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Fixes to the atomic swap section

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Can only swap with Ethereum right now, not Bitcoin. Pubkey derivation is a hash function.
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Ignotus Peverell 2018-06-16 16:46:28 +01:00 committed by GitHub
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doc/contracts.md
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@ -158,10 +158,11 @@ This contract can be trivially used for unidirectional payment channels.
TODO still WIP, mostly ability for Alice to check `x*G` is what is locked on
the other chain. Check this would work on Ethereum (pubkey derivation).
Alice has grins and Bob has bitcoins. They would like to swap. We assume that
Bob built an output on the Bitcoin blockchain that can be spent either by Alice
if she learns about a hash pre-image `x`, or by Bob after time `Tb`. Alice is
ready to send her grins to Bob if he reveals `x`.
Alice has grins and Bob has ether. They would like to swap. We assume Bob has
a contract on the Ethereum blockchain that allows withdrawal either by Alice
if she learns a hash pre-image `x`, or by Bob after time `Tb`. Alice is ready
to send her grins to Bob if he reveals `x`. In this setup, we consider public
key derivation `x*G` to be our hash function.
First, Alice sends her grins to a multiparty timelock contract with a refund
time `Ta < Tb`. To send the 2-of-2 output to Bob and execute the swap, Alice
@ -181,6 +182,8 @@ signature is `(sr + ss, kr*G + ks*G)`.
6. As soon as Bob broadcasts the final transaction to get his new grins, Alice
can compute `sr' - sr` to get `x`.
TODO review this, see if it could work on other chains.
## Hashed Timelocks (Lightning Network)
TODO relative lock times