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Cw20 atomic swaps #72

Merged
merged 15 commits into from
Sep 8, 2020
Merged

Cw20 atomic swaps #72

merged 15 commits into from
Sep 8, 2020

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maurolacy
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@maurolacy maurolacy commented Sep 3, 2020

Cw20 swap functionality.

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@ethanfrey ethanfrey left a comment

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Looks good.

I think some of the helpers to combine native and cw20 coins can be extended to make this even cleaner. But that is really for #73 - happy to see how you combined them already and I think we could do something similar with cw20-escrow as well.

I want to go through the test cases again to make sure it is all covered, but in general looks quite good.

contracts/cw20-atomic-swap/Cargo.toml Show resolved Hide resolved
HandleMsg::Create(msg) => try_create(deps, env, msg),
HandleMsg::Create(msg) => try_create(
deps,
env.clone(),
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Why clone? We never use it elsewhere

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@maurolacy maurolacy Sep 7, 2020

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It's needed because of the use of env.message.sent_funds, just below. I think it's because Coin (or the whole Env) doesn't currently implement the Copy trait.

I improved it a bit by cloning only the needed struct member.

I'll create an issue to implement the Copytrait for Coin/ Vec<Coin>.

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Coin contains strings, and cannot be Copy, only Clone.
I missed the other usage below... my bad. It was fine as it was, I just needed ☕

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No problem. I'll just close the issue I wrote regarding Copy coins then.

contracts/cw20-atomic-swap/src/contract.rs Outdated Show resolved Hide resolved
}
}

pub fn try_receive<S: Storage, A: Api, Q: Querier>(
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Nice

contracts/cw20-atomic-swap/src/contract.rs Outdated Show resolved Hide resolved
contracts/cw20-atomic-swap/src/contract.rs Show resolved Hide resolved
contracts/cw20-atomic-swap/src/contract.rs Show resolved Hide resolved
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@ethanfrey ethanfrey left a comment

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Looks good and thanks for the code cleanup

amount: cw20_coin.amount,
msg: Some(to_binary(&HandleMsg::Create(create)).unwrap()),
};
let token_contract = cw20_coin.address; // TODO: Confirm
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Yes, this is correct

recipient: cw20_rcpt,
amount: cw20_coin.amount,
};
assert_eq!(
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Yup. I wonder if some of these asserts could be made easier with a few helpers, but not sure

let env = mock_env("other_somebody", &[]);

// First, let's obtain the preimage from the logs of the release() transaction on Y
let preimage_log = &res.log[2];
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👍

@ethanfrey ethanfrey merged commit a35cfbe into master Sep 8, 2020
@ethanfrey ethanfrey deleted the cw20-atomic-swaps branch September 8, 2020 20:15
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3 participants