96a6a61..3a1ac833c 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1016,6 +1016,7 @@ dependencies = [
  "chrono 0.4.9 (registry+https://github.com/rust-lang/crates.io-index)",
  "crossbeam-channel 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "env_logger 0.7.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "fst 0.3.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "heed 0.6.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "http 0.1.19 (registry+https://github.com/rust-lang/crates.io-index)",
  "http-service 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
diff --git a/meilisearch-http/Cargo.toml b/meilisearch-http/Cargo.toml
index 7655ac209..61c34b5e7 100644
--- a/meilisearch-http/Cargo.toml
+++ b/meilisearch-http/Cargo.toml
@@ -14,10 +14,12 @@ name = "meilisearch"
 path = "src/main.rs"
 
 [dependencies]
+async-std = { version = "1.0.1", features = ["unstable", "attributes"] }
 bincode = "1.2.0"
 chrono = { version = "0.4.9", features = ["serde"] }
 crossbeam-channel = "0.4.0"
 env_logger = "0.7.1"
+fst = { version = "0.3.5", default-features = false }
 heed = "0.6.1"
 http = "0.1.19"
 indexmap = { version = "1.3.0", features = ["serde-1"] }
@@ -34,11 +36,10 @@ serde_qs = "0.5.1"
 siphasher = "0.3.1"
 structopt = "0.3.3"
 sysinfo = "0.9.5"
+tide = "0.5.1"
 ureq = { version = "0.11.2", features = ["tls"], default-features = false }
 walkdir = "2.2.9"
 whoami = "0.6"
-tide = "0.5.1"
-async-std = { version = "1.0.1", features = ["unstable", "attributes"] }
 
 
 [dev-dependencies]
diff --git a/meilisearch-http/src/error.rs b/meilisearch-http/src/error.rs
index b0f7a1272..220519231 100644
--- a/meilisearch-http/src/error.rs
+++ b/meilisearch-http/src/error.rs
@@ -6,6 +6,8 @@ use serde::{Deserialize, Serialize};
 use tide::IntoResponse;
 use tide::Response;
 
+use crate::helpers::meilisearch::Error as SearchError;
+
 pub type SResult<T> = Result<T, ResponseError>;
 
 pub enum ResponseError {
@@ -122,3 +124,42 @@ fn error(message: String, status: StatusCode) -> Response {
     let message = ErrorMessage { message };
     tide::Response::new(status.as_u16()).body_json(&message).unwrap()
 }
+
+impl From<meilisearch_core::Error> for ResponseError {
+    fn from(err: meilisearch_core::Error) -> ResponseError {
+        ResponseError::internal(err)
+    }
+}
+
+impl From<heed::Error> for ResponseError {
+    fn from(err: heed::Error) -> ResponseError {
+        ResponseError::internal(err)
+    }
+}
+
+impl From<fst::Error> for ResponseError {
+    fn from(err: fst::Error) -> ResponseError {
+        ResponseError::internal(err)
+    }
+}
+
+impl From<SearchError> for ResponseError {
+    fn from(err: SearchError) -> ResponseError {
+        ResponseError::internal(err)
+    }
+}
+
+
+pub trait IntoInternalError<T> {
+    fn into_internal_error(self) -> SResult<T>;
+}
+
+/// Must be used only
+impl <T> IntoInternalError<T> for Option<T> {
+    fn into_internal_error(self) -> SResult<T> {
+        match self {
+            Some(value) => Ok(value),
+            None => Err(ResponseError::internal("Heed "))
+        }
+    }
+}
diff --git a/meilisearch-http/src/helpers/tide.rs b/meilisearch-http/src/helpers/tide.rs
index 23eda399f..b12d05152 100644
--- a/meilisearch-http/src/helpers/tide.rs
+++ b/meilisearch-http/src/helpers/tide.rs
@@ -30,14 +30,13 @@ impl RequestExt for Request<Data> {
         let request_index: Option<String> = None; //self.param::<String>("index").ok();
 
         let db = &self.state().db;
-        let reader = db.main_read_txn().map_err(ResponseError::internal)?;
+        let reader = db.main_read_txn()?;
 
         let token_key = format!("{}{}", TOKEN_PREFIX_KEY, user_api_key);
 
         let token_config = db
             .common_store()
-            .get::<_, Str, SerdeBincode<Token>>(&reader, &token_key)
-            .map_err(ResponseError::internal)?
+            .get::<_, Str, SerdeBincode<Token>>(&reader, &token_key)?
             .ok_or(ResponseError::invalid_token(format!(
                 "Api key does not exist: {}",
                 user_api_key
diff --git a/meilisearch-http/src/routes/document.rs b/meilisearch-http/src/routes/document.rs
index fb9eaf681..b6cf005da 100644
--- a/meilisearch-http/src/routes/document.rs
+++ b/meilisearch-http/src/routes/document.rs
@@ -21,11 +21,10 @@ pub async fn get_document(ctx: Request<Data>) -> SResult<Response> {
     let document_id = meilisearch_core::serde::compute_document_id(identifier.clone());
 
