diff --git a/Cargo.lock b/Cargo.lock
index 0dfdfd31..33c13e61 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -107,17 +107,17 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 [[package]]
 name = "bellman"
 version = "0.1.0"
-source = "git+https://github.com/str4d/librustzcash.git?rev=ae63116f639847e54716fbf47f19589d12038a16#ae63116f639847e54716fbf47f19589d12038a16"
+source = "git+https://github.com/str4d/librustzcash.git?rev=0134e6c26e4d26ec646f01032f6cb900910b9317#0134e6c26e4d26ec646f01032f6cb900910b9317"
 dependencies = [
  "bit-vec 0.4.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "byteorder 1.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "crossbeam 0.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "ff 0.4.0 (git+https://github.com/str4d/librustzcash.git?rev=ae63116f639847e54716fbf47f19589d12038a16)",
+ "ff 0.4.0 (git+https://github.com/str4d/librustzcash.git?rev=0134e6c26e4d26ec646f01032f6cb900910b9317)",
  "futures 0.1.25 (registry+https://github.com/rust-lang/crates.io-index)",
  "futures-cpupool 0.1.8 (registry+https://github.com/rust-lang/crates.io-index)",
- "group 0.1.0 (git+https://github.com/str4d/librustzcash.git?rev=ae63116f639847e54716fbf47f19589d12038a16)",
+ "group 0.1.0 (git+https://github.com/str4d/librustzcash.git?rev=0134e6c26e4d26ec646f01032f6cb900910b9317)",
  "num_cpus 1.9.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "pairing 0.14.2 (git+https://github.com/str4d/librustzcash.git?rev=ae63116f639847e54716fbf47f19589d12038a16)",
+ "pairing 0.14.2 (git+https://github.com/str4d/librustzcash.git?rev=0134e6c26e4d26ec646f01032f6cb900910b9317)",
  "rand 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -385,17 +385,17 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 [[package]]
 name = "ff"
 version = "0.4.0"
-source = "git+https://github.com/str4d/librustzcash.git?rev=ae63116f639847e54716fbf47f19589d12038a16#ae63116f639847e54716fbf47f19589d12038a16"
+source = "git+https://github.com/str4d/librustzcash.git?rev=0134e6c26e4d26ec646f01032f6cb900910b9317#0134e6c26e4d26ec646f01032f6cb900910b9317"
 dependencies = [
  "byteorder 1.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "ff_derive 0.3.0 (git+https://github.com/str4d/librustzcash.git?rev=ae63116f639847e54716fbf47f19589d12038a16)",
+ "ff_derive 0.3.0 (git+https://github.com/str4d/librustzcash.git?rev=0134e6c26e4d26ec646f01032f6cb900910b9317)",
  "rand 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "ff_derive"
 version = "0.3.0"
-source = "git+https://github.com/str4d/librustzcash.git?rev=ae63116f639847e54716fbf47f19589d12038a16#ae63116f639847e54716fbf47f19589d12038a16"
+source = "git+https://github.com/str4d/librustzcash.git?rev=0134e6c26e4d26ec646f01032f6cb900910b9317#0134e6c26e4d26ec646f01032f6cb900910b9317"
 dependencies = [
  "num-bigint 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "num-integer 0.1.39 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -469,9 +469,9 @@ dependencies = [
 [[package]]
 name = "group"
 version = "0.1.0"
-source = "git+https://github.com/str4d/librustzcash.git?rev=ae63116f639847e54716fbf47f19589d12038a16#ae63116f639847e54716fbf47f19589d12038a16"
+source = "git+https://github.com/str4d/librustzcash.git?rev=0134e6c26e4d26ec646f01032f6cb900910b9317#0134e6c26e4d26ec646f01032f6cb900910b9317"
 dependencies = [
- "ff 0.4.0 (git+https://github.com/str4d/librustzcash.git?rev=ae63116f639847e54716fbf47f19589d12038a16)",
+ "ff 0.4.0 (git+https://github.com/str4d/librustzcash.git?rev=0134e6c26e4d26ec646f01032f6cb900910b9317)",
  "rand 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -746,11 +746,11 @@ dependencies = [
 [[package]]
 name = "pairing"
 version = "0.14.2"
-source = "git+https://github.com/str4d/librustzcash.git?rev=ae63116f639847e54716fbf47f19589d12038a16#ae63116f639847e54716fbf47f19589d12038a16"
+source = "git+https://github.com/str4d/librustzcash.git?rev=0134e6c26e4d26ec646f01032f6cb900910b9317#0134e6c26e4d26ec646f01032f6cb900910b9317"
 dependencies = [
  "byteorder 1.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "ff 0.4.0 (git+https://github.com/str4d/librustzcash.git?rev=ae63116f639847e54716fbf47f19589d12038a16)",
