make lwk available #288

YusukeShimizu · 2024-03-11T00:50:52Z

lbtc swap with lwk

Description

Previously, lbtc swap required running elementsd, but now it can be done with lwk.
Because elementsd requires a lot of resources, making it available in lwk will allow more users to perform swaps.

setup

see docs/setup_lwk.md.

Specification

lwk and esplora-electrs connection is required.
New json rpc api client is implemented for connection to lwk.

Connection to esplora-electrs using go-electrum.
esplora-electrs is also used by lwk as a blockchain.

Configuration

The user can choose to use lwk instead of elements for lbtc swap.
It has the following configuration items.

type LWKConf struct {
	SignerName       string
	WalletName       string
	LWKEndpoint      string
	ElementsEndpoint string
	Network          string
	LiquidSwaps      *bool
}

The user can choose to set up a wallet that holds the signer.
Default uses the same default endpoint (blockstream.info:995) as lwk, but the user can choose his own electrum for ElementsEndpoint.

wallet

Peerswap's onchain wallet provide the following features.

type Wallet interface {
	GetAddress() (string, error)
	SendToAddress(string, uint64) (string, error)
	GetBalance() (uint64, error)
	CreateAndBroadcastTransaction(swapParams *swap.OpeningParams, asset []byte) (txid, rawTx string, fee uint64, err error)
	SendRawTx(rawTx string) (txid string, err error)
	GetFee(txSize int64) (uint64, error)
}

GetAddress() (string, error)

This method is used to get the address of the wallet.
Use lwk address.

SendToAddress(string, uint64) (string, error)

This method is used to send money to a specific address.
lwk send to create a psbt, sign to sign it, and broadcast to broadcast it.

CreateAndBroadcastTransaction(swapParams *swap.OpeningParams, asset []byte) (txid, rawTx string, fee uint64, err error)

This method is used to create and broadcast opening tx.
The interface has been split into the following two interfaces,
but they will be merged into a single interface for lwk support.
Existing bitcoin wallets will also be changed, but functionality will remain the same.

CreateFundedTransaction(preparedTx *transaction.Transaction) (rawTx string, fee uint64, err error)
FinalizeFundedTransaction(unpreparedTx string) (preparedTxHex string, err error)

SendRawTx(rawTx string) (txid string, err error)

This method is used to broadcast the closing tx.
This is done using electrum cient's blockchain.transaction.broadcast method.

GetFee(txSize int64) (uint64, error)

This method is used to get the fee blockchain.estimatefee.

tx watcher

tx watcher is a function that monitors onchain status and notifies opening tx and closing tx.
The following interface must be implemented.

type TxWatcher interface {
	AddWaitForConfirmationTx(swapId, txId string, vout, startingHeight uint32, scriptpubkey []byte)
	AddWaitForCsvTx(swapId, txId string, vout uint32, startingHeight uint32, scriptpubkey []byte)
	AddConfirmationCallback(func(swapId string, txHex string, err error) error)
	AddCsvCallback(func(swapId string) error)
	GetBlockHeight() (uint32, error)
	StartWatchingTxs() error
}

So far, peerswap has used bitcoind/elementsd, but lwk uses the electrum client on which lwk depends.

AddWaitForConfirmationTx(swapId, txId string, vout, startingHeight uint32, scriptpubkey []byte)

Wait for a specific tx to be confirmed with a specific block height.
This function uses the electrum client blockchain.scriptthash.get_history.

AddWaitForCsvTx(swapId, txId string, vout uint32, startingHeight uint32, scriptpubkey []byte)

Wait for a specific tx to reach the csv limit at a specific block height.
This function uses the electrum client blockchain.scriptthash.get_history.

GetBlockHeight() (uint32, error)

Function to retrieve block height.
Use blockchain.headers.subscribe of electrum client.

StartWatchingTxs() error

Function to start tx watcher.
Periodically calls blockchain.scripthash.get_history of electrum client and executes callback when the condition is met.

remove blockwatcher.go and associated block height functions The blockwatcher.go file and its associated functions for tracking block height changes have been removed. block height tracking is no longer necessary and has been replaced by a different mechanism.

