Show HN: Ethereum Canvas – Draw on the blockchain

Show HN: Ethereum Canvas – Draw on the blockchain
ethereumcanvas.com

    Control.js:111 Uncaught TypeError: Cannot read property 'map' of null
        at t.n.optionsToShow (Control.js:111)
        at t.value (Control.js:233)
        at f._renderValidatedComponentWithoutOwnerOrContext (ReactCompositeComponent.js:796)
        at f._renderValidatedComponent (ReactCompositeComponent.js:819)
        at f._updateRenderedComponent (ReactCompositeComponent.js:743)
        at f._performComponentUpdate (ReactCompositeComponent.js:721)
        at f.updateComponent (ReactCompositeComponent.js:642)
        at f.receiveComponent (ReactCompositeComponent.js:544)
        at Object.receiveComponent (ReactReconciler.js:122)
        at f._updateRenderedComponent (ReactCompositeComponent.js:751)
    
    getContract.js:19 Error: Invalid JSON RPC response: ""
        at Object.InvalidResponse (errors.js:35)
        at XMLHttpRequest.r.onreadystatechange (httpprovider.js:111)
    
    VM146:1 OPTIONS http://localhost:8545/ net::ERR_CONNECTION_REFUSED
    
    Main.js:43 Uncaught (in promise) TypeError: Cannot read property 'getNumberOfShapes' of undefined
        at Main.js:43
        at 
    
    errors.js:35 Uncaught (in promise) Error: Invalid JSON RPC response: ""
        at Object.InvalidResponse (errors.js:35)
        at XMLHttpRequest.r.onreadystatechange (httpprovider.js:111)

> How does this work?

>You'll need the Metamask Chrome extension or an Ethereum enabled browser like Mist or Parity to get started.

Apologize if it's buggy - did not realize this would catch on! Yes you need the metamask chrome extension. Looking into the other issues now.

Thank you for all your feedback!

Update: Appreciate some of you actually trying to submit transactions. The current gas price is around 7 gwei (https://ethgasstation.info/) so there is a high chance that transaction will time out if you put a gas price less than that. If that is your intention that is fine ;)

Update 2: Apparently my total Gas calculation was too optimistic, which has caused some of the transactions to fail. I just made the estimation less optimistic (you get all unused gas back anyway). I hope that works and apologies to everyone who had a bad transaction.