- "group 0.1.0 (git+https://github.com/str4d/librustzcash.git?rev=ae63116f639847e54716fbf47f19589d12038a16)",
+ "ff 0.4.0 (git+https://github.com/str4d/librustzcash.git?rev=0134e6c26e4d26ec646f01032f6cb900910b9317)",
+ "group 0.1.0 (git+https://github.com/str4d/librustzcash.git?rev=0134e6c26e4d26ec646f01032f6cb900910b9317)",
  "rand 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -982,14 +982,14 @@ dependencies = [
 [[package]]
 name = "sapling-crypto"
 version = "0.0.1"
-source = "git+https://github.com/str4d/librustzcash.git?rev=ae63116f639847e54716fbf47f19589d12038a16#ae63116f639847e54716fbf47f19589d12038a16"
+source = "git+https://github.com/str4d/librustzcash.git?rev=0134e6c26e4d26ec646f01032f6cb900910b9317#0134e6c26e4d26ec646f01032f6cb900910b9317"
 dependencies = [
- "bellman 0.1.0 (git+https://github.com/str4d/librustzcash.git?rev=ae63116f639847e54716fbf47f19589d12038a16)",
+ "bellman 0.1.0 (git+https://github.com/str4d/librustzcash.git?rev=0134e6c26e4d26ec646f01032f6cb900910b9317)",
  "blake2-rfc 0.2.18 (git+https://github.com/gtank/blake2-rfc?rev=7a5b5fc99ae483a0043db7547fb79a6fa44b88a9)",
  "byteorder 1.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "digest 0.7.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "ff 0.4.0 (git+https://github.com/str4d/librustzcash.git?rev=ae63116f639847e54716fbf47f19589d12038a16)",
- "pairing 0.14.2 (git+https://github.com/str4d/librustzcash.git?rev=ae63116f639847e54716fbf47f19589d12038a16)",
+ "ff 0.4.0 (git+https://github.com/str4d/librustzcash.git?rev=0134e6c26e4d26ec646f01032f6cb900910b9317)",
+ "pairing 0.14.2 (git+https://github.com/str4d/librustzcash.git?rev=0134e6c26e4d26ec646f01032f6cb900910b9317)",
  "rand 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -1448,88 +1448,88 @@ version = "0.0.1"
 dependencies = [
  "android_logger 0.6.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "failure 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
- "ff 0.4.0 (git+https://github.com/str4d/librustzcash.git?rev=ae63116f639847e54716fbf47f19589d12038a16)",
+ "ff 0.4.0 (git+https://github.com/str4d/librustzcash.git?rev=0134e6c26e4d26ec646f01032f6cb900910b9317)",
  "futures 0.1.25 (registry+https://github.com/rust-lang/crates.io-index)",
  "grpc 0.6.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "hex 0.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "jni 0.10.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "log-panics 2.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "pairing 0.14.2 (git+https://github.com/str4d/librustzcash.git?rev=ae63116f639847e54716fbf47f19589d12038a16)",
+ "pairing 0.14.2 (git+https://github.com/str4d/librustzcash.git?rev=0134e6c26e4d26ec646f01032f6cb900910b9317)",
  "protobuf 2.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "sapling-crypto 0.0.1 (git+https://github.com/str4d/librustzcash.git?rev=ae63116f639847e54716fbf47f19589d12038a16)",
- "zcash_client_backend 0.0.0 (git+https://github.com/str4d/librustzcash.git?rev=ae63116f639847e54716fbf47f19589d12038a16)",
- "zcash_client_sqlite 0.0.0 (git+https://github.com/str4d/librustzcash.git?rev=ae63116f639847e54716fbf47f19589d12038a16)",
- "zcash_primitives 0.0.0 (git+https://github.com/str4d/librustzcash.git?rev=ae63116f639847e54716fbf47f19589d12038a16)",
- "zcash_proofs 0.0.0 (git+https://github.com/str4d/librustzcash.git?rev=ae63116f639847e54716fbf47f19589d12038a16)",
+ "sapling-crypto 0.0.1 (git+https://github.com/str4d/librustzcash.git?rev=0134e6c26e4d26ec646f01032f6cb900910b9317)",
+ "zcash_client_backend 0.0.0 (git+https://github.com/str4d/librustzcash.git?rev=0134e6c26e4d26ec646f01032f6cb900910b9317)",
+ "zcash_client_sqlite 0.0.0 (git+https://github.com/str4d/librustzcash.git?rev=0134e6c26e4d26ec646f01032f6cb900910b9317)",
+ "zcash_primitives 0.0.0 (git+https://github.com/str4d/librustzcash.git?rev=0134e6c26e4d26ec646f01032f6cb900910b9317)",
+ "zcash_proofs 0.0.0 (git+https://github.com/str4d/librustzcash.git?rev=0134e6c26e4d26ec646f01032f6cb900910b9317)",
 ]
 