     let db = &ctx.state().db;
-    let reader = db.main_read_txn().map_err(ResponseError::internal)?;
+    let reader = db.main_read_txn()?;
 
     let response = index
-        .document::<IndexMap<String, Value>>(&reader, None, document_id)
-        .map_err(ResponseError::internal)?
+        .document::<IndexMap<String, Value>>(&reader, None, document_id)?
         .ok_or(ResponseError::document_not_found(&identifier))?;
 
     if response.is_empty() {
@@ -47,17 +46,13 @@ pub async fn delete_document(ctx: Request<Data>) -> SResult<Response> {
     let index = ctx.index()?;
     let identifier = ctx.identifier()?;
     let document_id = meilisearch_core::serde::compute_document_id(identifier.clone());
-
     let db = &ctx.state().db;
-    let mut update_writer = db.update_write_txn().map_err(ResponseError::internal)?;
-
+    let mut update_writer = db.update_write_txn()?;
     let mut documents_deletion = index.documents_deletion();
     documents_deletion.delete_document_by_id(document_id);
-    let update_id = documents_deletion
-        .finalize(&mut update_writer)
-        .map_err(ResponseError::internal)?;
+    let update_id = documents_deletion.finalize(&mut update_writer)?;
 
-    update_writer.commit().map_err(ResponseError::internal)?;
+    update_writer.commit()?;
 
     let response_body = IndexUpdateResponse { update_id };
     Ok(tide::Response::new(202).body_json(&response_body).unwrap())
@@ -81,13 +76,11 @@ pub async fn get_all_documents(ctx: Request<Data>) -> SResult<Response> {
     let limit = query.limit.unwrap_or(20);
 
     let db = &ctx.state().db;
-    let reader = db.main_read_txn().map_err(ResponseError::internal)?;
+    let reader = db.main_read_txn()?;
 
-    let documents_ids: Result<BTreeSet<_>, _> =
-        match index.documents_fields_counts.documents_ids(&reader) {
-            Ok(documents_ids) => documents_ids.skip(offset).take(limit).collect(),
-            Err(e) => return Err(ResponseError::internal(e)),
-        };
+    let documents_ids: Result<BTreeSet<_>, _> = index.documents_fields_counts
+        .documents_ids(&reader)?
+        .skip(offset).take(limit).collect();
 
     let documents_ids = match documents_ids {
         Ok(documents_ids) => documents_ids,
@@ -139,13 +132,9 @@ async fn update_multiple_documents(mut ctx: Request<Data>, is_partial: bool) ->
     let query: UpdateDocumentsQuery = ctx.query().unwrap_or_default();
 
     let db = &ctx.state().db;
-    let reader = db.main_read_txn().map_err(ResponseError::internal)?;
-    let mut update_writer = db.update_write_txn().map_err(ResponseError::internal)?;
-
-    let current_schema = index
-        .main
-        .schema(&reader)
-        .map_err(ResponseError::internal)?;
+    let reader = db.main_read_txn()?;
+    let mut update_writer = db.update_write_txn()?;
+    let current_schema = index.main.schema(&reader)?;
     if current_schema.is_none() {
         let id = match query.identifier {
             Some(id) => id,
@@ -160,9 +149,7 @@ async fn update_multiple_documents(mut ctx: Request<Data>, is_partial: bool) ->
             attribute_identifier: Some(id),
             ..Settings::default()
         };
-        index
-            .settings_update(&mut update_writer, settings.into())
-            .map_err(ResponseError::internal)?;
+        index.settings_update(&mut update_writer, settings.into())?;
     }
 
     let mut document_addition = if is_partial {
@@ -175,11 +162,8 @@ async fn update_multiple_documents(mut ctx: Request<Data>, is_partial: bool) ->
         document_addition.update_document(document);
     }
 
-    let update_id = document_addition
-        .finalize(&mut update_writer)
-        .map_err(ResponseError::internal)?;
-
-    update_writer.commit().map_err(ResponseError::internal)?;
+    let update_id = document_addition.finalize(&mut update_writer)?;
+    update_writer.commit()?;
 
     let response_body = IndexUpdateResponse { update_id };
     Ok(tide::Response::new(202).body_json(&response_body).unwrap())
@@ -200,7 +184,7 @@ pub async fn delete_multiple_documents(mut ctx: Request<Data>) -> SResult<Respon
     let index = ctx.index()?;
 
     let db = &ctx.state().db;
-    let mut writer = db.update_write_txn().map_err(ResponseError::internal)?;
+    let mut writer = db.update_write_txn()?;
 
     let mut documents_deletion = index.documents_deletion();
 
@@ -211,11 +195,9 @@ pub async fn delete_multiple_documents(mut ctx: Request<Data>) -> SResult<Respon
         }
     }
 
-    let update_id = documents_deletion
-        .finalize(&mut writer)
-        .map_err(ResponseError::internal)?;
+    let update_id = documents_deletion.finalize(&mut writer)?;
 
