actor_name_by_code (#1218)

Co-authored-by: /raw PONG _GHMoaCXLT <58883403+q9f@users.noreply.github.com>

vm/actor/src/builtin/codes.rs

@@ -3,6 +3,19 @@
 
 use cid::{multihash::MultihashDigest, Cid, Code::Identity, RAW};
 
+pub const SYSTEM_ACTOR_CODE_ID_NAME: &str = "fil/4/system";
+pub const INIT_ACTOR_CODE_ID_NAME: &str = "fil/4/init";
+pub const CRON_ACTOR_CODE_ID_NAME: &str = "fil/4/cron";
+pub const ACCOUNT_ACTOR_CODE_ID_NAME: &str = "fil/4/account";
+pub const POWER_ACTOR_CODE_ID_NAME: &str = "fil/4/storagepower";
+pub const MINER_ACTOR_CODE_ID_NAME: &str = "fil/4/storageminer";
+pub const MARKET_ACTOR_CODE_ID_NAME: &str = "fil/4/storagemarket";
+pub const PAYCH_ACTOR_CODE_ID_NAME: &str = "fil/4/paymentchannel";
+pub const MULTISIG_ACTOR_CODE_ID_NAME: &str = "fil/4/multisig";
+pub const REWARD_ACTOR_CODE_ID_NAME: &str = "fil/4/reward";
+pub const VERIFREG_ACTOR_CODE_ID_NAME: &str = "fil/4/verifiedregistry";
+pub const CHAOS_ACTOR_CODE_ID_NAME: &str = "fil/4/chaos";
+
 lazy_static! {
     pub static ref SYSTEM_ACTOR_CODE_ID: Cid = make_builtin(b"fil/5/system");
     pub static ref INIT_ACTOR_CODE_ID: Cid = make_builtin(b"fil/5/init");
@@ -61,3 +74,22 @@ pub fn is_account_actor(code: &Cid) -> bool {
 pub fn is_principal(code: &Cid) -> bool {
     CALLER_TYPES_SIGNABLE.iter().any(|c| c == code)
 }
+
+/// Given an actor code Cid, returns the name of the actor.
+pub fn actor_name_by_code(code: &Cid) -> Result<&str, String> {
+    match code {
+        x if x == &*SYSTEM_ACTOR_CODE_ID => Ok(SYSTEM_ACTOR_CODE_ID_NAME),
+        x if x == &*INIT_ACTOR_CODE_ID => Ok(INIT_ACTOR_CODE_ID_NAME),
+        x if x == &*CRON_ACTOR_CODE_ID => Ok(CRON_ACTOR_CODE_ID_NAME),
+        x if x == &*ACCOUNT_ACTOR_CODE_ID => Ok(ACCOUNT_ACTOR_CODE_ID_NAME),
+        x if x == &*POWER_ACTOR_CODE_ID => Ok(POWER_ACTOR_CODE_ID_NAME),
+        x if x == &*MINER_ACTOR_CODE_ID => Ok(MINER_ACTOR_CODE_ID_NAME),
+        x if x == &*MARKET_ACTOR_CODE_ID => Ok(MARKET_ACTOR_CODE_ID_NAME),
+        x if x == &*PAYCH_ACTOR_CODE_ID => Ok(PAYCH_ACTOR_CODE_ID_NAME),
+        x if x == &*MULTISIG_ACTOR_CODE_ID => Ok(MULTISIG_ACTOR_CODE_ID_NAME),
+        x if x == &*REWARD_ACTOR_CODE_ID => Ok(REWARD_ACTOR_CODE_ID_NAME),
+        x if x == &*VERIFREG_ACTOR_CODE_ID => Ok(VERIFREG_ACTOR_CODE_ID_NAME),
+        x if x == &*CHAOS_ACTOR_CODE_ID => Ok(CHAOS_ACTOR_CODE_ID_NAME),
+        _ => Err(format!("{} is not a valid code", code)),
+    }
+}