PoW generation stuff along with brute force

Cargo.lock

@@ -110,6 +110,7 @@ dependencies = [
  "serde-big-array",
  "sha2",
  "socket2",
+ "threadpool",
  "x25519-dalek",
  "zeroize",
 ]
@@ -134,6 +135,7 @@ dependencies = [
  "serde-big-array",
  "sha2",
  "socket2",
+ "threadpool",
  "x25519-dalek",
  "zeroize",
 ]
@@ -167,6 +169,7 @@ dependencies = [
  "serde-big-array",
  "sha2",
  "socket2",
+ "threadpool",
  "x25519-dalek",
  "zeroize",
 ]
@@ -345,6 +348,12 @@ dependencies = [
  "stable_deref_trait",
 ]
 
+[[package]]
+name = "hermit-abi"
+version = "0.3.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d231dfb89cfffdbc30e7fc41579ed6066ad03abda9e567ccafae602b97ec5024"
+
 [[package]]
 name = "hkdf"
 version = "0.12.4"
@@ -450,6 +459,16 @@ dependencies = [
  "libm",
 ]
 
+[[package]]
+name = "num_cpus"
+version = "1.16.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4161fcb6d602d4d2081af7c3a45852d875a03dd337a6bfdd6e06407b61342a43"
+dependencies = [
+ "hermit-abi",
+ "libc",
+]
+
 [[package]]
 name = "opaque-debug"
 version = "0.3.1"
@@ -685,6 +704,7 @@ dependencies = [
  "serde-big-array",
  "sha2",
  "socket2",
+ "threadpool",
  "x25519-dalek",
  "zeroize",
 ]
@@ -768,6 +788,15 @@ dependencies = [
  "unicode-ident",
 ]
 
+[[package]]
+name = "threadpool"
+version = "1.8.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d050e60b33d41c19108b32cea32164033a9013fe3b46cbd4457559bfbf77afaa"
+dependencies = [
+ "num_cpus",
+]
+
 [[package]]
 name = "typenum"
 version = "1.18.0"