better params and return types

Author: alexytsu

.gitignore

@@ -8,3 +8,5 @@ Cargo.lock
 
 # These are backup files generated by rustfmt
 **/*.rs.bk
+
+.vscode

fil_token/Cargo.toml

@@ -13,4 +13,5 @@ fvm_ipld_amt = { version = "0.4.2", features = ["go-interop"] }
 fvm_ipld_encoding = "0.2.2"
 fvm_sdk = { version = "1.0.0" }
 fvm_shared = { version = "0.8.0" }
-serde = { version = "1.0.136", features = ["derive"] }
+serde = { version = "1.0.136", features = ["derive"] }
+serde_tuple = { version = "0.5.0" }

fil_token/src/blockstore.rs

@@ -26,6 +26,7 @@ impl fvm_ipld_blockstore::Blockstore for Blockstore {
         }
         Ok(())
     }
+
     fn put<D>(&self, code: Code, block: &Block<D>) -> Result<Cid>
     where
         D: AsRef<[u8]>,

fil_token/src/lib.rs

@@ -1,4 +1,5 @@
 pub mod blockstore;
+pub mod runtime;
 pub mod token;
 
 #[cfg(test)]

fil_token/src/runtime/mod.rs

@@ -0,0 +1 @@
+pub trait Runtime {}

fil_token/src/token/errors.rs

@@ -0,0 +1,22 @@
+use super::state::StateError;
+use fvm_ipld_hamt::Error as HamtError;
+use fvm_shared::address::Address;
+
+pub enum ActorError {
+    AddrNotFound(Address),
+    IpldState(StateError),
+    IpldHamt(HamtError),
+    Arithmetic(String),
+}
+
+impl From<StateError> for ActorError {
+    fn from(e: StateError) -> Self {
+        Self::IpldState(e)
+    }
+}
+
+impl From<HamtError> for ActorError {
+    fn from(e: HamtError) -> Self {
+        Self::IpldHamt(e)
+    }
+}