openethereum/crates/rpc/src/v1/tests/eth.rs

// Copyright 2015-2020 Parity Technologies (UK) Ltd.
// This file is part of OpenEthereum.

// OpenEthereum is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.

// OpenEthereum is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.

// You should have received a copy of the GNU General Public License
// along with OpenEthereum.  If not, see <http://www.gnu.org/licenses/>.

//! rpc integration tests.
use std::{env, sync::Arc};

use accounts::AccountProvider;
use ethcore::{
    client::{BlockChainClient, ChainInfo, Client, ClientConfig, EvmTestClient, ImportBlock},
    ethereum,
    miner::Miner,
    spec::{Genesis, Spec},
    test_helpers,
    verification::{queue::kind::blocks::Unverified, VerifierType},
};
use ethereum_types::{Address, H256, U256};
use ethjson::{blockchain::BlockChain, spec::ForkSpec};
use io::IoChannel;
use miner::external::ExternalMiner;
use parity_runtime::Runtime;
use parking_lot::Mutex;
use types::ids::BlockId;

use jsonrpc_core::IoHandler;
use v1::{
    helpers::{
        dispatch::{self, FullDispatcher},
        nonce,
    },
    impls::{EthClient, EthClientOptions, SigningUnsafeClient},
    metadata::Metadata,
    tests::helpers::{Config, TestSnapshotService, TestSyncProvider},
    traits::{Eth, EthSigning},
};

fn account_provider() -> Arc<AccountProvider> {
    Arc::new(AccountProvider::transient_provider())
}

fn sync_provider() -> Arc<TestSyncProvider> {
    Arc::new(TestSyncProvider::new(Config {
        network_id: 3,
        num_peers: 120,
    }))
}

fn miner_service(spec: &Spec) -> Arc<Miner> {
    Arc::new(Miner::new_for_tests(spec, None))
}

fn snapshot_service() -> Arc<TestSnapshotService> {
    Arc::new(TestSnapshotService::new())
}

fn make_spec(chain: &BlockChain) -> Spec {
    let genesis = Genesis::from(chain.genesis());
    let mut spec = EvmTestClient::spec_from_json(&chain.network).unwrap();
    let state = chain.pre_state.clone().into();
    spec.set_genesis_state(state)
        .expect("unable to set genesis state");
    spec.overwrite_genesis_params(genesis);
    assert!(spec.is_state_root_valid());
    spec
}

struct EthTester {
    _miner: Arc<Miner>,
    _runtime: Runtime,
    _snapshot: Arc<TestSnapshotService>,
    accounts: Arc<AccountProvider>,
    client: Arc<Client>,
    handler: IoHandler<Metadata>,
}

impl EthTester {
    fn from_chain(chain: &BlockChain) -> Self {
        let tester = if ::ethjson::blockchain::Engine::NoProof == chain.engine {
            let mut config = ClientConfig::default();
            config.verifier_type = VerifierType::CanonNoSeal;
            config.check_seal = false;
            Self::from_spec_conf(make_spec(chain), config)
        } else {
            Self::from_spec(make_spec(chain))
        };

        for b in chain.blocks_rlp() {
            if let Ok(block) =
                Unverified::from_rlp(b, tester.client.engine().params().eip1559_transition)
            {
                let _ = tester.client.import_block(block);
                tester.client.flush_queue();
                tester.client.import_verified_blocks();
            }
        }

        tester.client.flush_queue();

        assert!(tester.client.chain_info().best_block_hash == chain.best_block.clone().into());
        tester
    }

    fn from_spec(spec: Spec) -> Self {
        let config = ClientConfig::default();
        Self::from_spec_conf(spec, config)
    }

    fn from_spec_conf(spec: Spec, config: ClientConfig) -> Self {
        let runtime = Runtime::with_thread_count(1);
        let account_provider = account_provider();
        let ap = account_provider.clone();
        let accounts = Arc::new(move || ap.accounts().unwrap_or_default()) as _;
        let miner_service = miner_service(&spec);
        let snapshot_service = snapshot_service();

        let client = Client::new(
            config,
            &spec,
            test_helpers::new_db(),
            miner_service.clone(),
            IoChannel::disconnected(),
        )
        .unwrap();
        let sync_provider = sync_provider();
        let external_miner = Arc::new(ExternalMiner::default());

