Updated readme to reflect new added fn

Cargo.toml

@@ -10,7 +10,7 @@ keywords = ["PoW", "sha256", "proof-of-work"]
 readme = "readme.md"
 license = "MIT OR Apache-2.0"
 repository = "https://github.com/robkorn/pow"
-categories = ["pow", "sha256"] 
+categories = ["algorithms"] 
 [dependencies]
 sha2 = "0.8.0"
 serde = { version = "1.0.97", features = ["derive"] }

readme.md

@@ -25,7 +25,7 @@ let phrase = b"Phrase to be used.".to_vec();
 let pw = PoW::prove_work(&phrase, difficulty).unwrap();
 
 // Asserting that the result is of sufficient difficulty
-assert!(pw.result >= difficulty);
+assert!(pw.is_sufficient_difficulty(difficulty));
 
 // Asserting that the PoW was generated from the provided phrase
 assert!(pw.is_valid_proof(&phrase))
@@ -40,6 +40,7 @@ let difficulty = u128::max_value() - u128::max_value() / 100_000;
 let now: u64 = get_unix_time_seconds();
 let pw = PoW::prove_work(&now, difficulty).unwrap();
 
+// Alternative way to check that the result is of sufficient difficulty
 assert!(pw.result >= difficulty);
 assert!(pw.is_valid_proof(&phrase))
 ```