`CreateFundedTransaction` and `FinalizeFundedTransaction` have merged interfaces, CreateAndBroadcastTransaction. This is because there was originally no reason to separate them, and because lwk uses the psbt format, transacrion conversion needs to be performed. The liquid wallet interface should not have a unique liquid wallet-dependent definition. However, there were some that depended on gelements, so they were separated out.

lwkclient is a library for interacting directly with lwk server via json rpc. LWKRpcWallet acts as an onchain wallet for peerswap It uses lwk and electrs. - Implement API structure with request handling, including retry logic and response body draining. - Provide configuration options for HTTP client with retry logic - Utilize JSON-RPC 2.0 for request and response handling. - Ensure proper error handling and logging. - Create lwkclient with methods for address generation, sending transactions, signing, broadcasting, balance querying, and wallet details retrieval. - Implement LWKRpcWallet with necessary wallet operations - Ensure wallet setup and transaction creation/broadcasting - Add utility functions for balance retrieval and fee estimation.

tx watcher is a function that monitors onchain status and notifies opening tx and closing tx. Introduce ElectrumRPC interface and electrumTxWatcher for Electrum-based transaction watching. Also, add generated mock for electrumRPC interface. Mock generation is performed by go.uber.org/mock/mockgen.

Input can be in toml or ini format, but each is managed as the same config. To make it loosely coupled, used the builder pattern to set item. I also add validation of the config. The config file cannot be modified from the outside.

RCasatta · 2024-05-03T09:36:57Z

packages.nix

+    # lwk: init at 0.3.0 #292522
+    # https://github.com/NixOS/nixpkgs/pull/292522/commits/2b3750792b2e4b52f472b6e6d88a6b02b6536c43
+    rev2 = "2b3750792b2e4b52f472b6e6d88a6b02b6536c43";
+    nixpkgs2 = fetchNixpkgs rev2;
+    pkgs2 = import nixpkgs2 {};
+    # blockstream-electrs: init at 0.4.1 #299761
+    # https://github.com/NixOS/nixpkgs/pull/299761/commits/680d27ad847801af781e0a99e4b87ed73965c69a
+    rev3 = "680d27ad847801af781e0a99e4b87ed73965c69a";
+    nixpkgs3 = fetchNixpkgs rev3;
+    pkgs3 = import nixpkgs3 {};
+    blockstream-electrs = pkgs3.blockstream-electrs.overrideAttrs (oldAttrs: {
+        cargoBuildFlags = [ "--features liquid" "--bin electrs" ];
+    });


There are also nix flakes for lwk and blockstream-electrs, I am curious to know if it was unknown or if it's preferred to avoid flakes

Thank you for confirming this.
I know that flake exists and I'm not trying to avoid installing it.

I don't know enough about nix but would it be better to add binLiquid to the package and use it for peerswap devShell?
I created draft PR of this.

I also seem to get build errors.
I think it should be fixed.

nix run .#blockstream-electrs-liquid -- --network liquid error: builder for '/nix/store/nkkv9v3r310p5gp09zv3hmn29y63mia3-electrs-deps-0.4.1.drv' failed with exit code 101; last 25 log lines: > Checking futures-channel v0.3.30 > Checking which v4.4.2 > Compiling bitcoind v0.34.1 > Checking rand v0.4.6 > Checking rustc-demangle v0.1.23 > Checking iana-time-zone v0.1.60 > Checking unicode-width v0.1.11 > Checking tower-service v0.3.2 > Checking winapi v0.2.8 > Checking option-ext v0.2.0 > Compiling bitcoin_hashes v0.10.0 > Checking base64-compat v1.0.0 > Checking dirs-sys v0.4.1 > Checking hyper v0.14.28 > Checking bitcoincore-rpc-json v0.18.0 > Compiling elementsd v0.9.1 > error[E0425]: cannot find function `download_filename` in this scope > --> /nix/store/n1a9vx4rppg99v909c7hw2jc5d1yj7f2-vendor-cargo-deps/c19b7c6f923b580ac259164a89f2577984ad5ab09ee9d583b888f934adbbe8d0/elementsd-0.9.1/build.rs:59:33 > | > 59 | let download_filename = download_filename(); > | ^^^^^^^^^^^^^^^^^ not found in this scope > > For more information about this error, try `rustc --explain E0425`. > error: could not compile `elementsd` (build script) due to previous error > warning: build failed, waiting for other jobs to finish... For full logs, run 'nix-store -l /nix/store/nkkv9v3r310p5gp09zv3hmn29y63mia3-electrs-deps-0.4.1.drv'. error: 1 dependencies of derivation '/nix/store/qpdjg9rmj3b9w33l50gmg4jdl8671738-electrs-0.4.1.drv' failed to build