        let eth_client = EthClient::new(
            &client,
            &snapshot_service,
            &sync_provider,
            &accounts,
            &miner_service,
            &external_miner,
            EthClientOptions {
                gas_price_percentile: 50,
                allow_experimental_rpcs: true,
                allow_missing_blocks: false,
                no_ancient_blocks: false,
            },
        );

        let reservations = Arc::new(Mutex::new(nonce::Reservations::new(runtime.executor())));

        let dispatcher =
            FullDispatcher::new(client.clone(), miner_service.clone(), reservations, 50);
        let signer = Arc::new(dispatch::Signer::new(account_provider.clone())) as _;
        let eth_sign = SigningUnsafeClient::new(&signer, dispatcher);

        let mut handler = IoHandler::default();
        handler.extend_with(eth_client.to_delegate());
        handler.extend_with(eth_sign.to_delegate());

        EthTester {
            _miner: miner_service,
            _runtime: runtime,
            _snapshot: snapshot_service,
            accounts: account_provider,
            client: client,
            handler: handler,
        }
    }
}

#[test]
fn harness_works() {
    let chain: BlockChain =
        extract_chain!("BlockchainTests/ValidBlocks/bcWalletTest/wallet2outOf3txs");
    let _ = EthTester::from_chain(&chain);
}

#[test]
fn eth_get_balance() {
    let chain = extract_chain!("BlockchainTests/ValidBlocks/bcWalletTest/wallet2outOf3txs");
    let tester = EthTester::from_chain(&chain);
    // final account state
    let req_latest = r#"{
		"jsonrpc": "2.0",
		"method": "eth_getBalance",
		"params": ["0xaaaf5374fce5edbc8e2a8697c15331677e6ebaaa", "latest"],
		"id": 1
	}"#;
    let res_latest = r#"{"jsonrpc":"2.0","result":"0x9","id":1}"#.to_owned();
    assert_eq!(
        tester.handler.handle_request_sync(req_latest).unwrap(),
        res_latest
    );

    // non-existant account
    let req_new_acc = r#"{
		"jsonrpc": "2.0",
		"method": "eth_getBalance",
		"params": ["0xaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"],
		"id": 3
	}"#;

    let res_new_acc = r#"{"jsonrpc":"2.0","result":"0x0","id":3}"#.to_owned();
    assert_eq!(
        tester.handler.handle_request_sync(req_new_acc).unwrap(),
        res_new_acc
    );
}

#[test]
fn eth_get_proof() {
    let chain = extract_chain!("BlockchainTests/ValidBlocks/bcWalletTest/wallet2outOf3txs");
    let tester = EthTester::from_chain(&chain);
    // final account state
    let req_latest = r#"{
		"jsonrpc": "2.0",
		"method": "eth_getProof",
		"params": ["0xaaaf5374fce5edbc8e2a8697c15331677e6ebaaa", [], "latest"],
		"id": 1
	}"#;

    let res_latest = r#","address":"0xaaaf5374fce5edbc8e2a8697c15331677e6ebaaa","balance":"0x9","codeHash":"0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470","nonce":"0x0","storageHash":"0x56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421","storageProof":[]},"id":1}"#.to_owned();
    assert!(tester
        .handler
        .handle_request_sync(req_latest)
        .unwrap()
        .to_string()
        .ends_with(res_latest.as_str()));

    // non-existant account
    let req_new_acc = r#"{
		"jsonrpc": "2.0",
		"method": "eth_getProof",
		"params": ["0xaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa",[],"latest"],
		"id": 3
	}"#;

    let res_new_acc = r#","address":"0xaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa","balance":"0x0","codeHash":"0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470","nonce":"0x0","storageHash":"0x56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421","storageProof":[]},"id":3}"#.to_owned();
    assert!(tester
        .handler
        .handle_request_sync(req_new_acc)
        .unwrap()
        .to_string()
        .ends_with(res_new_acc.as_str()));
}

