Migrate chain.rs to snafu error (#3904)

Author: cryptoni9n

src/chain.rs

@@ -66,11 +66,8 @@ impl Chain {
     }
   }
 
-  pub(crate) fn address_from_script(
-    self,
-    script: &Script,
-  ) -> Result<Address, bitcoin::address::Error> {
-    Address::from_script(script, self.network())
+  pub(crate) fn address_from_script(self, script: &Script) -> Result<Address, SnafuError> {
+    Address::from_script(script, self.network()).snafu_context(error::AddressConversion)
   }
 
   pub(crate) fn join_with_data_dir(self, data_dir: impl AsRef<Path>) -> PathBuf {
@@ -110,15 +107,17 @@ impl Display for Chain {
 }
 
 impl FromStr for Chain {
-  type Err = Error;
+  type Err = SnafuError;
 
   fn from_str(s: &str) -> Result<Self, Self::Err> {
     match s {
       "mainnet" => Ok(Self::Mainnet),
       "regtest" => Ok(Self::Regtest),
       "signet" => Ok(Self::Signet),
       "testnet" => Ok(Self::Testnet),
-      _ => bail!("invalid chain `{s}`"),
+      _ => Err(SnafuError::InvalidChain {
+        chain: s.to_string(),
+      }),
     }
   }
 }
@@ -135,7 +134,7 @@ mod tests {
     assert_eq!("testnet".parse::<Chain>().unwrap(), Chain::Testnet);
     assert_eq!(
       "foo".parse::<Chain>().unwrap_err().to_string(),
-      "invalid chain `foo`"
+      "Invalid chain `foo`"
     );
   }
 }