-    writer.commit().map_err(ResponseError::internal)?;
+    writer.commit()?;
 
     let response_body = IndexUpdateResponse { update_id };
     Ok(tide::Response::new(202).body_json(&response_body).unwrap())
@@ -227,12 +209,10 @@ pub async fn clear_all_documents(ctx: Request<Data>) -> SResult<Response> {
     let index = ctx.index()?;
 
     let db = &ctx.state().db;
-    let mut writer = db.update_write_txn().map_err(ResponseError::internal)?;
+    let mut writer = db.update_write_txn()?;
 
-    let update_id = index
-        .clear_all(&mut writer)
-        .map_err(ResponseError::internal)?;
-    writer.commit().map_err(ResponseError::internal)?;
+    let update_id = index.clear_all(&mut writer)?;
+    writer.commit()?;
 
     let response_body = IndexUpdateResponse { update_id };
     Ok(tide::Response::new(202).body_json(&response_body).unwrap())
diff --git a/meilisearch-http/src/routes/health.rs b/meilisearch-http/src/routes/health.rs
index dae4fa17f..7b361c30f 100644
--- a/meilisearch-http/src/routes/health.rs
+++ b/meilisearch-http/src/routes/health.rs
@@ -11,7 +11,7 @@ const UNHEALTHY_KEY: &str = "_is_unhealthy";
 
 pub async fn get_health(ctx: Request<Data>) -> SResult<Response> {
     let db = &ctx.state().db;
-    let reader = db.main_read_txn().map_err(ResponseError::internal)?;
+    let reader = db.main_read_txn()?;
 
     let common_store = ctx.state().db.common_store();
 
@@ -24,38 +24,22 @@ pub async fn get_health(ctx: Request<Data>) -> SResult<Response> {
 
 pub async fn set_healthy(ctx: Request<Data>) -> SResult<Response> {
     ctx.is_allowed(Admin)?;
-
     let db = &ctx.state().db;
-    let mut writer = db.main_write_txn().map_err(ResponseError::internal)?;
-
+    let mut writer = db.main_write_txn()?;
     let common_store = ctx.state().db.common_store();
-    match common_store.delete::<_, Str>(&mut writer, UNHEALTHY_KEY) {
-        Ok(_) => (),
-        Err(e) => return Err(ResponseError::internal(e)),
-    }
-
-    if let Err(e) = writer.commit() {
-        return Err(ResponseError::internal(e));
-    }
+    common_store.delete::<_, Str>(&mut writer, UNHEALTHY_KEY)?;
+    writer.commit()?;
 
     Ok(tide::Response::new(200))
 }
 
 pub async fn set_unhealthy(ctx: Request<Data>) -> SResult<Response> {
     ctx.is_allowed(Admin)?;
-
     let db = &ctx.state().db;
-    let mut writer = db.main_write_txn().map_err(ResponseError::internal)?;
-
+    let mut writer = db.main_write_txn()?;
     let common_store = ctx.state().db.common_store();
-
-    if let Err(e) = common_store.put::<_, Str, Unit>(&mut writer, UNHEALTHY_KEY, &()) {
-        return Err(ResponseError::internal(e));
-    }
-
-    if let Err(e) = writer.commit() {
-        return Err(ResponseError::internal(e));
-    }
+    common_store.put::<_, Str, Unit>(&mut writer, UNHEALTHY_KEY, &())?;
+    writer.commit()?;
 
     Ok(tide::Response::new(200))
 }
diff --git a/meilisearch-http/src/routes/index.rs b/meilisearch-http/src/routes/index.rs
index 537496054..000c122de 100644
--- a/meilisearch-http/src/routes/index.rs
+++ b/meilisearch-http/src/routes/index.rs
@@ -6,7 +6,7 @@ use serde::{Deserialize, Serialize};
 use serde_json::json;
 use tide::{Request, Response};
 
-use crate::error::{ResponseError, SResult};
+use crate::error::{ResponseError, SResult, IntoInternalError};
 use crate::helpers::tide::RequestExt;
 use crate::models::token::ACL::*;
 use crate::Data;
@@ -26,7 +26,7 @@ pub async fn list_indexes(ctx: Request<Data>) -> SResult<Response> {
     let indexes_uids = ctx.state().db.indexes_uids();
 
     let db = &ctx.state().db;
-    let reader = db.main_read_txn().map_err(ResponseError::internal)?;
+    let reader = db.main_read_txn()?;
 
     let mut response_body = Vec::new();
 
@@ -35,21 +35,9 @@ pub async fn list_indexes(ctx: Request<Data>) -> SResult<Response> {
 
         match index {
             Some(index) => {
-                let name = index
-                    .main
-                    .name(&reader)
-                    .map_err(ResponseError::internal)?
-                    .ok_or(ResponseError::internal("'name' not found"))?;
-                let created_at = index
-                    .main
-                    .created_at(&reader)
-                    .map_err(ResponseError::internal)?
-                    .ok_or(ResponseError::internal("'created_at' date not found"))?;
-                let updated_at = index
-                    .main
-                    .updated_at(&reader)
-                    .map_err(ResponseError::internal)?
-                    .ok_or(ResponseError::internal("'updated_at' date not found"))?;
+                let name = index.main.name(&reader)?.into_internal_error()?;
+                let created_at = index.main.created_at(&reader)?.into_internal_error()?;
+                let updated_at = index.main.updated_at(&reader)?.into_internal_error()?;
 
