The `EventLoop` will use the `Builder` interface to instantiate a
`Swap` upon receiving a `SwapRequest` and successfully doing an
execution setup.
Before this change, the `EventLoop` would have to hold the path to the
db and re-open the db everytime it wants to construct a swap.
With this change, we can open the DB once and then hold a
`Arc<Database>` in the `EventLoop` and pass it to new `Swap`s structs.
179: Watch only tmp monero wallet r=da-kami a=da-kami
When initializing Monero wallet, try to open temporary wallet, if opening errors then try to create it. If creating errors then fail with message asking the user to configure the wallet RPC.
If opening / creation succeeds get the block_height to verify that connection to wallet works, then proceed to swap.
Note: RPC error handling is hacky, but I don't see the value of investing time into that at this point. The problem is, that we don't deal with the json rpc errors properly for calls were we don't serialize the result into an object (because the response is empty). Eventually we should switch to using https://github.com/thomaseizinger/rust-jsonrpc-client but that does not support parameters `by-name` yet, see: https://github.com/thomaseizinger/rust-jsonrpc-client/issues/20
Co-authored-by: Daniel Karzel <daniel@comit.network>
170: Cancel and refund commands r=da-kami a=da-kami
I plugged the cancel and refund logic into the current state/state-machine logic of the swap.
## Follow ups (out of scope)
We might want to record issues to be tackled later, since we are on a tight time budget :)
Please let me know what you think @D4nte @rishflab
### Problems with `ack` after sending a message
Alice was waiting forever when awaiting the `ack` from bob when sending the lock proof in case she runs into a dial error. It seems the `acks` can cause the program to hang. This is a severe problem that we most probably will encountered in production at some point. For this PR I wrapped the `ack` of Alice upon sending the `encsig` in a timeout to work around this problem, see 7463081f88 - but **we might want to consider to remove all `ack` message. I don't see much value in them if we don't have a resilient retry strategy.**
### Do not require Monero wallet for cancel/refund
The cancel/refund commands don't require a monero wallet.
In this PR we re-uses the builder which requires the monero wallet as well - and we check for the monero balance upon wallet initialization, so the command will fail if no monero wallet is started.
### Save Alice connection info in Bob DB
Save Alice's peer-id/address in DB: It's cumbersome for the user to lookup those details again.
Co-authored-by: Daniel Karzel <daniel@comit.network>
This was introduced due to a CI run, where Bob included tx_refund, but Alice had waited until T2 had expired,
and then went for punishing Bob instead of refunding.
Weirdly, Alice's punich transaction did not fail in that scenario.
If dialing Bob fails Alice waits for the acknowledgement of the transfer proof indefinitely.
The timout prevents her execution from hanging.
Added a ToDo to re-visit the ack receivers. They don't add value at the moment and should be removed.
161: Introduce configuration file and initial setup through CLI r=da-kami a=da-kami
PRs chained on top of this one:
- [x] https://github.com/comit-network/xmr-btc-swap/pull/163 Configurable config with `--config` option on CLI (we will need this for swaps with ourselves...)
- [x] ~~https://github.com/comit-network/xmr-btc-swap/pull/165 Reset config with `--reset-config` option on CLI (this makes it easier for the user to clean up)~~
- [x] https://github.com/comit-network/xmr-btc-swap/pull/166 data-dir, in accordance to config-dir, should be pointed to the appropriate default directory using `directory-next`
Looks n' feel:
Initial startup:
```
2021-01-28T01:35:45.000205Z INFO swap::trace: Initialized tracing with level: INFO
2021-01-28T01:35:45.001286Z INFO swap: Database and Seed will be stored in directory: /Users/dakami/CoBloX/TEMP/swap-data-dir/alice
2021-01-28T01:35:45.003391Z INFO swap::config::seed: Read in seed from file: /Users/dakami/CoBloX/TEMP/swap-data-dir/alice/seed.pem
2021-01-28T01:35:45.003603Z INFO swap::config: Config file not found, running initial setup...
? Enter Bitcoind URL (including username and password if applicable) or hit return to use default (http://127.0.0.1:18332) › http://dakami:xkz4nyywpKf3BigwKIRdVijmWzaHCOmUisepQpDlsXnhpNd6uO@127.0.0.1:18332/
✔ Enter Bitcoind URL (including username and password if applicable) or hit return to use default · http://dakami:xkz4nyywpKf3BigwKIRdVijmWzaHCOmUisepQpDlsXnhpNd6uO@127.0.0.1:18332/
? Enter Bitcoind wallet name › alice
✔ Enter Bitcoind wallet name · alice
? Enter Monero Wallet RPC URL or hit enter to use default (http://127.0.0.1:38083/json_rpc) ›
✔ Enter Monero Wallet RPC URL or hit enter to use default · http://127.0.0.1:38083/json_rpc
2021-01-28T01:35:58.553401Z INFO swap::config: Initial setup complete, config file created at /Users/dakami/Library/Application Support/xmr-btc-swap/config.toml
2021-01-28T01:35:58.647761Z INFO swap: Connection to Bitcoin wallet succeeded, balance: 0.00744521 BTC
2021-01-28T01:35:58.650060Z INFO swap: Connection to Monero wallet succeeded, balance: 29.095359550000 XMR
2021-01-28T01:35:58.650258Z INFO swap: Swap sending 0.030000000000 XMR and receiving 0.00060000 BTC started with ID e07b2cc1-3749-48fd-931a-6cbaf57b8124
2021-01-28T01:35:59.004306Z INFO swap::protocol::alice::swap: Current state:started
```
After:
```
2021-01-28T01:36:57.881654Z INFO swap::trace: Initialized tracing with level: INFO
2021-01-28T01:36:57.882691Z INFO swap: Database and Seed will be stored in directory: /Users/dakami/CoBloX/TEMP/swap-data-dir/alice
2021-01-28T01:36:57.884171Z INFO swap::config::seed: Read in seed from file: /Users/dakami/CoBloX/TEMP/swap-data-dir/alice/seed.pem
2021-01-28T01:36:57.884353Z INFO swap::config: Using config file at default path: /Users/dakami/Library/Application Support/xmr-btc-swap/config.toml
2021-01-28T01:36:57.996153Z INFO swap: Connection to Bitcoin wallet succeeded, balance: 0.00744521 BTC
2021-01-28T01:36:57.998648Z INFO swap: Connection to Monero wallet succeeded, balance: 29.095359550000 XMR
2021-01-28T01:36:57.998928Z INFO swap: Swap sending 0.030000000000 XMR and receiving 0.00060000 BTC started with ID 08dd6dc1-9460-4c0a-91ef-a05df309b6ed
2021-01-28T01:36:58.353738Z INFO swap::protocol::alice::swap: Current state:started
```
Command:
```
run --package swap --bin swap --
--data-dir /Users/dakami/CoBloX/TEMP/swap-data-dir/alice
sell-xmr
--receive-btc 0.0006
--send-xmr 0.03
```
Co-authored-by: Daniel Karzel <daniel@comit.network>
Co-authored-by: Daniel Karzel <daniel.karzel@coblox.tech>
