mattdf / payment-channel

Ethereum Payment Channel in 50 lines of code

👋

payment-channel's Issues

How can the recipient know the contract is valid?

How can the recipient know the contract is valid and not just a decoy contract that also expose the same methods but never pays out?

Why require CloseChannel() to be called twice?

What is the rationale behind requiring CloseChannel() to be called twice (once with Bob's signature and once with Alice's signature)? Alice should be responsible for closing the channel so she would be the one to call CloseChannel() twice and pay the transaction fees. Why not have CloseChannel() take both signatures so it can be closed with one transaction? This would be clearer, cheaper and faster. I can't think of any advantage to having two transactions be required.

How is that possible that proof is the same hash as h ?

I dont understand how that code:
proof = sha3(this, value); if (proof != h) throw;
which seems to be equivalent to:
sha3(ContractAddress, value) == sha3(RadomAddress, value)
may works.

Could you add a unit test that call contract's CloseChannel function ?

wouldnt this be an || statemenet instead of &&

payment-channel/channel.sol

Line 27 in 515c1b9

if (signer != channelSender && signer != channelRecipient) throw;

Named variables?

Hi!
I think your example is one of the clearest... Yet, it would be helpful if you used more descriptive variable names in the method signature ;)

[HELP] Payment Channel Implementation for Dapp

Help please

Hi! I've been doing my research and I found this article Signing and Verifying Messages in Ethereum as well as this Ethereum Payment Channel in 50 Lines of Code and so far I haven't seen any implementation or tutorial about this.

My primary use of this smart contract is to pay transaction fees for the user in my Dapp. Is there an example of how to use the smart contract for a dapp?

Example: A simple ethereum dapp that writes a text on the blockchain but the creator of the contract pays for the transaction fees for a user that owns 0 ETH.

I really hope this is possible.