Which commit are you using?

current new-index branch seems fine to me

$ git log | head -n 1 commit efc1fec8b0f96b5663d7257a0c2cffd8ef143219 $ nix run .#blockstream-electrs-liquid -- --network liquid Config { log: StdErrLog { verbosity: Error, quiet: false, show_level: true, timestamp: Off, modules: [], writer: "stderr", color_choice: Auto, show_module_names: false }, network_type: Liquid, db_path: "./db/liquid", daemon_dir: "/home/casatta/.bitcoin/liquidv1", blocks_dir: "/home/casatta/.bitcoin/liquidv1/blocks", daemon_rpc_addr: 127.0.0.1:7041, cookie: None, electrum_rpc_addr: 127.0.0.1:51000, http_addr: 127.0.0.1:3000, http_socket_file: None, monitoring_addr: 127.0.0.1:34224, jsonrpc_import: false, light_mode: false, address_search: false, index_unspendables: false, cors: None, precache_scripts: None, utxos_limit: 500, electrum_txs_limit: 500, electrum_banner: "Welcome to electrs-esplora 0.4.1", electrum_rpc_logging: None, parent_network: Bitcoin, asset_db_path: None }

I'm using the same commit.
There seems to be an error in my environment.

$ git log | head -n 1 commit efc1fec8b0f96b5663d7257a0c2cffd8ef143219 $ nix run .#blockstream-electrs-liquid -- --network liquid error: builder for '/nix/store/nkkv9v3r310p5gp09zv3hmn29y63mia3-electrs-deps-0.4.1.drv' failed with exit code 101; last 25 log lines: > Checking rand v0.4.6 > Checking tower-service v0.3.2 > Checking option-ext v0.2.0 > Checking winapi v0.2.8 > Checking rustc-demangle v0.1.23 > Checking unicode-width v0.1.11 > Compiling bitcoin_hashes v0.10.0 > Checking iana-time-zone v0.1.60 > Checking bitcoincore-rpc-json v0.18.0 > Checking base64-compat v1.0.0 > Checking chrono v0.4.34 > Checking textwrap v0.11.0 > Checking rand v0.3.23 > Checking hyper v0.14.28 > Checking dirs-sys v0.4.1 > Compiling elementsd v0.9.1 > error[E0425]: cannot find function `download_filename` in this scope > --> /nix/store/n1a9vx4rppg99v909c7hw2jc5d1yj7f2-vendor-cargo-deps/c19b7c6f923b580ac259164a89f2577984ad5ab09ee9d583b888f934adbbe8d0/elementsd-0.9.1/build.rs:59:33 > | > 59 | let download_filename = download_filename(); > | ^^^^^^^^^^^^^^^^^ not found in this scope > > For more information about this error, try `rustc --explain E0425`. > error: could not compile `elementsd` (build script) due to previous error > warning: build failed, waiting for other jobs to finish... For full logs, run 'nix log /nix/store/nkkv9v3r310p5gp09zv3hmn29y63mia3-electrs-deps-0.4.1.drv'. error: 1 dependencies of derivation '/nix/store/qpdjg9rmj3b9w33l50gmg4jdl8671738-electrs-0.4.1.drv' failed to build

can you try a nix flake update before nix run I am thinking to update the flake.lock anyway...

Hmmm, doesn't seem to solve the problem.