                 let index_response = IndexResponse {
                     name,
@@ -84,24 +72,12 @@ pub async fn get_index(ctx: Request<Data>) -> SResult<Response> {
     let index = ctx.index()?;
 
     let db = &ctx.state().db;
-    let reader = db.main_read_txn().map_err(ResponseError::internal)?;
+    let reader = db.main_read_txn()?;
 
     let uid = ctx.url_param("index")?;
-    let name = index
-        .main
-        .name(&reader)
-        .map_err(ResponseError::internal)?
-        .ok_or(ResponseError::internal("'name' not found"))?;
-    let created_at = index
-        .main
-        .created_at(&reader)
-        .map_err(ResponseError::internal)?
-        .ok_or(ResponseError::internal("'created_at' date not found"))?;
-    let updated_at = index
-        .main
-        .updated_at(&reader)
-        .map_err(ResponseError::internal)?
-        .ok_or(ResponseError::internal("'updated_at' date not found"))?;
+    let name = index.main.name(&reader)?.into_internal_error()?;
+    let created_at = index.main.created_at(&reader)?.into_internal_error()?;
+    let updated_at = index.main.updated_at(&reader)?.into_internal_error()?;
 
     let response_body = IndexResponse {
         name,
@@ -158,24 +134,13 @@ pub async fn create_index(mut ctx: Request<Data>) -> SResult<Response> {
         Err(e) => return Err(ResponseError::create_index(e)),
     };
 
-    let mut writer = db.main_write_txn().map_err(ResponseError::internal)?;
-
+    let mut writer = db.main_write_txn()?;
     let name = body.name.unwrap_or(uid.clone());
+    created_index.main.put_name(&mut writer, &name)?;
+    let created_at = created_index.main.created_at(&writer)?.into_internal_error()?;
+    let updated_at = created_index.main.updated_at(&writer)?.into_internal_error()?;
 
-    created_index.main
-        .put_name(&mut writer, &name)
-        .map_err(ResponseError::internal)?;
-
-    let created_at = created_index.main
-        .created_at(&writer)
-        .map_err(ResponseError::internal)?
-        .unwrap_or(Utc::now());
-    let updated_at = created_index.main
-        .updated_at(&writer)
-        .map_err(ResponseError::internal)?
-        .unwrap_or(Utc::now());
-
-    writer.commit().map_err(ResponseError::internal)?;
+    writer.commit()?;
 
     let response_body = IndexCreateResponse {
         name: name,
@@ -214,31 +179,17 @@ pub async fn update_index(mut ctx: Request<Data>) -> SResult<Response> {
     let index = ctx.index()?;
 
     let db = &ctx.state().db;
-    let mut writer = db.main_write_txn().map_err(ResponseError::internal)?;
+    let mut writer = db.main_write_txn()?;
 
-    index
-        .main
-        .put_name(&mut writer, &body.name)
-        .map_err(ResponseError::internal)?;
+    index.main.put_name(&mut writer, &body.name)?;
 
-    index
-        .main
-        .put_updated_at(&mut writer)
-        .map_err(ResponseError::internal)?;
+    index.main.put_updated_at(&mut writer)?;
 
-    writer.commit().map_err(ResponseError::internal)?;
-    let reader = db.main_read_txn().map_err(ResponseError::internal)?;
+    writer.commit()?;
+    let reader = db.main_read_txn()?;
 
-    let created_at = index
-        .main
-        .created_at(&reader)
-        .map_err(ResponseError::internal)?
-        .ok_or(ResponseError::internal("'created_at' date not found"))?;
-    let updated_at = index
-        .main
-        .updated_at(&reader)
-        .map_err(ResponseError::internal)?
-        .ok_or(ResponseError::internal("'updated_at' date not found"))?;
+    let created_at = index.main.created_at(&reader)?.into_internal_error()?;
+    let updated_at = index.main.updated_at(&reader)?.into_internal_error()?;
 
     let response_body = UpdateIndexResponse {
         name: body.name,
@@ -254,16 +205,14 @@ pub async fn get_update_status(ctx: Request<Data>) -> SResult<Response> {
     ctx.is_allowed(IndexesRead)?;
 
     let db = &ctx.state().db;
-    let reader = db.update_read_txn().map_err(ResponseError::internal)?;
+    let reader = db.update_read_txn()?;
 
     let update_id = ctx
         .param::<u64>("update_id")
         .map_err(|e| ResponseError::bad_parameter("update_id", e))?;
 
     let index = ctx.index()?;
-    let status = index
-        .update_status(&reader, update_id)
-        .map_err(ResponseError::internal)?;
+    let status = index.update_status(&reader, update_id)?;
 
     let response = match status {
         Some(status) => tide::Response::new(200).body_json(&status).unwrap(),
@@ -275,15 +224,10 @@ pub async fn get_update_status(ctx: Request<Data>) -> SResult<Response> {
 
 pub async fn get_all_updates_status(ctx: Request<Data>) -> SResult<Response> {
     ctx.is_allowed(IndexesRead)?;
-
     let db = &ctx.state().db;
-    let reader = db.update_read_txn().map_err(ResponseError::internal)?;
-
+    let reader = db.update_read_txn()?;
     let index = ctx.index()?;
-    let response = index
-        .all_updates_status(&reader)
-        .map_err(ResponseError::internal)?;
-
+    let response = index.all_updates_status(&reader)?;
     Ok(tide::Response::new(200).body_json(&response).unwrap())
 }
 