 [[package]]
 name = "zcash_client_backend"
 version = "0.0.0"
-source = "git+https://github.com/str4d/librustzcash.git?rev=ae63116f639847e54716fbf47f19589d12038a16#ae63116f639847e54716fbf47f19589d12038a16"
+source = "git+https://github.com/str4d/librustzcash.git?rev=0134e6c26e4d26ec646f01032f6cb900910b9317#0134e6c26e4d26ec646f01032f6cb900910b9317"
 dependencies = [
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  "bs58 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "ff 0.4.0 (git+https://github.com/str4d/librustzcash.git?rev=ae63116f639847e54716fbf47f19589d12038a16)",
+ "ff 0.4.0 (git+https://github.com/str4d/librustzcash.git?rev=0134e6c26e4d26ec646f01032f6cb900910b9317)",
  "hex 0.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "pairing 0.14.2 (git+https://github.com/str4d/librustzcash.git?rev=ae63116f639847e54716fbf47f19589d12038a16)",
+ "pairing 0.14.2 (git+https://github.com/str4d/librustzcash.git?rev=0134e6c26e4d26ec646f01032f6cb900910b9317)",
  "protobuf 2.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "protobuf-codegen-pure 2.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "sapling-crypto 0.0.1 (git+https://github.com/str4d/librustzcash.git?rev=ae63116f639847e54716fbf47f19589d12038a16)",
- "zcash_primitives 0.0.0 (git+https://github.com/str4d/librustzcash.git?rev=ae63116f639847e54716fbf47f19589d12038a16)",
+ "sapling-crypto 0.0.1 (git+https://github.com/str4d/librustzcash.git?rev=0134e6c26e4d26ec646f01032f6cb900910b9317)",
+ "zcash_primitives 0.0.0 (git+https://github.com/str4d/librustzcash.git?rev=0134e6c26e4d26ec646f01032f6cb900910b9317)",
 ]
 
