Implement eth_estimateGas JSON RPC endpoint (#4011)

* replace chain-libs version

* implement estimate_gas function

* fic build

* fix clippy

* update chain-libs

* update

Author: Mr-Leshiy

Cargo.lock

@@ -128,9 +128,13 @@ pub fn sign_transaction(_tx: Transaction, _context: &Context) -> Result<Bytes, E
     Ok(Default::default())
 }
 
-pub fn estimate_gas(_tx: Transaction, _context: &Context) -> Result<Number, Error> {
-    // TODO implement
-    Ok(0.into())
+pub async fn estimate_gas(tx: Transaction, context: &Context) -> Result<Number, Error> {
+    let blockchain_tip = context.blockchain_tip()?.get_ref().await;
+    Ok(blockchain_tip
+        .ledger()
+        .estimate_evm_transaction(tx.into())
+        .map_err(Box::new)?
+        .into())
 }
 
 pub fn sign(_address: H160, _message: Bytes, _context: &Context) -> Result<H512, Error> {

jormungandr/src/jrpc/eth_transaction/logic.rs

@@ -85,6 +85,7 @@ pub fn eth_transaction_module(context: ContextLock) -> RpcModule<ContextLock> {
             let context = context.read().await;
             let tx = params.parse()?;
             logic::estimate_gas(tx, &context)
+                .await
                 .map_err(|err| jsonrpsee_core::Error::Custom(err.to_string()))
         })
         .unwrap();

jormungandr/src/jrpc/eth_transaction/mod.rs

@@ -17,6 +17,7 @@ use crate::{
     context::ContextLock,
     intercom::{self, TransactionMsg},
 };
+use chain_impl_mockchain::ledger::Error as LedgerError;
 use futures::channel::mpsc::TrySendError;
 use jormungandr_lib::interfaces::FragmentsProcessingSummary;
 use jsonrpsee_http_server::{HttpServerBuilder, RpcModule};
@@ -41,6 +42,8 @@ pub enum Error {
     AccountLedgerError(#[from] chain_impl_mockchain::account::LedgerError),
     #[error(transparent)]
     TxMsgSendError(#[from] Box<TrySendError<TransactionMsg>>),
+    #[error("Can not estimate gas fees transaction, error: {0}")]
+    EstimationError(#[from] Box<LedgerError>),
     #[error("Could not process fragment")]
     Fragment(FragmentsProcessingSummary),
     #[error("Cound not decode Ethereum transaction bytes, erorr: {0}")]