implement provider.api.rpc.engine.createBlock

[shunjizhan]

not necessary for functionalities, but some bodhi tests use it, so it's a nice to have for bodhi compatibility

[xlc]

we have dev_newBlock already. I guess we can alias it to be bit more compatible with existing scripts using manual seal

[DrW3RK]

I might need help with this - How can I issue the RPC call to fast-forward the chain #71 ? I do not see an option on Polkadot-JS UI.

[xlc]

polkadot.js apps doesn't have good support of custom/known RPC so you will need use some other tool to make the RPC call.

I am currently using Postman but there are many good alternative tools available for making WS RPC calls.

For fast forward, you can do this

{
    "id": 2,
    "jsonrpc": "2.0",
    "method": "dev_newBlock",
    "params": [{"count": 10}]
}

Note that due to #83 it is still going to take few seconds to build each block

[ermalkaleci]

@DrW3RK you can use polkadotjs/app to trigger rpc call like this