#[test]
fn eth_block_number() {
    let chain = extract_chain!("BlockchainTests/ValidBlocks/bcGasPricerTest/RPC_API_Test");
    let tester = EthTester::from_chain(&chain);
    let req_number = r#"{
		"jsonrpc": "2.0",
		"method": "eth_blockNumber",
		"params": [],
		"id": 1
	}"#;

    let res_number = r#"{"jsonrpc":"2.0","result":"0x20","id":1}"#.to_owned();
    assert_eq!(
        tester.handler.handle_request_sync(req_number).unwrap(),
        res_number
    );
}

#[test]
fn eth_get_block() {
    let chain = extract_chain!("BlockchainTests/ValidBlocks/bcGasPricerTest/RPC_API_Test");
    let tester = EthTester::from_chain(&chain);
    let req_block =
        r#"{"method":"eth_getBlockByNumber","params":["0x0",false],"id":1,"jsonrpc":"2.0"}"#;

    let res_block = r#"{"jsonrpc":"2.0","result":{"author":"0x8888f1f195afa192cfee860698584c030f4c9db1","difficulty":"0x20000","extraData":"0x42","gasLimit":"0x1df5d44","gasUsed":"0x0","hash":"0xcded1bc807465a72e2d54697076ab858f28b15d4beaae8faa47339c8eee386a3","logsBloom":"0x00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000","miner":"0x8888f1f195afa192cfee860698584c030f4c9db1","mixHash":"0x56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421","nonce":"0x0102030405060708","number":"0x0","parentHash":"0x0000000000000000000000000000000000000000000000000000000000000000","receiptsRoot":"0x56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421","sealFields":["0xa056e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421","0x880102030405060708"],"sha3Uncles":"0x1dcc4de8dec75d7aab85b567b6ccd41ad312451b948a7413f0a142fd40d49347","size":"0x200","stateRoot":"0x7dba07d6b448a186e9612e5f737d1c909dce473e53199901a302c00646d523c1","timestamp":"0x54c98c81","totalDifficulty":"0x20000","transactions":[],"transactionsRoot":"0x56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421","uncles":[]},"id":1}"#;
    assert_eq!(
        tester.handler.handle_request_sync(req_block).unwrap(),
        res_block
    );
}

#[test]
fn eth_get_max_priority_fee_per_gas() {
    let chain = extract_non_legacy_chain!(
        "BlockchainTests/ValidBlocks/bcEIP1559/transType",
        ForkSpec::London
    );
    let tester = EthTester::from_chain(&chain);
    let request = r#"{"method":"eth_maxPriorityFeePerGas","params":[],"id":1,"jsonrpc":"2.0"}"#;

    // We are expecting for 50-th percentile of the previous 100 blocks transactions priority fees.
    //
    // Sorted priority fees: 0x64 0x64 0x64 0x7d 0x7d 0xea 0x149.
    // Currently, the way 50-th percentile is calculated, the 3rd fee would be the result.
    let response = r#"{"jsonrpc":"2.0","result":"0x64","id":1}"#;
    assert_eq!(
        tester.handler.handle_request_sync(request).unwrap(),
        response
    )
}

#[test]
fn eth_get_block_by_hash() {
    let chain = extract_chain!("BlockchainTests/ValidBlocks/bcGasPricerTest/RPC_API_Test");
    let tester = EthTester::from_chain(&chain);

    // We're looking for block number 4 from "RPC_API_Test_Frontier"
    let req_block = r#"{"method":"eth_getBlockByHash","params":["0x088987877b431b8156c79c4b1c9543a8747531e5acaebca8f5d516cb3b35b0f2",false],"id":1,"jsonrpc":"2.0"}"#;

