feat: support eth_sendRawTransactionConditional

ethers-core/src/types/transaction/conditional.rs

@@ -0,0 +1,35 @@
+use crate::types::{Address, BlockNumber, H256};
+use serde::{Deserialize, Serialize};
+use std::collections::HashMap;
+
+/// Extra options parameter for `eth_sendRawTransactionConditional`
+#[derive(Debug, Clone, Default, PartialEq, Eq, Serialize, Deserialize)]
+pub struct ConditionalOptions {
+    /// A map of accounts with expected storage
+    #[serde(rename = "knownAccounts")]
+    pub known_accounts: HashMap<Address, AccountStorage>,
+
+    /// Minimal block number for inclusion
+    #[serde(rename = "blockNumberMin", skip_serializing_if = "Option::is_none")]
+    pub block_number_min: Option<BlockNumber>,
+
+    /// Maximum block number for inclusion
+    #[serde(rename = "blockNumberMax", skip_serializing_if = "Option::is_none")]
+    pub block_number_max: Option<BlockNumber>,
+
+    /// Minimal block timestamp for inclusion
+    #[serde(rename = "timestampMin", skip_serializing_if = "Option::is_none")]
+    pub timestamp_min: Option<u64>,
+
+    /// Maximum block timestamp for inclusion
+    #[serde(rename = "timestampMax", skip_serializing_if = "Option::is_none")]
+    pub timestamp_max: Option<u64>,
+}
+
+/// Account storage
+#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
+#[serde(untagged)]
+pub enum AccountStorage {
+    RootHash(H256),
+    SlotValues(HashMap<String, String>),
+}

ethers-core/src/types/transaction/mod.rs

@@ -5,6 +5,8 @@ pub mod eip1559;
 pub mod eip2718;
 pub mod eip2930;
 
+pub mod conditional;
+
 #[cfg(feature = "optimism")]
 pub mod optimism;
 

ethers-middleware/src/signer.rs

@@ -132,7 +132,7 @@ where
     /// If the transaction does not have a chain id set, it sets it to the signer's chain id.
     /// Returns an error if the transaction's existing chain id does not match the signer's chain
     /// id.
-    async fn sign_transaction(
+    pub async fn sign_transaction(
         &self,
         mut tx: TypedTransaction,
     ) -> Result<Bytes, SignerMiddlewareError<M, S>> {

ethers-providers/src/middleware.rs

@@ -1,7 +1,9 @@
 use async_trait::async_trait;
 use auto_impl::auto_impl;
 use ethers_core::types::{
-    transaction::{eip2718::TypedTransaction, eip2930::AccessListWithGasUsed},
+    transaction::{
+        conditional::ConditionalOptions, eip2718::TypedTransaction, eip2930::AccessListWithGasUsed,
+    },
     *,
 };
 use futures_util::future::join_all;
@@ -460,6 +462,20 @@ pub trait Middleware: Sync + Send + Debug {
         self.inner().send_raw_transaction(tx).await.map_err(MiddlewareError::from_err)
     }
 
+    /// Send the raw RLP encoded transaction to the entire Ethereum network with conditional options
+    /// and returns the transaction's hash This will consume gas from the account that signed the
+    /// transaction. <https://notes.ethereum.org/@yoav/SkaX2lS9j#>
+    async fn send_raw_transaction_conditional<'a>(
+        &'a self,
+        tx: Bytes,
+        options: ConditionalOptions,
+    ) -> Result<PendingTransaction<'a, Self::Provider>, Self::Error> {
+        self.inner()
+            .send_raw_transaction_conditional(tx, options)
+            .await
+            .map_err(MiddlewareError::from_err)
+    }
+
     /// This returns true if either the middleware stack contains a `SignerMiddleware`, or the
     /// JSON-RPC provider has an unlocked key that can sign using the `eth_sign` call. If none of
     /// the above conditions are met, then the middleware stack is not capable of signing data.

