Feature/slate serialization (#2534)

* - Add backwards compatability
- Add hex serialization

* rustfmt

* rustfmt

* Windows Compatibility Fixes #1 (#2535)

* initial changes for windows build and unit/integration tests

* rustfmt

* wallet+store tests

* rustfmt

* fix linux daemonize

* better encapsulate file rename

* rustfmt

* remove daemonize commands

* rustfmt

* remove server start/stop commands

* add ability to drop pmmr backend files explicitly for txhashset unzip

* rustfmt

* fix pmmr tests

* rustfmt

* Windows TUI Fix (#2555)

* switch pancurses backend to win32

* revert changes to restore test

* compatibility fix + debug messages

* rustfmt

* Add content disposition for OK responses  (#2545)

* Testing http send and fixing accordingly

* add repost method into wallet owner api (#2553)

* add repost method into wallet owner api

* rustfmt

* Add ability to compare selection strategies (#2516)

Before tx creation user can estimate fee and locked amount
with different selection strategies by providing `-e` flag for
`wallet send` command.

chain/src/chain.rs

@@ -857,6 +857,14 @@ impl Chain {
 		}
 
 		let header = self.get_block_header(&h)?;
+
+		{
+			let mut txhashset_ref = self.txhashset.write();
+			// Drop file handles in underlying txhashset
+			txhashset_ref.release_backend_files();
+		}
+
+		// Rewrite hashset
 		txhashset::zip_write(self.db_root.clone(), txhashset_data, &header)?;
 
 		let mut txhashset =

chain/src/txhashset/txhashset.rs

@@ -18,7 +18,7 @@
 use crate::core::core::committed::Committed;
 use crate::core::core::hash::{Hash, Hashed};
 use crate::core::core::merkle_proof::MerkleProof;
-use crate::core::core::pmmr::{self, ReadonlyPMMR, RewindablePMMR, PMMR};
+use crate::core::core::pmmr::{self, Backend, ReadonlyPMMR, RewindablePMMR, PMMR};
 use crate::core::core::{
 	Block, BlockHeader, Input, Output, OutputIdentifier, TxKernel, TxKernelEntry,
 };
@@ -153,6 +153,15 @@ impl TxHashSet {
 		})
 	}
 
+	/// Close all backend file handles
+	pub fn release_backend_files(&mut self) {
+		self.header_pmmr_h.backend.release_files();
+		self.sync_pmmr_h.backend.release_files();
+		self.output_pmmr_h.backend.release_files();
+		self.rproof_pmmr_h.backend.release_files();
+		self.kernel_pmmr_h.backend.release_files();
+	}
+
 	/// Check if an output is unspent.
 	/// We look in the index to find the output MMR pos.
 	/// Then we check the entry in the output MMR and confirm the hash matches.