add ripemd160 crate

Cargo.lock

@@ -1332,6 +1332,7 @@ dependencies = [
  "prettytable-rs",
  "rand 0.7.3",
  "rand_core 0.5.1",
+ "ripemd160",
  "rocksdb",
  "rusqlite",
  "secp256k1",
@@ -3444,6 +3445,17 @@ dependencies = [
  "winapi 0.3.9",
 ]
 
+[[package]]
+name = "ripemd160"
+version = "0.9.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2eca4ecc81b7f313189bf73ce724400a07da2a6dac19588b03c8bd76a2dcc251"
+dependencies = [
+ "block-buffer 0.9.0",
+ "digest 0.9.0",
+ "opaque-debug 0.3.0",
+]
+
 [[package]]
 name = "rocksdb"
 version = "0.16.0"

Cargo.toml

@@ -22,6 +22,7 @@ zcash_proofs = "0.5.0"
 rand = "0.7.3"
 rand_core = "0.5.1"
 sha2 = "0.9.8"
+ripemd160 = "0.9.1"
 blake2s_simd = "0.5"
 blake2b_simd = "0.5.11"
 crypto_api_chachapoly = "0.4"