@@ -291,7 +235,7 @@ pub async fn delete_index(ctx: Request<Data>) -> SResult<Response> {
     ctx.is_allowed(IndexesWrite)?;
     let _ = ctx.index()?;
     let index_uid = ctx.url_param("index")?;
-    ctx.state().db.delete_index(&index_uid).map_err(ResponseError::internal)?;
+    ctx.state().db.delete_index(&index_uid)?;
     Ok(tide::Response::new(204))
 }
 
diff --git a/meilisearch-http/src/routes/key.rs b/meilisearch-http/src/routes/key.rs
index 693674bd1..fea422696 100644
--- a/meilisearch-http/src/routes/key.rs
+++ b/meilisearch-http/src/routes/key.rs
@@ -24,18 +24,17 @@ pub async fn list(ctx: Request<Data>) -> SResult<Response> {
     ctx.is_allowed(Admin)?;
 
     let db = &ctx.state().db;
-    let reader = db.main_read_txn().map_err(ResponseError::internal)?;
+    let reader = db.main_read_txn()?;
 
     let common_store = db.common_store();
 
     let mut response: Vec<Token> = Vec::new();
 
     let iter = common_store
-        .prefix_iter::<_, Str, SerdeBincode<Token>>(&reader, TOKEN_PREFIX_KEY)
-        .map_err(ResponseError::internal)?;
+        .prefix_iter::<_, Str, SerdeBincode<Token>>(&reader, TOKEN_PREFIX_KEY)?;
 
     for result in iter {
-        let (_, token) = result.map_err(ResponseError::internal)?;
+        let (_, token) = result?;
         response.push(token);
     }
 
@@ -47,14 +46,13 @@ pub async fn get(ctx: Request<Data>) -> SResult<Response> {
     let request_key = ctx.url_param("key")?;
 
     let db = &ctx.state().db;
-    let reader = db.main_read_txn().map_err(ResponseError::internal)?;
+    let reader = db.main_read_txn()?;
 
     let token_key = format!("{}{}", TOKEN_PREFIX_KEY, request_key);
 
     let token_config = db
         .common_store()
-        .get::<_, Str, SerdeBincode<Token>>(&reader, &token_key)
-        .map_err(ResponseError::internal)?
+        .get::<_, Str, SerdeBincode<Token>>(&reader, &token_key)?
         .ok_or(ResponseError::not_found(format!(
             "token key: {}",
             token_key
@@ -93,14 +91,11 @@ pub async fn create(mut ctx: Request<Data>) -> SResult<Response> {
     };
 
     let db = &ctx.state().db;
-    let mut writer = db.main_write_txn().map_err(ResponseError::internal)?;
+    let mut writer = db.main_write_txn()?;
 
-    db.common_store()
-        .put::<_, Str, SerdeBincode<Token>>(&mut writer, &token_key, &token_definition)
-        .map_err(ResponseError::internal)?;
-
-    writer.commit().map_err(ResponseError::internal)?;
+    db.common_store().put::<_, Str, SerdeBincode<Token>>(&mut writer, &token_key, &token_definition)?;
 
+    writer.commit()?;
     Ok(tide::Response::new(201).body_json(&token_definition).unwrap())
 }
 
@@ -121,15 +116,14 @@ pub async fn update(mut ctx: Request<Data>) -> SResult<Response> {
     let data: UpdatedRequest = ctx.body_json().await.map_err(ResponseError::bad_request)?;
 
     let db = &ctx.state().db;
-    let mut writer = db.main_write_txn().map_err(ResponseError::internal)?;
+    let mut writer = db.main_write_txn()?;
 
     let common_store = db.common_store();
 
     let token_key = format!("{}{}", TOKEN_PREFIX_KEY, request_key);
 
     let mut token_config = common_store
-        .get::<_, Str, SerdeBincode<Token>>(&writer, &token_key)
-        .map_err(ResponseError::internal)?
+        .get::<_, Str, SerdeBincode<Token>>(&writer, &token_key)?
         .ok_or(ResponseError::not_found(format!(
             "token key: {}",
             token_key
@@ -139,30 +133,22 @@ pub async fn update(mut ctx: Request<Data>) -> SResult<Response> {
     if let Some(description) = data.description {
         token_config.description = description;
     }
-
     if let Some(acl) = data.acl {
         token_config.acl = acl;
     }
-
     if let Some(indexes) = data.indexes {
         token_config.indexes = indexes;
     }
-
     if let Some(expires_at) = data.expires_at {
         token_config.expires_at = expires_at;
     }
-
     if let Some(revoked) = data.revoked {
         token_config.revoked = revoked;
     }
 
     token_config.updated_at = Utc::now();
-
-    common_store
-        .put::<_, Str, SerdeBincode<Token>>(&mut writer, &token_key, &token_config)
-        .map_err(ResponseError::internal)?;
-
-    writer.commit().map_err(ResponseError::internal)?;
+    common_store.put::<_, Str, SerdeBincode<Token>>(&mut writer, &token_key, &token_config)?;
+    writer.commit()?;
 