ethers-providers/src/rpc/provider.rs

@@ -1,5 +1,3 @@
-use ethers_core::types::SyncingStatus;
-
 use crate::{
     call_raw::CallBuilder,
     errors::ProviderError,
@@ -22,11 +20,14 @@ use async_trait::async_trait;
 use ethers_core::{
     abi::{self, Detokenize, ParamType},
     types::{
-        transaction::{eip2718::TypedTransaction, eip2930::AccessListWithGasUsed},
+        transaction::{
+            conditional::ConditionalOptions, eip2718::TypedTransaction,
+            eip2930::AccessListWithGasUsed,
+        },
         Address, Block, BlockId, BlockNumber, BlockTrace, Bytes, Chain, EIP1186ProofResponse,
         FeeHistory, Filter, FilterBlockOption, GethDebugTracingCallOptions,
-        GethDebugTracingOptions, GethTrace, Log, NameOrAddress, Selector, Signature, Trace,
-        TraceFilter, TraceType, Transaction, TransactionReceipt, TransactionRequest, TxHash,
+        GethDebugTracingOptions, GethTrace, Log, NameOrAddress, Selector, Signature, SyncingStatus,
+        Trace, TraceFilter, TraceType, Transaction, TransactionReceipt, TransactionRequest, TxHash,
         TxpoolContent, TxpoolInspect, TxpoolStatus, H256, U256, U64,
     },
     utils,
@@ -581,6 +582,17 @@ impl<P: JsonRpcClient> Middleware for Provider<P> {
         Ok(PendingTransaction::new(tx_hash, self))
     }
 
+    async fn send_raw_transaction_conditional<'a>(
+        &'a self,
+        tx: Bytes,
+        options: ConditionalOptions,
+    ) -> Result<PendingTransaction<'a, P>, ProviderError> {
+        let rlp = utils::serialize(&tx);
+        let options = utils::serialize(&options);
+        let tx_hash = self.request("eth_sendRawTransactionConditional", [rlp, options]).await?;
+        Ok(PendingTransaction::new(tx_hash, self))
+    }
+
     async fn is_signer(&self) -> bool {
         match self.from {
             Some(sender) => self.sign(vec![], &sender).await.is_ok(),

examples/README.md

@@ -66,6 +66,7 @@
   - [x] Remove liquidity
   - [ ] Set gas for a transaction
   - [ ] Send raw transaction
+  - [x] Send raw transaction conditional
   - [ ] Send typed transaction
   - [x] Trace
   - [ ] Transaction receipt

examples/transactions/examples/send_raw_conditional.rs

@@ -0,0 +1,51 @@
+use ethers::{
+    middleware::SignerMiddleware,
+    providers::{Http, Middleware, Provider},
+    signers::{LocalWallet, Signer},
+    types::{transaction::conditional::ConditionalOptions, BlockNumber, TransactionRequest},
+};
+use eyre::Result;
+
+/// Use 'eth_sendRawTransactionConditional' to send a transaction with a conditional options
+/// requires, a valid endpoint in `RPC_URL` env var that supports
+/// `eth_sendRawTransactionConditional`
+#[tokio::main]
+async fn main() -> Result<()> {
+    if let Ok(url) = std::env::var("RPC_URL") {
+        let provider = Provider::<Http>::try_from(url)?;
+        let chain_id = provider.get_chainid().await?;
+        let wallet: LocalWallet =
+            "380eb0f3d505f087e438eca80bc4df9a7faa24f868e69fc0440261a0fc0567dc".parse()?;
+        let from = wallet.address();
+
+        let client = SignerMiddleware::new(provider, wallet.with_chain_id(chain_id.as_u64()));
+
+        let mut tx = TransactionRequest::default()
+            .from(from)
+            .to("0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045")
+            .value(100)
+            .into();
+
+        client.fill_transaction(&mut tx, None).await.unwrap();
+
+        let signed_tx = client.sign_transaction(tx).await.unwrap();
+        let pending_tx = client
+            .send_raw_transaction_conditional(
+                signed_tx,
+                ConditionalOptions {
+                    block_number_min: Some(BlockNumber::from(33285900)),
+                    ..Default::default()
+                },
+            )
+            .await
+            .unwrap();
+
+        let receipt = pending_tx.await?.ok_or_else(|| eyre::eyre!("tx not included"))?;
+        let tx = client.get_transaction(receipt.transaction_hash).await?;
+
+        println!("Sent transaction: {}\n", serde_json::to_string(&tx)?);
+        println!("Receipt: {}\n", serde_json::to_string(&receipt)?);
+    }
+
+    Ok(())
+}