$ nix flake update warning: updating lock file '/workspaces/electrs/flake.lock': • Updated input 'crane': 'github:ipetkov/crane/a329cd00398379c62e76fc3b8d4ec2934260d636?narHash=sha256-iZDHWTqQj6z6ccqTSEOPOxQ8KMFAemInUObN2R9vHSs%3D' (2024-03-28) → 'github:ipetkov/crane/442a7a6152f49b907e73206dc8e1f46a61e8e873?narHash=sha256-uXNW6bapWFfkYIkK1EagydSrFMqycOYEDSq75GmUpjk%3D' (2024-05-04) • Updated input 'nixpkgs': 'github:NixOS/nixpkgs/2726f127c15a4cc9810843b96cad73c7eb39e443?narHash=sha256-UKcYiHWHQynzj6CN/vTcix4yd1eCu1uFdsuarupdCQQ%3D' (2024-03-27) → 'github:NixOS/nixpkgs/b211b392b8486ee79df6cdfb1157ad2133427a29?narHash=sha256-CLU5Tsg24Ke4%2B7sH8azHWXKd0CFd4mhLWfhYgUiDBpQ%3D' (2024-05-07) • Updated input 'rust-overlay': 'github:oxalica/rust-overlay/aa858717377db2ed8ffd2d44147d907baee656e5?narHash=sha256-oD4OJ3TRmVrbAuKZWxElRCyCagNCDuhfw2exBmNOy48%3D' (2024-03-28) → 'github:oxalica/rust-overlay/a8bfc2569a1965c0da8711d289d973f0011b441a?narHash=sha256-oujsCgNiQnZoQntNkkNkA7BhCmUvf9FLWj%2B2oGT2Jvc%3D' (2024-05-08) warning: Git tree '/workspaces/electrs' is dirty $ nix run .#blockstream-electrs-liquid -- --network liquid warning: Git tree '/workspaces/electrs' is dirty error: builder for '/nix/store/rcd2hcxdnb6v23c7mjjm33wqjbasdrvr-electrs-deps-0.4.1.drv' failed with exit code 101; last 25 log lines: > Compiling bitcoin_hashes v0.12.0 > Checking object v0.32.2 > Checking futures-channel v0.3.30 > Checking which v4.4.2 > Compiling bitcoind v0.34.1 > Checking rand v0.4.6 > Checking iana-time-zone v0.1.60 > Checking tower-service v0.3.2 > Checking rustc-demangle v0.1.23 > Checking unicode-width v0.1.11 > Compiling bitcoin_hashes v0.10.0 > Checking bitcoincore-rpc-json v0.18.0 > Checking option-ext v0.2.0 > Checking winapi v0.2.8 > Compiling elementsd v0.9.1 > error[E0425]: cannot find function `download_filename` in this scope > --> /nix/store/cjjfa06qzk9wahmbqjh7kn86bsmaq3dv-vendor-cargo-deps/c19b7c6f923b580ac259164a89f2577984ad5ab09ee9d583b888f934adbbe8d0/elementsd-0.9.1/build.rs:59:33 > | > 59 | let download_filename = download_filename(); > | ^^^^^^^^^^^^^^^^^ not found in this scope > > For more information about this error, try `rustc --explain E0425`. > Checking dirs-sys v0.4.1 > error: could not compile `elementsd` (build script) due to previous error > warning: build failed, waiting for other jobs to finish... For full logs, run 'nix log /nix/store/rcd2hcxdnb6v23c7mjjm33wqjbasdrvr-electrs-deps-0.4.1.drv'. error: 1 dependencies of derivation '/nix/store/z7wa0ixizb5xq32dfs8s0fv23yds4lcl-electrs-0.4.1.drv' failed to build

The integration test for LWK is added to ensure that the swap functionality works as expected with the LWK and electrs support. The setup functions are implemented to create the necessary test environment, including lwk, Bitcoin and Liquid nodes, as well as two lightning nodes with the PeerSwap. This setup is crucial for testing the swap-in process in an environment that closely mimics production. also, added Electrs and LWK structs for testing framework. - Implement `Electrs` struct to manage electrs daemon processes - Implement `LWK` struct to manage LWK daemon processes - Provide constructors for both structs to initialize with dynamic ports and configurations - Include methods to run the processes and connect

grubles · 2024-05-08T19:10:59Z

CLN as swap-out sender seems to be unable to get the starting block height from LWK?