    let res_block = r#"{"jsonrpc":"2.0","result":{"author":"0x8888f1f195afa192cfee860698584c030f4c9db1","difficulty":"0x200c0","extraData":"0x","gasLimit":"0x1dd7ea0","gasUsed":"0x5458","hash":"0x088987877b431b8156c79c4b1c9543a8747531e5acaebca8f5d516cb3b35b0f2","logsBloom":"0x00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000","miner":"0x8888f1f195afa192cfee860698584c030f4c9db1","mixHash":"0xeb709bc3b92c8f28ffa3d4ad7558689316cfbf599ac9541d9f3e79d31b0b9af6","nonce":"0x6ab72973b649825d","number":"0x4","parentHash":"0x095303ee87197430f9bf30ecd09735a11ab78db59abf67a36d4ada73f96800b9","receiptsRoot":"0x7ed8026cf72ed0e98e6fd53ab406e51ffd34397d9da0052494ff41376fda7b5f","sealFields":["0xa0eb709bc3b92c8f28ffa3d4ad7558689316cfbf599ac9541d9f3e79d31b0b9af6","0x886ab72973b649825d"],"sha3Uncles":"0xb9cf7d3adde9f960e6c2510c1a7d35e94223db71277463ef8dc94f8afbe44403","size":"0x661","stateRoot":"0x68805721294e365020aca15ed56c360d9dc2cf03cbeff84c9b84b8aed023bfb5","timestamp":"0x5db6f5a1","totalDifficulty":"0xa0180","transactions":["0xb094b9dc356dbb8b256402c6d5709288066ad6a372c90c9c516f14277545fd58"],"transactionsRoot":"0x97a593d8d7e15b57f5c6bb25bc6c325463ef99f874bc08a78656c3ab5cb23262","uncles":["0xffa20f3c2eafd8a4def16b2742e576280282c1476a8307ac6ff5a8a1eac99cdf","0x67faba5ff44f91127c12823a820ab5456252afa3397d08b2781fe308fb1c8359"]},"id":1}"#;
    assert_eq!(
        tester.handler.handle_request_sync(req_block).unwrap(),
        res_block
    );
}

// a frontier-like test with an expanded gas limit and balance on known account.
const TRANSACTION_COUNT_SPEC: &'static [u8] = br#"{
	"name": "Frontier (Test)",
	"engine": {
		"Ethash": {
			"params": {
				"minimumDifficulty": "0x020000",
				"difficultyBoundDivisor": "0x0800",
				"blockReward": "0x4563918244F40000",
				"durationLimit": "0x0d",
				"homesteadTransition": "0xffffffffffffffff",
				"daoHardforkTransition": "0xffffffffffffffff",
				"daoHardforkBeneficiary": "0x0000000000000000000000000000000000000000",
				"daoHardforkAccounts": []
			}
		}
	},
	"params": {
		"gasLimitBoundDivisor": "0x0400",
		"registrar" : "0xc6d9d2cd449a754c494264e1809c50e34d64562b",
		"accountStartNonce": "0x00",
		"maximumExtraDataSize": "0x20",
		"minGasLimit": "0x50000",
		"networkID" : "0x1"
	},
	"genesis": {
		"seal": {
			"ethereum": {
				"nonce": "0x0000000000000042",
				"mixHash": "0x0000000000000000000000000000000000000000000000000000000000000000"
			}
		},
		"difficulty": "0x400000000",
		"author": "0x0000000000000000000000000000000000000000",
		"timestamp": "0x00",
		"parentHash": "0x0000000000000000000000000000000000000000000000000000000000000000",
		"extraData": "0x11bbe8db4e347b4e8c937c1c8370e4b5ed33adb3db69cbdb7a38e1e50b1b82fa",
		"gasLimit": "0x50000"
	},
	"accounts": {
		"0000000000000000000000000000000000000001": { "builtin": { "name": "ecrecover", "pricing": { "linear": { "base": 3000, "word": 0 } } } },
		"0000000000000000000000000000000000000002": { "builtin": { "name": "sha256", "pricing": { "linear": { "base": 60, "word": 12 } } } },
		"0000000000000000000000000000000000000003": { "builtin": { "name": "ripemd160", "pricing": { "linear": { "base": 600, "word": 120 } } } },
		"0000000000000000000000000000000000000004": { "builtin": { "name": "identity", "pricing": { "linear": { "base": 15, "word": 3 } } } },
		"faa34835af5c2ea724333018a515fbb7d5bc0b33": { "balance": "10000000000000", "nonce": "0" }
	}
}
"#;

