From d0888c8cf32059632fb56d5cb83045a5be0c1472 Mon Sep 17 00:00:00 2001
From: "hinto.janai" <hinto.janai@protonmail.com>
Date: Fri, 4 Oct 2024 16:20:25 -0400
Subject: [PATCH] remove `BlockchainReadRequest::Difficulty`

---
 .../cuprated/src/rpc/request/blockchain.rs    | 19 -------------------
 storage/blockchain/src/service/read.rs        |  6 ------
 types/src/blockchain.rs                       | 15 ++-------------
 3 files changed, 2 insertions(+), 38 deletions(-)

diff --git a/binaries/cuprated/src/rpc/request/blockchain.rs b/binaries/cuprated/src/rpc/request/blockchain.rs
index 4324fdc..c4016c9 100644
--- a/binaries/cuprated/src/rpc/request/blockchain.rs
+++ b/binaries/cuprated/src/rpc/request/blockchain.rs
@@ -269,25 +269,6 @@ pub(super) async fn database_size(
     Ok((database_size, free_space))
 }
 
-/// [`BlockchainReadRequest::Difficulty`]
-pub(super) async fn difficulty(
-    mut blockchain_read: BlockchainReadHandle,
-    block_height: u64,
-) -> Result<u128, Error> {
-    let BlockchainResponse::Difficulty(difficulty) = blockchain_read
-        .ready()
-        .await?
-        .call(BlockchainReadRequest::Difficulty(u64_to_usize(
-            block_height,
-        )))
-        .await?
-    else {
-        unreachable!();
-    };
-
-    Ok(difficulty)
-}
-
 /// [`BlockchainReadRequest::OutputHistogram`]
 pub(super) async fn output_histogram(
     mut blockchain_read: BlockchainReadHandle,
diff --git a/storage/blockchain/src/service/read.rs b/storage/blockchain/src/service/read.rs
index 05af6ca..1530bd4 100644
--- a/storage/blockchain/src/service/read.rs
+++ b/storage/blockchain/src/service/read.rs
@@ -119,7 +119,6 @@ fn map_request(
         R::BlockByHash(hash) => block_by_hash(env, hash),
         R::TotalTxCount => total_tx_count(env),
         R::DatabaseSize => database_size(env),
-        R::Difficulty(height) => difficulty(env, height),
         R::OutputHistogram(input) => output_histogram(env, input),
         R::CoinbaseTxSum { height, count } => coinbase_tx_sum(env, height, count),
         R::MinerData => miner_data(env),
@@ -641,11 +640,6 @@ fn database_size(env: &ConcreteEnv) -> ResponseResult {
     })
 }
 
-/// [`BlockchainReadRequest::Difficulty()`]
-fn difficulty(env: &ConcreteEnv, block_height: BlockHeight) -> ResponseResult {
-    Ok(BlockchainResponse::Difficulty(todo!()))
-}
-
 /// [`BlockchainReadRequest::OutputHistogram`]
 fn output_histogram(env: &ConcreteEnv, input: OutputHistogramInput) -> ResponseResult {
     Ok(BlockchainResponse::OutputHistogram(todo!()))
diff --git a/types/src/blockchain.rs b/types/src/blockchain.rs
index e29ba30..8913657 100644
--- a/types/src/blockchain.rs
+++ b/types/src/blockchain.rs
@@ -108,9 +108,7 @@ pub enum BlockchainReadRequest {
     AltBlocksInChain(ChainId),
 
     /// Get a [`Block`] by its height.
-    Block {
-        height: usize,
-    },
+    Block { height: usize },
 
     /// Get a [`Block`] by its hash.
     BlockByHash([u8; 32]),
@@ -121,9 +119,6 @@ pub enum BlockchainReadRequest {
     /// Get the current size of the database.
     DatabaseSize,
 
-    // Get the difficulty for the next block in the chain.
-    Difficulty(usize),
-
     /// Get an output histogram.
     ///
     /// TODO: document fields after impl.
@@ -133,10 +128,7 @@ pub enum BlockchainReadRequest {
     /// `N` last blocks starting at particular height.
     ///
     /// TODO: document fields after impl.
-    CoinbaseTxSum {
-        height: usize,
-        count: u64,
-    },
+    CoinbaseTxSum { height: usize, count: u64 },
 
     /// Get the necessary data to create a custom block template.
     MinerData,
@@ -282,9 +274,6 @@ pub enum BlockchainResponse {
         free_space: u64,
     },
 
-    /// Response to [`BlockchainReadRequest::Difficulty`].
-    Difficulty(u128),
-
     /// Response to [`BlockchainReadRequest::OutputHistogram`].
     OutputHistogram(Vec<OutputHistogramEntry>),