 [[package]]
 name = "zcash_client_sqlite"
 version = "0.0.0"
-source = "git+https://github.com/str4d/librustzcash.git?rev=ae63116f639847e54716fbf47f19589d12038a16#ae63116f639847e54716fbf47f19589d12038a16"
+source = "git+https://github.com/str4d/librustzcash.git?rev=0134e6c26e4d26ec646f01032f6cb900910b9317#0134e6c26e4d26ec646f01032f6cb900910b9317"
 dependencies = [
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- "pairing 0.14.2 (git+https://github.com/str4d/librustzcash.git?rev=ae63116f639847e54716fbf47f19589d12038a16)",
+ "ff 0.4.0 (git+https://github.com/str4d/librustzcash.git?rev=0134e6c26e4d26ec646f01032f6cb900910b9317)",
+ "pairing 0.14.2 (git+https://github.com/str4d/librustzcash.git?rev=0134e6c26e4d26ec646f01032f6cb900910b9317)",
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- "sapling-crypto 0.0.1 (git+https://github.com/str4d/librustzcash.git?rev=ae63116f639847e54716fbf47f19589d12038a16)",
+ "sapling-crypto 0.0.1 (git+https://github.com/str4d/librustzcash.git?rev=0134e6c26e4d26ec646f01032f6cb900910b9317)",
  "time 0.1.42 (registry+https://github.com/rust-lang/crates.io-index)",
- "zcash_client_backend 0.0.0 (git+https://github.com/str4d/librustzcash.git?rev=ae63116f639847e54716fbf47f19589d12038a16)",
- "zcash_primitives 0.0.0 (git+https://github.com/str4d/librustzcash.git?rev=ae63116f639847e54716fbf47f19589d12038a16)",
+ "zcash_client_backend 0.0.0 (git+https://github.com/str4d/librustzcash.git?rev=0134e6c26e4d26ec646f01032f6cb900910b9317)",
+ "zcash_primitives 0.0.0 (git+https://github.com/str4d/librustzcash.git?rev=0134e6c26e4d26ec646f01032f6cb900910b9317)",
 ]
 