const POSITIVE_NONCE_SPEC: &'static [u8] = br#"{
	"name": "Frontier (Test)",
	"engine": {
		"Ethash": {
			"params": {
				"minimumDifficulty": "0x020000",
				"difficultyBoundDivisor": "0x0800",
				"blockReward": "0x4563918244F40000",
				"durationLimit": "0x0d",
				"homesteadTransition": "0xffffffffffffffff",
				"daoHardforkTransition": "0xffffffffffffffff",
				"daoHardforkBeneficiary": "0x0000000000000000000000000000000000000000",
				"daoHardforkAccounts": []
			}
		}
	},
	"params": {
		"gasLimitBoundDivisor": "0x0400",
		"registrar" : "0xc6d9d2cd449a754c494264e1809c50e34d64562b",
		"accountStartNonce": "0x0100",
		"maximumExtraDataSize": "0x20",
		"minGasLimit": "0x50000",
		"networkID" : "0x1"
	},
	"genesis": {
		"seal": {
			"ethereum": {
				"nonce": "0x0000000000000042",
				"mixHash": "0x0000000000000000000000000000000000000000000000000000000000000000"
			}
		},
		"difficulty": "0x400000000",
		"author": "0x0000000000000000000000000000000000000000",
		"timestamp": "0x00",
		"parentHash": "0x0000000000000000000000000000000000000000000000000000000000000000",
		"extraData": "0x11bbe8db4e347b4e8c937c1c8370e4b5ed33adb3db69cbdb7a38e1e50b1b82fa",
		"gasLimit": "0x50000"
	},
	"accounts": {
		"0000000000000000000000000000000000000001": { "builtin": { "name": "ecrecover", "pricing": { "linear": { "base": 3000, "word": 0 } } } },
		"0000000000000000000000000000000000000002": { "builtin": { "name": "sha256", "pricing": { "linear": { "base": 60, "word": 12 } } } },
		"0000000000000000000000000000000000000003": { "builtin": { "name": "ripemd160", "pricing": { "linear": { "base": 600, "word": 120 } } } },
		"0000000000000000000000000000000000000004": { "builtin": { "name": "identity", "pricing": { "linear": { "base": 15, "word": 3 } } } },
		"faa34835af5c2ea724333018a515fbb7d5bc0b33": { "balance": "10000000000000", "nonce": "0" }
	}
}
"#;

#[test]
fn eth_transaction_count() {
    let secret = "8a283037bb19c4fed7b1c569e40c7dcff366165eb869110a1b11532963eb9cb2"
        .parse()
        .unwrap();
    let tester = EthTester::from_spec(
        Spec::load(&env::temp_dir(), TRANSACTION_COUNT_SPEC).expect("invalid chain spec"),
    );
    let address = tester.accounts.insert_account(secret, &"".into()).unwrap();
    tester
        .accounts
        .unlock_account_permanently(address, "".into())
        .unwrap();

    let req_before = r#"{
		"jsonrpc": "2.0",
		"method": "eth_getTransactionCount",
		"params": [""#
        .to_owned()
        + format!("0x{:x}", address).as_ref()
        + r#"", "latest"],
		"id": 15
	}"#;

    let res_before = r#"{"jsonrpc":"2.0","result":"0x0","id":15}"#;

    assert_eq!(
        tester.handler.handle_request_sync(&req_before).unwrap(),
        res_before
    );

    let req_send_trans = r#"{
		"jsonrpc": "2.0",
		"method": "eth_sendTransaction",
		"params": [{
			"from": ""#
        .to_owned()
        + format!("0x{:x}", address).as_ref()
        + r#"",
			"to": "0xd46e8dd67c5d32be8058bb8eb970870f07244567",
			"gas": "0x30000",
			"gasPrice": "0x1",
			"value": "0x9184e72a"
		}],
		"id": 16
	}"#;

    // dispatch the transaction.
    tester.handler.handle_request_sync(&req_send_trans).unwrap();

    // we have submitted the transaction -- but this shouldn't be reflected in a "latest" query.
    let req_after_latest = r#"{
		"jsonrpc": "2.0",
		"method": "eth_getTransactionCount",
		"params": [""#
        .to_owned()
        + format!("0x{:x}", address).as_ref()
        + r#"", "latest"],
		"id": 17
	}"#;

    let res_after_latest = r#"{"jsonrpc":"2.0","result":"0x0","id":17}"#;

    assert_eq!(
        &tester
            .handler
            .handle_request_sync(&req_after_latest)
            .unwrap(),
        res_after_latest
    );