Using CLN 24.02.2 and LWK 0.3.0

2eb4834f573c060d9200ce77544a29b48a0aa5923 got msgtype: a45d for swap: efa2c9c38ea24acff600af12d61677f50679b0e2d137fcd037c760411eaa4cfc
2024-05-08T19:09:05.555Z DEBUG   plugin-peerswap: [FSM] event:id: efa2c9c38ea24acff600af12d61677f50679b0e2d137fcd037c760411eaa4cfc, Event_OnTxOpenedMessage on State_SwapOutSender_AwaitTxBroadcastedMessage
2024-05-08T19:09:05.584Z INFO    plugin-peerswap: [FSM] Action failure could not get starting block height of the swap.
2024-05-08T19:09:05.585Z DEBUG   plugin-peerswap: [FSM] event:id: efa2c9c38ea24acff600af12d61677f50679b0e2d137fcd037c760411eaa4cfc, Event_ActionFailed on State_SwapOutSender_AwaitTxConfirmation
2024-05-08T19:09:05.591Z DEBUG   plugin-peerswap: [FSM] event:id: efa2c9c38ea24acff600af12d61677f50679b0e2d137fcd037c760411eaa4cfc, Event_ActionSucceeded on State_SwapOutSender_SendPrivkey
2024-05-08T19:09:05.592Z DEBUG   035ca2fe4793a5e789ce846062eb4834f573c060d9200ce77544a29b48a0aa5923-connectd: peer_out INVALID 42081
2024-05-08T19:09:05.599Z DEBUG   plugin-peerswap: [FSM] event:id: efa2c9c38ea24acff600af12d61677f50679b0e2d137fcd037c760411eaa4cfc, Event_ActionSucceeded on State_SwapOutSender_SendCoopClose
2024-05-08T19:09:05.600Z INFO    plugin-peerswap: [Swap:efa2c9c38ea24acff600af12d61677f50679b0e2d137fcd037c760411eaa4cfc] Swap claimed cooperatively

ensure client is properly reinitialized before subscribing to headers to prevent potential stale connections.

The Event_OnRetry is designed to execute 20 retries and stop the process if it still fails. This patch adds the missing Event_OnTimeout transition to transit to coop close if the lwk is not restarted.

nepet

Nice work @YusukeShimizu! That was a heavy lift. I really like your interface refinements and the way you seamlessly integrate lwk into the rest of the repo. I wish the rest of the repo would be as clean as the lwk package ^^.

I may have an explanation as to why the liveleyness test using the rpc_command hook resulted in unexpected behaviour, crashing other plugins: The hook will be called on EVERY rpc call globally, regardless the method or the namespace. So if peerswap as a plugin is still active but the connection to gbitcoin or elements is already lost, this results in returning an error on EVERY rpc call made (inter process as well) which may crash other plugins that come after peerswap in the shutdown sequence. A possible fix would have been to only act on methods that are of peerswaps namespace.

I have some minor nits about naming of units - kvB and vB mixups and would suggest to revisit the fee unit conversion unit-test as it seems to be off.

Besides that the PR seemes good to go for me to test it out in the wild.

lwk/lwkwallet.go

electrum/block_subscriber.go

lwk/lwkwallet.go

lwk/lwkwallet_test.go

clightning/clightning.go

lwk/electrumtxwatcher.go

The version of lwk has been raised to cli_0.5.1. Change to use flake to use cli_0.5.1 in nix as well. Using flake allows you to run nix develop instead of nix-shell. Just uses the flake on nix shell. For the nix-env addon users.

Variable and function names have been corrected to eliminate confusion with fee calculations. Test cases have also been refactored.

implement SetLabel method to call walletSetTxMemo for setting transaction memos.

YusukeShimizu · 2024-07-01T08:10:00Z

Thank you for your review.
Can you please confirm that I have made the following corrections?

Migrated nix to nix flake and update lwk version to use wallet_set_tx_memo. 45fb414
- flake was needed to update the lwk version, but as it is common to use flake, I think this is a good opportunity to switch.
- In addition, CI is now also faster, around 6 minutes.
Refactor of tx fee calculation 7045055
- Mainly name fixes and test case fixes.
set label 66fead0
- With the version up of lwk, wallet_set_tx_memo is now available
- I am checking that the set label is being executed. make lwk available #288 (comment)

nepet · 2024-07-01T11:27:58Z

Looks good to me!
Ack 66fead0

grubles · 2024-07-04T02:14:45Z

Tested ACK 66fead0

YusukeShimizu force-pushed the lwk-swap branch 8 times, most recently from 8603558 to 37f5bcd Compare March 29, 2024 07:51

YusukeShimizu force-pushed the lwk-swap branch 3 times, most recently from 02832df to e7513c6 Compare May 1, 2024 00:47

YusukeShimizu added 2 commits May 1, 2024 12:35

YusukeShimizu force-pushed the lwk-swap branch from e7513c6 to e6194f3 Compare May 1, 2024 03:36

YusukeShimizu added 2 commits May 1, 2024 12:56

multi: lwk configuration support for Liquid swaps

ab80a53

Input can be in toml or ini format, but each is managed as the same config. To make it loosely coupled, used the builder pattern to set item. I also add validation of the config. The config file cannot be modified from the outside.