     Ok(tide::Response::new(200).body_json(&token_config).unwrap())
 }
@@ -170,19 +156,11 @@ pub async fn update(mut ctx: Request<Data>) -> SResult<Response> {
 pub async fn delete(ctx: Request<Data>) -> SResult<Response> {
     ctx.is_allowed(Admin)?;
     let request_key = ctx.url_param("key")?;
-
     let db = &ctx.state().db;
-    let mut writer = db.main_write_txn().map_err(ResponseError::internal)?;
-
+    let mut writer = db.main_write_txn()?;
     let common_store = db.common_store();
-
     let token_key = format!("{}{}", TOKEN_PREFIX_KEY, request_key);
-
-    common_store
-        .delete::<_, Str>(&mut writer, &token_key)
-        .map_err(ResponseError::internal)?;
-
-    writer.commit().map_err(ResponseError::internal)?;
-
+    common_store.delete::<_, Str>(&mut writer, &token_key)?;
+    writer.commit()?;
     Ok(tide::Response::new(204))
 }
diff --git a/meilisearch-http/src/routes/search.rs b/meilisearch-http/src/routes/search.rs
index ebf0e5974..d52497f77 100644
--- a/meilisearch-http/src/routes/search.rs
+++ b/meilisearch-http/src/routes/search.rs
@@ -32,12 +32,9 @@ pub async fn search_with_url_query(ctx: Request<Data>) -> SResult<Response> {
 
     let index = ctx.index()?;
     let db = &ctx.state().db;
-    let reader = db.main_read_txn().map_err(ResponseError::internal)?;
+    let reader = db.main_read_txn()?;
 
-    let schema = index
-        .main
-        .schema(&reader)
-        .map_err(ResponseError::internal)?
+    let schema = index.main.schema(&reader)?
         .ok_or(ResponseError::open_index("No Schema found"))?;
 
     let query: SearchQuery = ctx.query()
@@ -201,10 +198,8 @@ pub async fn search_multi_index(mut ctx: Request<Data>) -> SResult<Response> {
                 }
             }
 
-            let reader = db.main_read_txn().map_err(ResponseError::internal)?;
-            let response = search_builder
-                .search(&reader)
-                .map_err(ResponseError::internal)?;
+            let reader = db.main_read_txn()?;
+            let response = search_builder.search(&reader)?;
             Ok((index_uid, response))
         })
         .collect();
diff --git a/meilisearch-http/src/routes/setting.rs b/meilisearch-http/src/routes/setting.rs
index 79a2b799d..42ccc688d 100644
--- a/meilisearch-http/src/routes/setting.rs
+++ b/meilisearch-http/src/routes/setting.rs
@@ -29,7 +29,7 @@ pub async fn get(ctx: Request<Data>) -> SResult<Response> {
     let index = ctx.index()?;
 
     let db = &ctx.state().db;
-    let reader = db.main_read_txn().map_err(ResponseError::internal)?;
+    let reader = db.main_read_txn()?;
 
     let settings = match index.main.customs(&reader).unwrap() {
         Some(bytes) => bincode::deserialize(bytes).unwrap(),
@@ -64,8 +64,8 @@ pub async fn update(mut ctx: Request<Data>) -> SResult<Response> {
     let index = ctx.index()?;
 
     let db = &ctx.state().db;
-    let reader = db.main_read_txn().map_err(ResponseError::internal)?;
-    let mut writer = db.update_write_txn().map_err(ResponseError::internal)?;
+    let reader = db.main_read_txn()?;
+    let mut writer = db.update_write_txn()?;
 
     let mut current_settings = match index.main.customs(&reader).unwrap() {
         Some(bytes) => bincode::deserialize(bytes).unwrap(),
@@ -82,11 +82,9 @@ pub async fn update(mut ctx: Request<Data>) -> SResult<Response> {
 
     let bytes = bincode::serialize(&current_settings).unwrap();
 
-    let update_id = index
-        .customs_update(&mut writer, bytes)
-        .map_err(ResponseError::internal)?;
+    let update_id = index.customs_update(&mut writer, bytes)?;
 
-    writer.commit().map_err(ResponseError::internal)?;
+    writer.commit()?;
 
     let response_body = IndexUpdateResponse { update_id };
     Ok(tide::Response::new(202).body_json(&response_body).unwrap())
diff --git a/meilisearch-http/src/routes/stats.rs b/meilisearch-http/src/routes/stats.rs
index f0eac878a..715217031 100644
--- a/meilisearch-http/src/routes/stats.rs
+++ b/meilisearch-http/src/routes/stats.rs
@@ -8,7 +8,7 @@ use sysinfo::{NetworkExt, Pid, ProcessExt, ProcessorExt, System, SystemExt};
 use tide::{Request, Response};
 use walkdir::WalkDir;
 
