Reconsider EIP 155 transaction about ethereum-tx

[sc0Vu]

var recoveryParam = (kp.getY().isOdd() ? 1 : 0) |
                        (kpX.cmp(r) !== 0 ? 2 : 0);

// Use complement of `s`, if it is > `n / 2`
if (options.canonical && s.cmp(this.nh) > 0) {
  s = this.n.sub(s);
  recoveryParam ^= 1;
}

[jianhuihi]

sign without chainId send transaction

Error: insufficient funds for gas * price + value

$v = 37;
        $chainId = $this->offsetGet('chainId');
        if ($chainId) {
            $v = (int) $chainId * 2 + 35;
        }
        $this->offsetSet('v', $v);

chainID = 1; return the same result.

[olegabr]

any update on this?

[jianhuihi]

try this

https://github.com/Domraider/php-eth-raw-tx

[olegabr]

It has a lot of requirements to the server. hard to use it for average user.
I want to use it for a WordPress plugin, so, user friendlyness is an important issue for me.
It is even easier to use geth with JSON-RPC in this case.
The pure PHP implementation is a must to make things really simple for such applications.

[sc0Vu]

I think the pure PHP implementation is good.
I'll fix this issue when secp256k1 recover function finished (web3p/secp256k1#6).
Still working hard on that (this.g.mulAdd).

Update:
I found the full implement of elliptic: https://github.com/simplito/elliptic-php
Try this to sign and recover tonight.

[jianhuihi]

any update on this?

[jianhuihi]

https://github.com/jianhuihi/ethereum-tx

[sc0Vu]

Just release 0.3 that support EIP155 https://github.com/web3p/ethereum-tx/releases/tag/0.3

[olegabr]

Wow! Does it means that there is a pure PHP Ethereum tx library exists now? I'm excited! :-)
Will try it in my plugin shortly: https://wordpress.org/plugins/cryptocurrency-product-for-woocommerce/