 [[package]]
 name = "zcash_primitives"
 version = "0.0.0"
-source = "git+https://github.com/str4d/librustzcash.git?rev=ae63116f639847e54716fbf47f19589d12038a16#ae63116f639847e54716fbf47f19589d12038a16"
+source = "git+https://github.com/str4d/librustzcash.git?rev=0134e6c26e4d26ec646f01032f6cb900910b9317#0134e6c26e4d26ec646f01032f6cb900910b9317"
 dependencies = [
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  "crypto_api_chachapoly 0.1.8 (registry+https://github.com/rust-lang/crates.io-index)",
- "ff 0.4.0 (git+https://github.com/str4d/librustzcash.git?rev=ae63116f639847e54716fbf47f19589d12038a16)",
+ "ff 0.4.0 (git+https://github.com/str4d/librustzcash.git?rev=0134e6c26e4d26ec646f01032f6cb900910b9317)",
  "fpe 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "hex 0.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "lazy_static 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "pairing 0.14.2 (git+https://github.com/str4d/librustzcash.git?rev=ae63116f639847e54716fbf47f19589d12038a16)",
+ "pairing 0.14.2 (git+https://github.com/str4d/librustzcash.git?rev=0134e6c26e4d26ec646f01032f6cb900910b9317)",
  "rand 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "sapling-crypto 0.0.1 (git+https://github.com/str4d/librustzcash.git?rev=ae63116f639847e54716fbf47f19589d12038a16)",
+ "sapling-crypto 0.0.1 (git+https://github.com/str4d/librustzcash.git?rev=0134e6c26e4d26ec646f01032f6cb900910b9317)",
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 [[package]]
 name = "zcash_proofs"
 version = "0.0.0"
-source = "git+https://github.com/str4d/librustzcash.git?rev=ae63116f639847e54716fbf47f19589d12038a16#ae63116f639847e54716fbf47f19589d12038a16"
+source = "git+https://github.com/str4d/librustzcash.git?rev=0134e6c26e4d26ec646f01032f6cb900910b9317#0134e6c26e4d26ec646f01032f6cb900910b9317"
 dependencies = [
- "bellman 0.1.0 (git+https://github.com/str4d/librustzcash.git?rev=ae63116f639847e54716fbf47f19589d12038a16)",
+ "bellman 0.1.0 (git+https://github.com/str4d/librustzcash.git?rev=0134e6c26e4d26ec646f01032f6cb900910b9317)",
  "blake2-rfc 0.2.18 (git+https://github.com/gtank/blake2-rfc?rev=7a5b5fc99ae483a0043db7547fb79a6fa44b88a9)",
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  "directories 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "ff 0.4.0 (git+https://github.com/str4d/librustzcash.git?rev=ae63116f639847e54716fbf47f19589d12038a16)",
- "pairing 0.14.2 (git+https://github.com/str4d/librustzcash.git?rev=ae63116f639847e54716fbf47f19589d12038a16)",
+ "ff 0.4.0 (git+https://github.com/str4d/librustzcash.git?rev=0134e6c26e4d26ec646f01032f6cb900910b9317)",
+ "pairing 0.14.2 (git+https://github.com/str4d/librustzcash.git?rev=0134e6c26e4d26ec646f01032f6cb900910b9317)",
  "rand 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "sapling-crypto 0.0.1 (git+https://github.com/str4d/librustzcash.git?rev=ae63116f639847e54716fbf47f19589d12038a16)",
- "zcash_primitives 0.0.0 (git+https://github.com/str4d/librustzcash.git?rev=ae63116f639847e54716fbf47f19589d12038a16)",
+ "sapling-crypto 0.0.1 (git+https://github.com/str4d/librustzcash.git?rev=0134e6c26e4d26ec646f01032f6cb900910b9317)",
+ "zcash_primitives 0.0.0 (git+https://github.com/str4d/librustzcash.git?rev=0134e6c26e4d26ec646f01032f6cb900910b9317)",
 ]
 