YusukeShimizu force-pushed the lwk-swap branch 2 times, most recently from 48f67fd to e7769ed Compare May 2, 2024 06:08

RCasatta reviewed May 3, 2024

View reviewed changes

YusukeShimizu force-pushed the lwk-swap branch from 96983c5 to 8157268 Compare May 5, 2024 22:55

YusukeShimizu force-pushed the lwk-swap branch from 8157268 to 538b83c Compare May 5, 2024 22:59

YusukeShimizu changed the title ~~wip: make lwk available~~ make lwk available May 6, 2024

YusukeShimizu marked this pull request as ready for review May 6, 2024 01:05

YusukeShimizu force-pushed the lwk-swap branch 4 times, most recently from 44c7d05 to a448d46 Compare May 9, 2024 07:39

YusukeShimizu added 3 commits June 27, 2024 09:52

electrum: ensure client is properly reinitialized

6c6c802

ensure client is properly reinitialized before subscribing to headers to prevent potential stale connections.

swap: add exponential backoff and jitter mechanism

c4e9145

swap: add missing Event_OnTimeout transition

22f4e66

The Event_OnRetry is designed to execute 20 retries and stop the process if it still fails. This patch adds the missing Event_OnTimeout transition to transit to coop close if the lwk is not restarted.

YusukeShimizu force-pushed the lwk-swap branch from 1f615d4 to 22f4e66 Compare June 27, 2024 00:52

nepet reviewed Jun 27, 2024

View reviewed changes

YusukeShimizu force-pushed the lwk-swap branch 15 times, most recently from f1671ff to f9463c1 Compare July 1, 2024 01:12

YusukeShimizu added 3 commits July 1, 2024 10:21

multi: using nix flake and upgrading lwk

45fb414

The version of lwk has been raised to cli_0.5.1. Change to use flake to use cli_0.5.1 in nix as well. Using flake allows you to run nix develop instead of nix-shell. Just uses the flake on nix shell. For the nix-env addon users.

lwkwallet: refactor fee calculations

7045055

Variable and function names have been corrected to eliminate confusion with fee calculations. Test cases have also been refactored.

lwkwallet: implement SetLabel method

66fead0

implement SetLabel method to call walletSetTxMemo for setting transaction memos.

YusukeShimizu force-pushed the lwk-swap branch from f9463c1 to 66fead0 Compare July 1, 2024 01:21

YusukeShimizu requested a review from nepet July 1, 2024 08:10

YusukeShimizu merged commit 95b9983 into ElementsProject:master Jul 5, 2024
8 checks passed

YusukeShimizu deleted the lwk-swap branch July 5, 2024 10:47

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make lwk available #288

make lwk available #288

YusukeShimizu commented Mar 11, 2024 •

edited

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RCasatta May 3, 2024

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grubles commented May 8, 2024 •

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YusukeShimizu commented Jul 1, 2024

nepet commented Jul 1, 2024

grubles commented Jul 4, 2024

make lwk available #288

make lwk available #288

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YusukeShimizu commented Mar 11, 2024 • edited Loading

lbtc swap with lwk

Description

setup

Specification

Configuration

wallet

GetAddress() (string, error)

SendToAddress(string, uint64) (string, error)

CreateAndBroadcastTransaction(swapParams *swap.OpeningParams, asset []byte) (txid, rawTx string, fee uint64, err error)

SendRawTx(rawTx string) (txid string, err error)

GetFee(txSize int64) (uint64, error)

tx watcher

AddWaitForConfirmationTx(swapId, txId string, vout, startingHeight uint32, scriptpubkey []byte)

AddWaitForCsvTx(swapId, txId string, vout uint32, startingHeight uint32, scriptpubkey []byte)

GetBlockHeight() (uint32, error)

StartWatchingTxs() error

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