implemented /mempool endpoint, can now access mempool info such as the fee historgram

Author: shanmukanaks

src/api.rs

@@ -123,6 +123,14 @@ pub struct AddressTxsSummary {
     pub tx_count: u32,
 }
 
+#[derive(Deserialize, Clone, Debug, PartialEq)]
+pub struct MempoolInfo {
+    pub count: u32,
+    pub vsize: u64,
+    pub total_fee: u64,
+    pub fee_histogram: Vec<(f32, u64)>,
+}
+
 impl Tx {
     pub fn to_tx(&self) -> Transaction {
         Transaction {

src/async.rs

@@ -28,7 +28,7 @@ use log::{debug, error, info, trace};
 
 use reqwest::{header, Client, Response};
 
-use crate::api::AddressStats;
+use crate::api::{AddressStats, MempoolInfo};
 use crate::{
     BlockStatus, BlockSummary, Builder, Error, MerkleProof, OutputStatus, Tx, TxStatus,
     BASE_BACKOFF_MILLIS, RETRYABLE_ERROR_CODES,
@@ -432,6 +432,10 @@ impl<S: Sleeper> AsyncClient<S> {
         self.get_response_json("/fee-estimates").await
     }
 
+    pub async fn get_mempool_info(&self) -> Result<MempoolInfo, Error> {
+        self.get_response_json("/mempool").await
+    }
+
     /// Gets some recent block summaries starting at the tip or at `height` if
     /// provided.
     ///

src/blocking.rs

@@ -29,7 +29,7 @@ use bitcoin::{
     block::Header as BlockHeader, Block, BlockHash, MerkleBlock, Script, Transaction, Txid,
 };
 
-use crate::api::AddressStats;
+use crate::api::{AddressStats, MempoolInfo};
 use crate::{
     BlockStatus, BlockSummary, Builder, Error, MerkleProof, OutputStatus, Tx, TxStatus,
     BASE_BACKOFF_MILLIS, RETRYABLE_ERROR_CODES,
@@ -319,6 +319,10 @@ impl BlockingClient {
         self.get_response_json("/fee-estimates")
     }
 
+    pub fn get_mempool_info(&self) -> Result<MempoolInfo, Error> {
+        self.get_response_json("/mempool")
+    }
+
     /// Get information about a specific address, includes confirmed balance and transactions in
     /// the mempool.
     pub fn get_address_stats(&self, address: &Address) -> Result<AddressStats, Error> {