-use crate::error::{ResponseError, SResult};
+use crate::error::{SResult, IntoInternalError};
 use crate::helpers::tide::RequestExt;
 use crate::models::token::ACL::*;
 use crate::Data;
@@ -25,27 +25,12 @@ pub async fn index_stat(ctx: Request<Data>) -> SResult<Response> {
     ctx.is_allowed(Admin)?;
     let index_uid = ctx.url_param("index")?;
     let index = ctx.index()?;
-
     let db = &ctx.state().db;
-    let reader = db.main_read_txn().map_err(ResponseError::internal)?;
-    let update_reader = db.update_read_txn().map_err(ResponseError::internal)?;
-
-    let number_of_documents = index
-        .main
-        .number_of_documents(&reader)
-        .map_err(ResponseError::internal)?;
-
-    let fields_frequency = index
-        .main
-        .fields_frequency(&reader)
-        .map_err(ResponseError::internal)?
-        .unwrap_or_default();
-
-    let is_indexing = ctx
-        .state()
-        .is_indexing(&update_reader, &index_uid)
-        .map_err(ResponseError::internal)?
-        .ok_or(ResponseError::internal("'is_indexing' date not found"))?;
+    let reader = db.main_read_txn()?;
+    let update_reader = db.update_read_txn()?;
+    let number_of_documents = index.main.number_of_documents(&reader)?;
+    let fields_frequency = index.main.fields_frequency(&reader)?.unwrap_or_default();
+    let is_indexing = ctx.state().is_indexing(&update_reader, &index_uid)?.into_internal_error()?;
 
     let response = IndexStatsResponse {
         number_of_documents,
@@ -69,8 +54,8 @@ pub async fn get_stats(ctx: Request<Data>) -> SResult<Response> {
     let mut index_list = HashMap::new();
 
     let db = &ctx.state().db;
-    let reader = db.main_read_txn().map_err(ResponseError::internal)?;
-    let update_reader = db.update_read_txn().map_err(ResponseError::internal)?;
+    let reader = db.main_read_txn()?;
+    let update_reader = db.update_read_txn()?;
 
     let indexes_set = ctx.state().db.indexes_uids();
     for index_uid in indexes_set {
@@ -78,22 +63,14 @@ pub async fn get_stats(ctx: Request<Data>) -> SResult<Response> {
 
         match index {
             Some(index) => {
-                let number_of_documents = index
-                    .main
-                    .number_of_documents(&reader)
-                    .map_err(ResponseError::internal)?;
+                let number_of_documents = index.main.number_of_documents(&reader)?;
 
-                let fields_frequency = index
-                    .main
-                    .fields_frequency(&reader)
-                    .map_err(ResponseError::internal)?
-                    .unwrap_or_default();
+                let fields_frequency = index.main.fields_frequency(&reader)?.unwrap_or_default();
 
                 let is_indexing = ctx
                     .state()
-                    .is_indexing(&update_reader, &index_uid)
-                    .map_err(ResponseError::internal)?
-                    .ok_or(ResponseError::internal("'is_indexing' date not found"))?;
+                    .is_indexing(&update_reader, &index_uid)?
+                    .into_internal_error()?;
 
                 let response = IndexStatsResponse {
                     number_of_documents,
@@ -116,10 +93,7 @@ pub async fn get_stats(ctx: Request<Data>) -> SResult<Response> {
         .filter(|metadata| metadata.is_file())
         .fold(0, |acc, m| acc + m.len());
 
-    let last_update = ctx
-        .state()
-        .last_update(&reader)
-        .map_err(ResponseError::internal)?;
+    let last_update = ctx.state().last_update(&reader)?;
 
     let response = StatsResult {
         database_size,
diff --git a/meilisearch-http/src/routes/stop_words.rs b/meilisearch-http/src/routes/stop_words.rs
index 8cc4f6ce1..fc21d61ef 100644
--- a/meilisearch-http/src/routes/stop_words.rs
+++ b/meilisearch-http/src/routes/stop_words.rs
@@ -12,20 +12,10 @@ use crate::Data;
 pub async fn get(ctx: Request<Data>) -> SResult<Response> {
     ctx.is_allowed(SettingsRead)?;
     let index = ctx.index()?;
-
     let db = &ctx.state().db;
-    let reader = db.main_read_txn().map_err(ResponseError::internal)?;
-
-    let stop_words_fst = index
-        .main
-        .stop_words_fst(&reader)
-        .map_err(ResponseError::internal)?;
-
-    let stop_words = stop_words_fst
-        .unwrap_or_default()
-        .stream()
-        .into_strs()
-        .map_err(ResponseError::internal)?;
+    let reader = db.main_read_txn()?;
+    let stop_words_fst = index.main.stop_words_fst(&reader)?;
+    let stop_words = stop_words_fst.unwrap_or_default().stream().into_strs()?;
 
