Add getProof to provider (#459)

* Add getProof to provider

* Format updates

* Add docs

* Remove fill_tx method, not sure how it got there

* Fix removed Trace type

* Remove test, eth_getProof not supported by ganache

ethers-core/src/types/mod.rs

@@ -47,3 +47,6 @@ pub use txpool::*;
 
 mod trace;
 pub use trace::*;
+
+mod proof;
+pub use proof::*;

ethers-core/src/types/proof.rs

@@ -0,0 +1,19 @@
+use crate::types::{Bytes, H256, U256};
+use serde::{Deserialize, Serialize};
+
+#[derive(Debug, Default, Clone, PartialEq, Deserialize, Serialize)]
+pub struct StorageProof {
+    pub key: H256,
+    pub proof: Vec<Bytes>,
+    pub value: U256,
+}
+
+#[derive(Debug, Default, Clone, PartialEq, Deserialize, Serialize)]
+pub struct EIP1186ProofResponse {
+    balance: U256,
+    code_hash: H256,
+    nonce: U256,
+    storage_hash: H256,
+    account_proof: Vec<Bytes>,
+    storage_proof: Vec<StorageProof>,
+}

ethers-providers/src/lib.rs

@@ -548,6 +548,18 @@ pub trait Middleware: Sync + Send + Debug {
             .map_err(FromErr::from)
     }
 
+    async fn get_proof<T: Into<NameOrAddress> + Send + Sync>(
+        &self,
+        from: T,
+        locations: Vec<H256>,
+        block: Option<BlockId>,
+    ) -> Result<EIP1186ProofResponse, Self::Error> {
+        self.inner()
+            .get_proof(from, locations, block)
+            .await
+            .map_err(FromErr::from)
+    }
+
     // Mempool inspection for Geth's API
 
     async fn txpool_content(&self) -> Result<TxpoolContent, Self::Error> {

ethers-providers/src/provider.rs

@@ -10,13 +10,12 @@ use ethers_core::{
     abi::{self, Detokenize, ParamType},
     types::{
         transaction::{eip2718::TypedTransaction, eip2930::AccessListWithGasUsed},
-        Address, Block, BlockId, BlockNumber, BlockTrace, Bytes, Filter, Log, NameOrAddress,
-        Selector, Signature, Trace, TraceFilter, TraceType, Transaction, TransactionReceipt,
-        TxHash, TxpoolContent, TxpoolInspect, TxpoolStatus, H256, U256, U64,
+        Address, Block, BlockId, BlockNumber, BlockTrace, Bytes, EIP1186ProofResponse, Filter, Log,
+        NameOrAddress, Selector, Signature, Trace, TraceFilter, TraceType, Transaction,
+        TransactionReceipt, TxHash, TxpoolContent, TxpoolInspect, TxpoolStatus, H256, U256, U64,
     },
     utils,
 };
-
 #[cfg(feature = "celo")]
 use crate::CeloMiddleware;
 use crate::Middleware;
@@ -582,6 +581,29 @@ impl<P: JsonRpcClient> Middleware for Provider<P> {
         self.request("eth_getCode", [at, block]).await
     }
 
+    /// Returns the EIP-1186 proof response
+    /// https://github.com/ethereum/EIPs/issues/1186
+    async fn get_proof<T: Into<NameOrAddress> + Send + Sync>(
+        &self,
+        from: T,
+        locations: Vec<H256>,
+        block: Option<BlockId>,
+    ) -> Result<EIP1186ProofResponse, ProviderError> {
+        let from = match from.into() {
+            NameOrAddress::Name(ens_name) => self.resolve_name(&ens_name).await?,
+            NameOrAddress::Address(addr) => addr,
+        };
+
+        let from = utils::serialize(&from);
+        let locations = locations
+            .iter()
+            .map(|location| utils::serialize(&location))
+            .collect();
+        let block = utils::serialize(&block.unwrap_or_else(|| BlockNumber::Latest.into()));
+
+        self.request("eth_getProof", [from, locations, block]).await
+    }
+
     ////// Ethereum Naming Service
     // The Ethereum Naming Service (ENS) allows easy to remember and use names to
     // be assigned to Ethereum addresses. Any provider operation which takes an address

ethers-providers/src/transports/quorum.rs

@@ -171,6 +171,7 @@ impl<T: JsonRpcClientWrapper> QuorumProvider<T> {
             | "eth_createAccessList"
             | "eth_getStorageAt"
             | "eth_getCode"
+            | "eth_getProof"
             | "trace_call"
             | "trace_block" => {
                 // calls that include the block number in the params at the last index of json array