 [metadata]
@@ -1546,7 +1546,7 @@ dependencies = [
 "checksum backtrace-sys 0.1.28 (registry+https://github.com/rust-lang/crates.io-index)" = "797c830ac25ccc92a7f8a7b9862bde440715531514594a6154e3d4a54dd769b6"
 "checksum base64 0.9.3 (registry+https://github.com/rust-lang/crates.io-index)" = "489d6c0ed21b11d038c31b6ceccca973e65d73ba3bd8ecb9a2babf5546164643"
 "checksum bech32 0.6.0 (registry+https://github.com/rust-lang/crates.io-index)" = "58946044516aa9dc922182e0d6e9d124a31aafe6b421614654eb27cf90cec09c"
-"checksum bellman 0.1.0 (git+https://github.com/str4d/librustzcash.git?rev=ae63116f639847e54716fbf47f19589d12038a16)" = "<none>"
+"checksum bellman 0.1.0 (git+https://github.com/str4d/librustzcash.git?rev=0134e6c26e4d26ec646f01032f6cb900910b9317)" = "<none>"
 "checksum bit-vec 0.4.4 (registry+https://github.com/rust-lang/crates.io-index)" = "02b4ff8b16e6076c3e14220b39fbc1fabb6737522281a388998046859400895f"
 "checksum bitflags 1.0.4 (registry+https://github.com/rust-lang/crates.io-index)" = "228047a76f468627ca71776ecdebd732a3423081fcf5125585bcd7c49886ce12"
 "checksum blake2-rfc 0.2.18 (git+https://github.com/gtank/blake2-rfc?rev=7a5b5fc99ae483a0043db7547fb79a6fa44b88a9)" = "<none>"
@@ -1581,8 +1581,8 @@ dependencies = [
 "checksum failure 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)" = "795bd83d3abeb9220f257e597aa0080a508b27533824adf336529648f6abf7e2"
 "checksum failure_derive 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)" = "ea1063915fd7ef4309e222a5a07cf9c319fb9c7836b1f89b85458672dbb127e1"
 "checksum fake-simd 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)" = "e88a8acf291dafb59c2d96e8f59828f3838bb1a70398823ade51a84de6a6deed"
-"checksum ff 0.4.0 (git+https://github.com/str4d/librustzcash.git?rev=ae63116f639847e54716fbf47f19589d12038a16)" = "<none>"
-"checksum ff_derive 0.3.0 (git+https://github.com/str4d/librustzcash.git?rev=ae63116f639847e54716fbf47f19589d12038a16)" = "<none>"
+"checksum ff 0.4.0 (git+https://github.com/str4d/librustzcash.git?rev=0134e6c26e4d26ec646f01032f6cb900910b9317)" = "<none>"
+"checksum ff_derive 0.3.0 (git+https://github.com/str4d/librustzcash.git?rev=0134e6c26e4d26ec646f01032f6cb900910b9317)" = "<none>"
 "checksum fpe 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "ce3371c82bfbd984f624cab093f55e7336f5a6e589f8518e1258f54f011b89ad"
 "checksum fuchsia-cprng 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "81f7f8eb465745ea9b02e2704612a9946a59fa40572086c6fd49d6ddcf30bf31"
 "checksum fuchsia-zircon 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)" = "2e9763c69ebaae630ba35f74888db465e49e259ba1bc0eda7d06f4a067615d82"
@@ -1591,7 +1591,7 @@ dependencies = [
 "checksum futures-cpupool 0.1.8 (registry+https://github.com/rust-lang/crates.io-index)" = "ab90cde24b3319636588d0c35fe03b1333857621051837ed769faefb4c2162e4"
 "checksum generic-array 0.12.0 (registry+https://github.com/rust-lang/crates.io-index)" = "3c0f28c2f5bfb5960175af447a2da7c18900693738343dc896ffbcabd9839592"
 "checksum generic-array 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)" = "ef25c5683767570c2bbd7deba372926a55eaae9982d7726ee2a1050239d45b9d"
-"checksum group 0.1.0 (git+https://github.com/str4d/librustzcash.git?rev=ae63116f639847e54716fbf47f19589d12038a16)" = "<none>"
+"checksum group 0.1.0 (git+https://github.com/str4d/librustzcash.git?rev=0134e6c26e4d26ec646f01032f6cb900910b9317)" = "<none>"
 "checksum grpc 0.6.1 (registry+https://github.com/rust-lang/crates.io-index)" = "8e530ef7894a104a1c8525ce68787b3491efa2098ce5e5454e8324ea78893548"
 "checksum hex 0.3.2 (registry+https://github.com/rust-lang/crates.io-index)" = "805026a5d0141ffc30abb3be3173848ad46a1b1664fe632428479619a3644d77"
 "checksum httpbis 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)" = "7689cfa896b2a71da4f16206af167542b75d242b6906313e53857972a92d5614"
@@ -1623,7 +1623,7 @@ dependencies = [
 "checksum opaque-debug 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "d620c9c26834b34f039489ac0dfdb12c7ac15ccaf818350a64c9b5334a452ad7"