     Ok(tide::Response::new(200).body_json(&stop_words).unwrap())
 }
@@ -37,17 +27,16 @@ pub async fn update(mut ctx: Request<Data>) -> SResult<Response> {
     let data: BTreeSet<String> = ctx.body_json().await.map_err(ResponseError::bad_request)?;
 
     let db = &ctx.state().db;
-    let mut writer = db.update_write_txn().map_err(ResponseError::internal)?;
+    let mut writer = db.update_write_txn()?;
 
     let settings = SettingsUpdate {
         stop_words: UpdateState::Update(data),
         .. SettingsUpdate::default()
     };
 
-    let update_id = index.settings_update(&mut writer, settings)
-        .map_err(ResponseError::internal)?;
+    let update_id = index.settings_update(&mut writer, settings)?;
 
-    writer.commit().map_err(ResponseError::internal)?;
+    writer.commit()?;
 
     let response_body = IndexUpdateResponse { update_id };
     Ok(tide::Response::new(202).body_json(&response_body).unwrap())
@@ -58,17 +47,16 @@ pub async fn delete(ctx: Request<Data>) -> SResult<Response> {
     let index = ctx.index()?;
 
     let db = &ctx.state().db;
-    let mut writer = db.update_write_txn().map_err(ResponseError::internal)?;
+    let mut writer = db.update_write_txn()?;
 
     let settings = SettingsUpdate {
         stop_words: UpdateState::Clear,
         .. SettingsUpdate::default()
     };
 
-    let update_id = index.settings_update(&mut writer, settings)
-        .map_err(ResponseError::internal)?;
+    let update_id = index.settings_update(&mut writer, settings)?;
 
-    writer.commit().map_err(ResponseError::internal)?;
+    writer.commit()?;
 
     let response_body = IndexUpdateResponse { update_id };
     Ok(tide::Response::new(202).body_json(&response_body).unwrap())
diff --git a/meilisearch-http/src/routes/synonym.rs b/meilisearch-http/src/routes/synonym.rs
index 9ee0f5b99..a287a4962 100644
--- a/meilisearch-http/src/routes/synonym.rs
+++ b/meilisearch-http/src/routes/synonym.rs
@@ -15,27 +15,24 @@ pub async fn get(ctx: Request<Data>) -> SResult<Response> {
     let index = ctx.index()?;
 
     let db = &ctx.state().db;
-    let reader = db.main_read_txn().map_err(ResponseError::internal)?;
+    let reader = db.main_read_txn()?;
 
     let synonyms_fst = index
         .main
-        .synonyms_fst(&reader)
-        .map_err(ResponseError::internal)?;
+        .synonyms_fst(&reader)?;
 
     let synonyms_fst = synonyms_fst.unwrap_or_default();
-    let synonyms_list = synonyms_fst.stream().into_strs().map_err(ResponseError::internal)?;
+    let synonyms_list = synonyms_fst.stream().into_strs()?;
 
     let mut response = IndexMap::new();
 
     let index_synonyms = &index.synonyms;
 
     for synonym in synonyms_list {
-        let alternative_list = index_synonyms
-            .synonyms(&reader, synonym.as_bytes())
-            .map_err(ResponseError::internal)?;
+        let alternative_list = index_synonyms.synonyms(&reader, synonym.as_bytes())?;
 
         if let Some(list) = alternative_list {
-            let list = list.stream().into_strs().map_err(ResponseError::internal)?;
+            let list = list.stream().into_strs()?;
             response.insert(synonym, list);
         }
     }
@@ -51,17 +48,16 @@ pub async fn update(mut ctx: Request<Data>) -> SResult<Response> {
     let index = ctx.index()?;
 
     let db = &ctx.state().db;
-    let mut writer = db.update_write_txn().map_err(ResponseError::internal)?;
+    let mut writer = db.update_write_txn()?;
 
     let settings = SettingsUpdate {
         synonyms: UpdateState::Update(data),
         .. SettingsUpdate::default()
     };
 
-    let update_id = index.settings_update(&mut writer, settings)
-        .map_err(ResponseError::internal)?;
+    let update_id = index.settings_update(&mut writer, settings)?;
 
-    writer.commit().map_err(ResponseError::internal)?;
+    writer.commit()?;
 
     let response_body = IndexUpdateResponse { update_id };
     Ok(tide::Response::new(202).body_json(&response_body).unwrap())
@@ -74,17 +70,16 @@ pub async fn delete(ctx: Request<Data>) -> SResult<Response> {
     let index = ctx.index()?;
 
     let db = &ctx.state().db;
-    let mut writer = db.update_write_txn().map_err(ResponseError::internal)?;
+    let mut writer = db.update_write_txn()?;
 
     let settings = SettingsUpdate {
         synonyms: UpdateState::Clear,
         .. SettingsUpdate::default()
     };
 
-    let update_id = index.settings_update(&mut writer, settings)
-        .map_err(ResponseError::internal)?;
+    let update_id = index.settings_update(&mut writer, settings)?;
 
-    writer.commit().map_err(ResponseError::internal)?;
+    writer.commit()?;
 
     let response_body = IndexUpdateResponse { update_id };
     Ok(tide::Response::new(202).body_json(&response_body).unwrap())