global: next block template (+ diff)

crates/brk_server/src/params/mod.rs

@@ -6,6 +6,7 @@ mod blockhash_start_index;
 mod blockhash_tx_index;
 mod empty;
 mod height_param;
+mod next_block_hash_param;
 mod pool_slug_param;
 mod series_param;
 mod time_period_param;
@@ -25,6 +26,7 @@ pub use blockhash_start_index::*;
 pub use blockhash_tx_index::*;
 pub use empty::*;
 pub use height_param::*;
+pub use next_block_hash_param::*;
 pub use pool_slug_param::*;
 pub use series_param::*;
 pub use time_period_param::*;

crates/brk_server/src/params/next_block_hash_param.rs

@@ -0,0 +1,10 @@
+use schemars::JsonSchema;
+use serde::Deserialize;
+
+use brk_types::NextBlockHash;
+
+/// `since` hash for `/api/v1/mining/block-template/diff/{hash}`.
+#[derive(Deserialize, JsonSchema)]
+pub struct NextBlockHashParam {
+    pub hash: NextBlockHash,
+}