Update copyright notices and use the copyright ident on every public …

…interface file (#224)

* Standardize the usage of SPDX-License-Identifier

SPDX License Identifiers
(https://spdx.dev/learn/handling-license-info/)
are human and computer-readable format  to  communicate licensing
information about some file. Up to now, we used it very sparsely and
with no clear standard. This commit uses SPDX tags on every (and only on)
top-level files (i.e. `lib.rs` and `main.rs`).

* update LICENSE file

LICENSE

@@ -1,6 +1,6 @@
 MIT License
 
-Copyright (c) 2023 Davidson Souza
+Copyright (c) 2024 The Floresta Project Developers
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal

crates/floresta-chain/src/lib.rs

@@ -1,4 +1,5 @@
 // SPDX-License-Identifier: MIT
+
 //! # Floresta Chain
 //! This crate provides the core validation logic for a full node using libfloresta.
 //! It is maintained as a separate crate to allow other projects to build on it,

crates/floresta-chain/src/pruned_utreexo/chainstore.rs

@@ -1,7 +1,6 @@
-// Written in 2022 by Davidson Souza
-
 //! This is a basic kv database that stores all metadata about our blockchain and utreexo
 //! state.
+
 use bitcoin::block::Header as BlockHeader;
 use bitcoin::consensus::deserialize;
 use bitcoin::consensus::serialize;

crates/floresta-common/src/lib.rs

@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: MIT
+
 #![no_std]
 use bitcoin::hashes::sha256;
 use bitcoin::hashes::Hash;

crates/floresta-compact-filters/src/bip158.rs

@@ -1,5 +1,3 @@
-// SPDX-License-Identifier: CC0-1.0
-
 // This module was largely copied from https://github.com/rust-bitcoin/murmel/blob/master/src/blockfilter.rs
 // on 11. June 2019 which is licensed under Apache, that file specifically
 // was written entirely by Tamas Blummer, who is re-licensing its contents here as CC0.

crates/floresta-electrum/src/lib.rs

@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: MIT
+
 use serde::Deserialize;
 use serde::Serialize;
 

crates/floresta-watch-only/src/lib.rs

@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: MIT
+
 #![cfg_attr(feature = "no-std", no_std)]
 use core::cmp::Ordering;
 use core::fmt::Debug;

crates/floresta-wire/src/lib.rs

@@ -1,4 +1,5 @@
 // SPDX-License-Identifier: MIT
+
 //! # Floresta Wire
 //! This crate provides the core networking logic for a full node using libfloresta,
 //! including the P2P network and the mempool. You can easily integrate it with any

florestad/src/lib.rs

@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: MIT
+
 mod config_file;
 mod error;
 mod florestad;

florestad/src/main.rs

@@ -1,5 +1,4 @@
-// Written in 2022 by Davidson Souza.
-// SPDX-License-Identifier: CC0-1.0
+// SPDX-License-Identifier: MIT
 
 //! This is a modular-(ish) utreexo powered wallet backend and fully validating node, it's
 //! developed as an experiment to showcase utreexo. This wallet also comes with an Electrum