make btc address

btc-address/src/main.rs

@@ -1,14 +1,50 @@
 use rand::rngs::OsRng;
-use secp256k1::Secp256k1;
+use secp256k1::{Secp256k1, key::PublicKey, };
+use sha2::Sha256;
+use ripemd160::Ripemd160;
+use digest::{ Input, FixedOutput, };
 
 fn main() {
-    println!("Hello, world!");
-
     let secp = Secp256k1::new();
     let mut rng = OsRng::new().expect("OsRng");
-    let (secret_key, public_key) = secp.generate_keypair(&mut rng);
 
-    println!("{}", secret_key);
-    println!("{}", public_key);
-    println!("{}", hex::encode(public_key.serialize_uncompressed().to_vec()));
+    for i in 0..1_000_000 {
+        let (secret_key, public_key) = secp.generate_keypair(&mut rng);
+
+        let s = make_btc_address(&public_key);
+
+        if i > 0 && i % 10000 == 0 {
+            println!("> {}", i);
+        }
+        if s.starts_with("100") {
+            println!("{}", s);
+            println!("{}", secret_key);
+        }
+    }
+}
+
+fn make_btc_address(public_key: &PublicKey) -> String {
+    let public_key_bytes = public_key.serialize_uncompressed().to_vec();
+    let riphemd160_sha256_pub_key = calc_ripemd160(&calc_sha256(&public_key_bytes));
+
+    let mut btc_addr = Vec::<u8>::with_capacity(25);
+    btc_addr.push(0x00 as u8);
+    btc_addr.extend_from_slice(&riphemd160_sha256_pub_key);
+
+    let chcksum = &calc_sha256(&calc_sha256(&btc_addr))[0..4];
+    btc_addr.extend_from_slice(chcksum);
+
+    bs58::encode(&btc_addr).into_string()
+}
+
+fn calc_sha256(i: &[u8]) -> Vec<u8> {
+    let mut hasher = Sha256::default();
+    hasher.input(&i);
+    hasher.fixed_result().to_vec()
+}
+
+fn calc_ripemd160(i: &[u8]) -> Vec<u8> {
+    let mut hasher = Ripemd160::default();
+    hasher.input(&i);
+    hasher.fixed_result().to_vec()
 }