RPC-468 changes to priority fee service for better modularity and exposing a detailed result API for better visibility

Cargo.toml

@@ -40,4 +40,5 @@ futures = "0.3.24"
 figment = { version = "0.10.6", features = ["env", "test"] }
 tower = { version = "0.4.13", features = ["full"] }
 thiserror = "1.0.63"
-anyhow = "1.0.86"
+anyhow = "1.0.86"
+statrs = "0.17.1"

README.md

@@ -116,3 +116,73 @@ cargo run
   "id": "1"
 }
 ```
+
+**Request the recommended priority fee details**
+The purpose of this API is to understand what data is taken into consideration given the query.
+The response shows the statistical distribution of data per account as well as how much data is available in each account.
+The request is identical to the one used in getPriorityFeeEstimate request. This is to ensure that same request could be
+reused during analysis and during dev / operational stages
+
+```json
+{
+  "id": "version1",
+  "jsonrpc": "2.0",
+  "method": "getPriorityFeeEstimateDetails",
+  "params": [
+    {
+      "accountKeys": [
+"JUP6LkbZbjS1jKKwapdHNy74zcZ3tLUZoi5QNyVTaV4"
+      ],
+      "options": {"recommended": true}
+    }
+  ]
+}
+```
+
+**Response**
+
+```json
+{
+  "jsonrpc": "2.0",
+  "result": {
+    "priorityFeeEstimateDetails": [
+      [
+        "JUP6LkbZbjS1jKKwapdHNy74zcZ3tLUZoi5QNyVTaV4",
+        {
+          "estimates": {
+            "min": 0.0,
+            "low": 0.0,
+            "medium": 0.0,
+            "high": 0.0,
+            "veryHigh": 0.0,
+            "unsafeMax": 25113388.0
+          },
+          "mean": 717525.0, // mean fee payed for each transaction for account evaluated over last 150 (or less if requested less) slots 
+          "stdev": 4244937.0, // standard deviation of fee payed for each transaction for account evaluated over last 150 (or less if requested less) slots ,
+          "skew": null, // skew of fee payed for each transaction for account evaluated over last 150 (or less if requested less) slots. Null if data is randomly distributed and cannot calculate
+          "count": 35  // Number of transactions for account that were evaluated over last 150 (or less if requested less) slots
+        }
+      ],
+      [
+        "Global",
+        {
+          "estimates": {
+            "min": 0.0,
+            "low": 0.0,
+            "medium": 20003.0,
+            "high": 2276532.0,
+            "veryHigh": 32352142.0,
+            "unsafeMax": 2000000000.0
+          },
+          "mean": 8118956.0, // mean fee payed for each transaction for all accounts evaluated over last 150 (or less if requested less) slots
+          "stdev": 53346050.0, // standard deviation of fee payed for each transaction for all account evaluated over last 150 (or less if requested less) slots ,
+          "skew": null, // skew of fee payed for each transaction for all accounts evaluated over last 150 (or less if requested less) slots. Null if data is randomly distributed and cannot calculate
+          "count": 14877  // Number of transactions for all accounts that were evaluated over last 150 (or less if requested less) slots
+        }
+      ]
+    ],
+    "priorityFeeEstimate": 20003.0
+  },
+  "id": "version1"
+}
+```

src/errors.rs

@@ -1,5 +1,24 @@
 use jsonrpsee::types::{error::INVALID_PARAMS_CODE, ErrorObjectOwned};
 
+#[derive(Debug, Copy, Clone, PartialEq)]
+pub enum TransactionValidationError {
+    TransactionFailed,
+    TransactionMissing,
+    MessageMissing,
+    InvalidAccount,
+}
+
+impl Into<&str> for TransactionValidationError {
+    fn into(self) -> &'static str {
+        match self {
+            TransactionValidationError::TransactionFailed => "txn_failed",
+            TransactionValidationError::TransactionMissing => "txn_missing",
+            TransactionValidationError::MessageMissing => "message_missing",
+            TransactionValidationError::InvalidAccount => "invalid_pubkey",
+        }
+    }
+}
+
 pub fn invalid_request(reason: &str) -> ErrorObjectOwned {
     ErrorObjectOwned::owned(
         INVALID_PARAMS_CODE,

src/lib.rs

@@ -0,0 +1,9 @@
+pub mod errors;
+pub mod grpc_consumer;
+pub mod grpc_geyser;
+pub mod model;
+pub mod priority_fee;
+pub mod priority_fee_calculation;
+pub mod rpc_server;
+pub mod slot_cache;
+pub mod solana;

src/main.rs

@@ -1,24 +1,15 @@
 use std::{env, net::UdpSocket, sync::Arc};
 
-use crate::rpc_server::AtlasPriorityFeeEstimatorRpcServer;
 use cadence::{BufferedUdpMetricSink, QueuingMetricSink, StatsdClient};
 use cadence_macros::set_global_default;
 use figment::{providers::Env, Figment};
-use grpc_geyser::GrpcGeyserImpl;
 use jsonrpsee::server::ServerBuilder;
 use jsonrpsee::server::middleware::http::ProxyGetRequestLayer;
-use priority_fee::PriorityFeeTracker;
-use rpc_server::AtlasPriorityFeeEstimator;
 use serde::Deserialize;
 use tracing::{error, info};
-
-mod errors;
-mod grpc_consumer;
-mod grpc_geyser;
-mod priority_fee;
-mod rpc_server;
-mod slot_cache;
-mod solana;
+use atlas_priority_fee_estimator::grpc_geyser::GrpcGeyserImpl;
+use atlas_priority_fee_estimator::priority_fee::PriorityFeeTracker;
+use atlas_priority_fee_estimator::rpc_server::{AtlasPriorityFeeEstimator, AtlasPriorityFeeEstimatorRpcServer};
 
 #[derive(Debug, Deserialize, Clone)]
 struct EstimatorEnv {