add bs58 crate

Cargo.lock

@@ -1,5 +1,7 @@
 # This file is automatically @generated by Cargo.
 # It is not intended for manual editing.
+version = 3
+
 [[package]]
 name = "addr2line"
 version = "0.15.2"
@@ -561,6 +563,12 @@ dependencies = [
  "subtle",
 ]
 
+[[package]]
+name = "bs58"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "771fe0050b883fcc3ea2359b1a96bcfbc090b7116eae7c3c512c7a083fdf23d3"
+
 [[package]]
 name = "bumpalo"
 version = "3.7.0"
@@ -989,6 +997,7 @@ dependencies = [
  "blake2b_simd",
  "blake2s_simd",
  "bls12_381",
+ "bs58",
  "bytes 1.0.1",
  "clap",
  "crypto_api_chachapoly",

Cargo.toml

@@ -13,6 +13,7 @@ group = "0.8"
 bellman = { version = "0.8", default-features = false, features = ["groth16"] }
 bls12_381 = "0.3.1"
 jubjub = "0.5.1"
+bs58 = "0.4.0"
 
 zcash_primitives = "0.5.0"
 zcash_proofs = "0.5.0"