    // the pending transactions should have been updated.
    let req_after_pending = r#"{
		"jsonrpc": "2.0",
		"method": "eth_getTransactionCount",
		"params": [""#
        .to_owned()
        + format!("0x{:x}", address).as_ref()
        + r#"", "pending"],
		"id": 18
	}"#;

    let res_after_pending = r#"{"jsonrpc":"2.0","result":"0x1","id":18}"#;

    assert_eq!(
        &tester
            .handler
            .handle_request_sync(&req_after_pending)
            .unwrap(),
        res_after_pending
    );
}

fn verify_transaction_counts(name: String, chain: BlockChain) {
    struct PanicHandler(String);
    impl Drop for PanicHandler {
        fn drop(&mut self) {
            if ::std::thread::panicking() {
                println!("Test failed: {}", self.0);
            }
        }
    }

    let _panic = PanicHandler(name);

    fn by_hash(hash: H256, count: usize, id: &mut usize) -> (String, String) {
        let req = r#"{
			"jsonrpc": "2.0",
			"method": "eth_getBlockTransactionCountByHash",
			"params": [
				""#
        .to_owned()
            + format!("0x{:x}", hash).as_ref()
            + r#""
			],
			"id": "# + format!("{}", *id).as_ref()
            + r#"
		}"#;

        let res = r#"{"jsonrpc":"2.0","result":""#.to_owned()
            + format!("0x{:x}", count).as_ref()
            + r#"","id":"#
            + format!("{}", *id).as_ref()
            + r#"}"#;
        *id += 1;
        (req, res)
    }

    fn by_number(num: u64, count: usize, id: &mut usize) -> (String, String) {
        let req = r#"{
			"jsonrpc": "2.0",
			"method": "eth_getBlockTransactionCountByNumber",
			"params": [
				"#
        .to_owned()
            + &::serde_json::to_string(&U256::from(num)).unwrap()
            + r#"
			],
			"id": "# + format!("{}", *id).as_ref()
            + r#"
		}"#;

        let res = r#"{"jsonrpc":"2.0","result":""#.to_owned()
            + format!("0x{:x}", count).as_ref()
            + r#"","id":"#
            + format!("{}", *id).as_ref()
            + r#"}"#;
        *id += 1;
        (req, res)
    }

    let tester = EthTester::from_chain(&chain);

    let mut id = 1;
    for b in chain.blocks_rlp().into_iter().filter_map(|b| {
        Unverified::from_rlp(b, tester.client.engine().params().eip1559_transition).ok()
    }) {
        let count = b.transactions.len();

        let hash = b.header.hash();
        let number = b.header.number();

        let (req, res) = by_hash(hash, count, &mut id);
        assert_eq!(tester.handler.handle_request_sync(&req), Some(res));

        // uncles can share block numbers, so skip them.
        if tester.client.block_hash(BlockId::Number(number)) == Some(hash) {
            let (req, res) = by_number(number, count, &mut id);
            assert_eq!(tester.handler.handle_request_sync(&req), Some(res));
        }
    }
}

#[test]
fn starting_nonce_test() {
    let tester = EthTester::from_spec(
        Spec::load(&env::temp_dir(), POSITIVE_NONCE_SPEC).expect("invalid chain spec"),
    );
    let address = Address::from_low_u64_be(10);

    let sample = tester
        .handler
        .handle_request_sync(
            &(r#"
		{
			"jsonrpc": "2.0",
			"method": "eth_getTransactionCount",
			"params": [""#
                .to_owned()
                + format!("0x{:x}", address).as_ref()
                + r#"", "latest"],
			"id": 15
		}
		"#),
        )
        .unwrap();

    assert_eq!(r#"{"jsonrpc":"2.0","result":"0x100","id":15}"#, &sample);
}

register_test!(
    eth_transaction_count_1,
    verify_transaction_counts,
    "BlockchainTests/ValidBlocks/bcWalletTest/wallet2outOf3txs"
);
register_test!(
    eth_transaction_count_2,
    verify_transaction_counts,
    "BlockchainTests/ValidBlocks/bcTotalDifficultyTest/sideChainWithMoreTransactions"
);
register_test!(
    eth_transaction_count_3,
    verify_transaction_counts,
    "BlockchainTests/ValidBlocks/bcGasPricerTest/RPC_API_Test"
);