Implement proof-of-work

Using blacke2s: https://docs.rs/blake2/0.9.1/blake2/
Using this guy's hash checker https://gist.github.com/gkbrk/2e4835e3a17b3fb6e1e7

blacke2s with 5 bits 0 can mine a block between 20 seconds to 359 during
my tests, hope it'll be fun

1 files changed, 35 insertions, 0 deletions

diff --git a/Cargo.lock b/Cargo.lock
index d4d5926..1116c65 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -45,6 +45,17 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "cf1de2fe8c75bc145a2f577add951f8134889b4795d47466a54a5c846d691693"
 
 [[package]]
+name = "blake2"
+version = "0.9.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "10a5720225ef5daecf08657f23791354e1685a8c91a4c60c7f3d3b2892f978f4"
+dependencies = [
+ "crypto-mac",
+ "digest",
+ "opaque-debug",
+]
+
+[[package]]
 name = "block-buffer"
 version = "0.9.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -123,6 +134,16 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8aebca1129a03dc6dc2b127edd729435bbc4a37e1d5f4d7513165089ceb02634"
 
 [[package]]
+name = "crypto-mac"
+version = "0.8.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b584a330336237c1eecd3e94266efb216c56ed91225d634cb2991c5f3fd1aeab"
+dependencies = [
+ "generic-array",
+ "subtle",
+]
+
+[[package]]
 name = "digest"
 version = "0.9.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -280,7 +301,9 @@ dependencies = [
 name = "gradecoin"
 version = "0.1.0"
 dependencies = [
+ "blake2",
  "chrono",
+ "hex-literal",
  "lazy_static",
  "log",
  "parking_lot",
@@ -353,6 +376,12 @@ dependencies = [
 ]
 
 [[package]]
+name = "hex-literal"
+version = "0.3.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5af1f635ef1bc545d78392b136bfe1c9809e029023c84a3638a864a10b8819c8"
+
+[[package]]
 name = "http"
 version = "0.2.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -980,6 +1009,12 @@ dependencies = [
 ]
 
 [[package]]
+name = "subtle"
+version = "2.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1e81da0851ada1f3e9d4312c704aa4f8806f0f9d69faaf8df2f3464b4a9437c2"
+
+[[package]]
 name = "syn"
 version = "1.0.68"
 source = "registry+https://github.com/rust-lang/crates.io-index"