feat(rpc): impl accounts handler (#1135)

crates/net/rpc/src/eth/api/mod.rs

@@ -7,7 +7,7 @@ use crate::eth::signer::EthSigner;
 use async_trait::async_trait;
 use reth_interfaces::Result;
 use reth_network_api::NetworkInfo;
-use reth_primitives::{ChainInfo, U64};
+use reth_primitives::{Address, ChainInfo, U64};
 use reth_provider::{BlockProvider, StateProviderFactory};
 use reth_rpc_types::Transaction;
 use reth_transaction_pool::TransactionPool;
@@ -29,6 +29,9 @@ pub trait EthApiSpec: Send + Sync {
 
     /// Returns client chain info
     fn chain_info(&self) -> Result<ChainInfo>;
+
+    /// Returns a list of addresses owned by client.
+    fn accounts(&self) -> Vec<Address>;
 }
 
 /// `Eth` API implementation.
@@ -93,6 +96,10 @@ where
     fn chain_info(&self) -> Result<ChainInfo> {
         self.client().chain_info()
     }
+
+    fn accounts(&self) -> Vec<Address> {
+        self.inner.signers.iter().flat_map(|s| s.accounts()).collect()
+    }
 }
 
 /// Container type `EthApi`

crates/net/rpc/src/eth/api/server.rs

@@ -42,7 +42,7 @@ where
     }
 
     async fn accounts(&self) -> Result<Vec<Address>> {
-        Err(internal_rpc_err("unimplemented"))
+        Ok(EthApiSpec::accounts(self))
     }
 
     fn block_number(&self) -> Result<U256> {