Embed solc / Ensure Solidity compiler availability

[0xc1c4da]

Project Oaken's DApp fails on Contract Deployment on their DApp here:
http://50.112.52.169/pages/index.html

The method createMeter that fails can be found in http://50.112.52.169/ethjs/ethFunctions.js

They believe it is because of the account being locked, ideally we should intercept this like sendTransaction and make user aware.

[0xc1c4da]

This is abit strange to me, as I was sure contract deployment was via sendTransaction

[0xc1c4da]

Yep it is https://github.com/ethereum/web3.js/blob/develop/lib/web3/contract.js#L202

[0xc1c4da]

http://ethereum.stackexchange.com/questions/6870/create-a-new-contract-by-json-rpc-of-cpp-ethereum

[0xc1c4da]

Since solc might be a challenge to embed and execute (will rely on @farazdagi advise on here)
an alternative would be to use the Emscripten compiled version of solc and execute in a JS environment

https://www.npmjs.com/package/solc
https://github.com/ethereum/solc-bin

[0xc1c4da]

Some updates on this, the current static library cgo wrapper for solc is about 17mb, if we're supporting 3 architectures thats a ~50mb additional size, now we have our own web3 provider in webview, it makes alot more sense to use the npm emcscripten version of solc, as it is only 7mb and would work across all 3 architectures.

[rasom]

There is the next error when i'm trying to run solc-bin in Otto:

(anonymous): Line 2:1126536 Invalid regular expression: re2: Invalid (?=) <lookahead> (and 103 more errors)

[rasom]

That's the part of the code that causes error, as i undertnad

var valid6regx=/^((?=.*::)(?!.*::.+::)(::)?([\dA-F]{1,4}:(:|\b)|){5}|([\dA-F]{1,4}:){6})((([\dA-F]{1,4}((?!\3)::|:\b|$))|(?!\2\3)){2}|(((2[0-4]|1\d|[1-9])?\d|25[0-5])\.?\b){4})$/i;

[rasom]

?! (negative lookahead) also causes this error. So we need to rewrite this regex if we are going to run solc-bin in Otto, as golang doesn't support lookahead/lookbehind StefanSchroeder/Golang-Regex-Tutorial#11

[0xc1c4da]

New emscripten solc in nightly.2017.1.13+ 5x speedup

[0xc1c4da]

We can possibly close this because ethereum/EIPs/issues/209

[Souptacular]

Having solc as a command line option in geth (accessed through a web3 call) is very rarely used and I believe the geth team has deprecated it (see Jarrad's comment above). At Oaken we no longer need this feature. Because it was opened at our request feel free to close it. Thanks!

[jeluard]

eth_compile methods have been deprecated and removed from geth.