 "checksum opaque-debug 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)" = "93f5bb2e8e8dec81642920ccff6b61f1eb94fa3020c5a325c9851ff604152409"
 "checksum owning_ref 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "49a4b8ea2179e6a2e27411d3bca09ca6dd630821cf6894c6c7c8467a8ee7ef13"
-"checksum pairing 0.14.2 (git+https://github.com/str4d/librustzcash.git?rev=ae63116f639847e54716fbf47f19589d12038a16)" = "<none>"
+"checksum pairing 0.14.2 (git+https://github.com/str4d/librustzcash.git?rev=0134e6c26e4d26ec646f01032f6cb900910b9317)" = "<none>"
 "checksum parking_lot 0.7.1 (registry+https://github.com/rust-lang/crates.io-index)" = "ab41b4aed082705d1056416ae4468b6ea99d52599ecf3169b00088d43113e337"
 "checksum parking_lot_core 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "94c8c7923936b28d546dfd14d4472eaf34c99b14e1c973a32b3e6d4eb04298c9"
 "checksum pkg-config 0.3.14 (registry+https://github.com/rust-lang/crates.io-index)" = "676e8eb2b1b4c9043511a9b7bea0915320d7e502b0a079fb03f9635a5252b18c"
@@ -1650,7 +1650,7 @@ dependencies = [
 "checksum rustc_version 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)" = "138e3e0acb6c9fb258b19b67cb8abd63c00679d2851805ea151465464fe9030a"
 "checksum safemem 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)" = "8dca453248a96cb0749e36ccdfe2b0b4e54a61bfef89fb97ec621eb8e0a93dd9"
 "checksum same-file 1.0.4 (registry+https://github.com/rust-lang/crates.io-index)" = "8f20c4be53a8a1ff4c1f1b2bd14570d2f634628709752f0702ecdd2b3f9a5267"
-"checksum sapling-crypto 0.0.1 (git+https://github.com/str4d/librustzcash.git?rev=ae63116f639847e54716fbf47f19589d12038a16)" = "<none>"
+"checksum sapling-crypto 0.0.1 (git+https://github.com/str4d/librustzcash.git?rev=0134e6c26e4d26ec646f01032f6cb900910b9317)" = "<none>"
 "checksum scoped-tls 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)" = "332ffa32bf586782a3efaeb58f127980944bbc8c4d6913a86107ac2a5ab24b28"
 "checksum scopeguard 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)" = "94258f53601af11e6a49f722422f6e3425c52b06245a5cf9bc09908b174f5e27"
 "checksum semver 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)" = "1d7eb9ef2c18661902cc47e535f9bc51b78acd254da71d375c2f6720d9a40403"
@@ -1699,7 +1699,7 @@ dependencies = [
 "checksum winapi-util 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)" = "7168bab6e1daee33b4557efd0e95d5ca70a03706d39fa5f3fe7a236f584b03c9"
 "checksum winapi-x86_64-pc-windows-gnu 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
 "checksum ws2_32-sys 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)" = "d59cefebd0c892fa2dd6de581e937301d8552cb44489cdff035c6187cb63fa5e"
-"checksum zcash_client_backend 0.0.0 (git+https://github.com/str4d/librustzcash.git?rev=ae63116f639847e54716fbf47f19589d12038a16)" = "<none>"
-"checksum zcash_client_sqlite 0.0.0 (git+https://github.com/str4d/librustzcash.git?rev=ae63116f639847e54716fbf47f19589d12038a16)" = "<none>"
-"checksum zcash_primitives 0.0.0 (git+https://github.com/str4d/librustzcash.git?rev=ae63116f639847e54716fbf47f19589d12038a16)" = "<none>"
-"checksum zcash_proofs 0.0.0 (git+https://github.com/str4d/librustzcash.git?rev=ae63116f639847e54716fbf47f19589d12038a16)" = "<none>"
+"checksum zcash_client_backend 0.0.0 (git+https://github.com/str4d/librustzcash.git?rev=0134e6c26e4d26ec646f01032f6cb900910b9317)" = "<none>"
+"checksum zcash_client_sqlite 0.0.0 (git+https://github.com/str4d/librustzcash.git?rev=0134e6c26e4d26ec646f01032f6cb900910b9317)" = "<none>"
+"checksum zcash_primitives 0.0.0 (git+https://github.com/str4d/librustzcash.git?rev=0134e6c26e4d26ec646f01032f6cb900910b9317)" = "<none>"
+"checksum zcash_proofs 0.0.0 (git+https://github.com/str4d/librustzcash.git?rev=0134e6c26e4d26ec646f01032f6cb900910b9317)" = "<none>"
diff --git a/Cargo.toml b/Cargo.toml
index 0e6d0c43..eabe3712 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -22,31 +22,31 @@ protobuf = { version = "2", optional = true }
 
