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[WIP] Generate actions for Bob's on-chain protocol

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Mimics what @thomaseizinger did here [1] and here [2].

This has the advantage that the consumer has more freedom to execute
`Action`s without having to implement particular traits. The error
handling required inside this protocol-executing function is also
reduced.

As discussed with Thomas, for this approach to work well, the
trait functions such as `receive_transfer_proof` should be infallible,
and the implementer should be forced to hide IO errors behind a retry
mechanism.

All of these asynchronous calls need to be "raced" against
the abort condition (determined by the `refund_timelock`), which is
missing in the current state of the implementation.

The initial handshake of the protocol has not been included here,
because it may not be easy to integrate this approach with libp2p, but
a couple of messages still need to exchanged. I need @tcharding to
tell me if it's feasible/good to do it like this.

[1]
https://github.com/comit-network/comit-rs/blob/move-nectar-swap-to-comit/nectar/src/swap/comit/herc20_hbit.rs#L57-L184.
[2] e584d2b14f/nectar/src/swap.rs (L716-L751).
This commit is contained in:
Lucas Soriano del Pino 2020-10-12 17:17:22 +11:00
parent 1ee060b535
commit 5daa3ea9a8
5 changed files with 232 additions and 16 deletions
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26
xmr-btc/src/bob.rs
View file

@ -255,22 +255,22 @@ impl State1 {
#[derive(Debug)]
pub struct State2 {
A: bitcoin::PublicKey,
b: bitcoin::SecretKey,
s_b: cross_curve_dleq::Scalar,
S_a_monero: monero::PublicKey,
S_a_bitcoin: bitcoin::PublicKey,
v: monero::PrivateViewKey,
pub A: bitcoin::PublicKey,
pub b: bitcoin::SecretKey,
pub s_b: cross_curve_dleq::Scalar,
pub S_a_monero: monero::PublicKey,
pub S_a_bitcoin: bitcoin::PublicKey,
pub v: monero::PrivateViewKey,
btc: bitcoin::Amount,
xmr: monero::Amount,
refund_timelock: u32,
pub xmr: monero::Amount,
pub refund_timelock: u32,
punish_timelock: u32,
refund_address: bitcoin::Address,
redeem_address: bitcoin::Address,
pub refund_address: bitcoin::Address,
pub redeem_address: bitcoin::Address,
punish_address: bitcoin::Address,
tx_lock: bitcoin::TxLock,
tx_cancel_sig_a: Signature,
tx_refund_encsig: EncryptedSignature,
pub tx_lock: bitcoin::TxLock,
pub tx_cancel_sig_a: Signature,
pub tx_refund_encsig: EncryptedSignature,
}
impl State2 {