* Add RPC eth_chainId for querying the current blockchain chain ID
Currently although we can use `net_version` RPC call to get the
current network ID, there's no RPC for querying the chain ID. This
makes it impossible to determine the current actual blockchain using
the RPC. An ETH/ETC client can accidentally connect to an ETC/ETH RPC
endpoint without knowing it unless it tries to sign a transaction or
it fetch a transaction that is known to have signed with a chain
ID. This has since caused trouble for application developers, such as
MetaMask, to add multi-chain support.
The same RPC endpoint is also about to be merged for ETC's
go-ethereum: https://github.com/ethereumproject/go-ethereum/pull/336
* Add eth_chainId to js's web3 interface
* Add a mocked test for eth_chainId
* Add chainId in js's jsonrpc interfaces
* Change return type for eth_chainId to `Option<u64>`
* Change name eth_chainId to parity_chainId
* Wrong test name and missed var for rpc_parity_chain_id test
* Use U256 to return chainId and fix for master
u64 returns decimal integer, and there seems to be no type called
U64. So here I use U256 to return the hex integer.
* Fix chainID test
Before EIP155 fork number, chainID should be null.
* Change both parity_chainId and transaction::chainId to use U64
This makes it consistent that all chain ids returned are hex string.
* Fix wrong U64 serialization
* Node-health to a separate crate.
* Initialize node_health outside of dapps.
* Expose health over RPC.
* Bring back 412 and fix JS.
* Add health to workspace and tests.
* Fix compilation without default features.
* Fix borked merge.
* Revert to generics to avoid virtual calls.
* Fix node-health tests.
* Add missing trailing comma.
* First little bits for chain-selection.
* Provide RPCs and get settings through to user defaults.
* Hasty stash.
* Fix updater accidentally redownloading.
* Finish up.
* Add JS tests.
* Hypervisor should never run a binary modified before itself.
* Style.
* Help tweak.
* Fix test compile.
* Fix JS test
* Build fix for tests.
* Revert default chain name
* Another test
* Use spec name via client.
* Fix mock up.
* whitespace
[ci:skip]
* whitespace
[ci:skip]
* remove exit/restart endpoints.