 [dependencies.ff]
 git = "https://github.com/str4d/librustzcash.git"
-rev = "ae63116f639847e54716fbf47f19589d12038a16"
+rev = "0134e6c26e4d26ec646f01032f6cb900910b9317"
 
 [dependencies.pairing]
 git = "https://github.com/str4d/librustzcash.git"
-rev = "ae63116f639847e54716fbf47f19589d12038a16"
+rev = "0134e6c26e4d26ec646f01032f6cb900910b9317"
 
 [dependencies.sapling-crypto]
 git = "https://github.com/str4d/librustzcash.git"
-rev = "ae63116f639847e54716fbf47f19589d12038a16"
+rev = "0134e6c26e4d26ec646f01032f6cb900910b9317"
 
 [dependencies.zcash_client_backend]
 git = "https://github.com/str4d/librustzcash.git"
-rev = "ae63116f639847e54716fbf47f19589d12038a16"
+rev = "0134e6c26e4d26ec646f01032f6cb900910b9317"
 
 [dependencies.zcash_client_sqlite]
 git = "https://github.com/str4d/librustzcash.git"
-rev = "ae63116f639847e54716fbf47f19589d12038a16"
+rev = "0134e6c26e4d26ec646f01032f6cb900910b9317"
 
 [dependencies.zcash_primitives]
 git = "https://github.com/str4d/librustzcash.git"
-rev = "ae63116f639847e54716fbf47f19589d12038a16"
+rev = "0134e6c26e4d26ec646f01032f6cb900910b9317"
 
 [dependencies.zcash_proofs]
 git = "https://github.com/str4d/librustzcash.git"
-rev = "ae63116f639847e54716fbf47f19589d12038a16"
+rev = "0134e6c26e4d26ec646f01032f6cb900910b9317"
 
 [features]
 mainnet = ["zcash_client_sqlite/mainnet"]
diff --git a/src/main/rust/lib.rs b/src/main/rust/lib.rs
index c798094a..f570f703 100644
--- a/src/main/rust/lib.rs
+++ b/src/main/rust/lib.rs
@@ -184,16 +184,13 @@ pub unsafe extern "C" fn Java_cash_z_wallet_sdk_jni_RustBackend_isValidShieldedA
         let addr = utils::java_string_to_rust(&env, addr);
 
         match RecipientAddress::from_str(&addr) {
-            Ok(Some(addr)) => match addr {
+            Some(addr) => match addr {
                 RecipientAddress::Shielded(_) => Ok(JNI_TRUE),
                 RecipientAddress::Transparent(_) => Ok(JNI_FALSE),
             }
-            Ok(None) => {
+            None => {
                 Err(format_err!("Address is for the wrong network"))
             }
-            Err(e) => {
-                Err(format_err!("Invalid address: {}", e))
-            }
         }
     });
     unwrap_exc_or(&env, res, JNI_FALSE)
@@ -209,16 +206,13 @@ pub unsafe extern "C" fn Java_cash_z_wallet_sdk_jni_RustBackend_isValidTranspare
         let addr = utils::java_string_to_rust(&env, addr);
 
         match RecipientAddress::from_str(&addr) {
-            Ok(Some(addr)) => match addr {
+            Some(addr) => match addr {
                 RecipientAddress::Shielded(_) => Ok(JNI_FALSE),
                 RecipientAddress::Transparent(_) => Ok(JNI_TRUE),
             }
-            Ok(None) => {
+            None => {
                 Err(format_err!("Address is for the wrong network"))
             }
-            Err(e) => {
-                Err(format_err!("Invalid address: {}", e))
-            }
         }
     });
     unwrap_exc_or(&env, res, JNI_FALSE)
@@ -415,13 +409,10 @@ pub unsafe extern "C" fn Java_cash_z_wallet_sdk_jni_RustBackend_sendToAddress(
         };
 
         let to = match RecipientAddress::from_str(&to) {
-            Ok(Some(to)) => to,
-            Ok(None) => {
+            Some(to) => to,
+            None => {
                 return Err(format_err!("Address is for the wrong network"));
             }
-            Err(e) => {
-                return Err(format_err!("Invalid Address: {}", e));
-            }
         };
 
         let memo = Memo::from_str(&memo);