From 2df32e0ee0045caba533cc62026b0f9579719f4c Mon Sep 17 00:00:00 2001
From: Kris Nuttycombe <kris@nutty.land>
Date: Mon, 14 Oct 2024 10:13:11 -0600
Subject: [PATCH] zcash_keys: Add a test for parsing a problematic mainnet
 address.

---
 Cargo.lock                 |  1 +
 zcash_keys/Cargo.toml      |  1 +
 zcash_keys/src/encoding.rs | 17 +++++++++++++++--
 3 files changed, 17 insertions(+), 2 deletions(-)

diff --git a/Cargo.lock b/Cargo.lock
index 6d81ef639d..dc20e975e6 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -5985,6 +5985,7 @@ dependencies = [
 name = "zcash_keys"
 version = "0.4.0"
 dependencies = [
+ "assert_matches",
  "bech32",
  "bip32",
  "blake2b_simd",
diff --git a/zcash_keys/Cargo.toml b/zcash_keys/Cargo.toml
index 5f1f5382a9..45f7e9e040 100644
--- a/zcash_keys/Cargo.toml
+++ b/zcash_keys/Cargo.toml
@@ -67,6 +67,7 @@ byteorder = { workspace = true, optional = true }
 blake2b_simd = { workspace = true }
 
 [dev-dependencies]
+assert_matches.workspace = true
 hex.workspace = true
 jubjub.workspace = true
 proptest.workspace = true
diff --git a/zcash_keys/src/encoding.rs b/zcash_keys/src/encoding.rs
index cb31b625a8..6f61b0938b 100644
--- a/zcash_keys/src/encoding.rs
+++ b/zcash_keys/src/encoding.rs
@@ -517,13 +517,16 @@ pub fn decode_transparent_address(
 #[cfg(test)]
 #[cfg(feature = "sapling")]
 mod tests_sapling {
+    use assert_matches::assert_matches;
+    use zcash_protocol::consensus::Network;
+
     use super::{
         decode_extended_full_viewing_key, decode_extended_spending_key, decode_payment_address,
         encode_extended_full_viewing_key, encode_extended_spending_key, encode_payment_address,
-        Bech32DecodeError,
+        AddressCodec, Bech32DecodeError,
     };
     use sapling::{zip32::ExtendedSpendingKey, PaymentAddress};
-    use zcash_primitives::constants;
+    use zcash_primitives::{constants, legacy::TransparentAddress};
 
     #[test]
     fn extended_spending_key() {
@@ -689,4 +692,14 @@ mod tests_sapling {
             Err(Bech32DecodeError::ReadError)
         );
     }
+
+    #[test]
+    fn linear_pro_278() {
+        let encoded = "t1gDxhpMTfKJCyTgUHppnEkUonrcqMVL8J8";
+
+        assert_matches!(
+            TransparentAddress::decode(&Network::MainNetwork, encoded),
+            Ok(_)
+        );
+    }
 }