Relay subcommand that performs token RLT <> MLAU token swap

[svyatonik]

New subcommand illustration:

svyatonik@xwnotebook:~/dev/parity-bridges-common.test$ reset && RUST_LOG=bridge=trace ./bin/substrate-relay swap-tokens millau-to-rialto --source-host=127.0.01 --source-port=10944 --source-signer=//WithRialtoTokenSwap --target-host=127.0.0.1 --target-port=9944 --target-signer=//WithMillauTokenSwap --source-balance=8000000000 --target-balance=9000000000 no-lock
INFO bridge Starting swap: TokenSwap { swap_type: TokenSwapType::TemporaryTargetAccountAtBridgedChain, source_balance_at_this_chain: 8000000000, source_account_at_this_chain: 18ac67fc2e27eb643dc856aee5d6698ecbd8b56cb0d0c9976075e861652aa25e (5Cd4Dp9q...), target_balance_at_bridged_chain: 9000000000, target_account_at_bridged_chain: 3e96c805858b0ba5148b95ef1f449ebd10178f24a2d803a709fec4778d45b97a (5DUmcmGY...) }
INFO bridge Swap accounts: TokenSwapAccounts { source_account_at_this_chain: 18ac67fc2e27eb643dc856aee5d6698ecbd8b56cb0d0c9976075e861652aa25e (5Cd4Dp9q...), source_account_at_bridged_chain: f73221a9b67cafbc02d0abd1a79545ce6667aa81a3e12223c6f59252388363cb (5HepaQmV...), target_account_at_bridged_chain: 3e96c805858b0ba5148b95ef1f449ebd10178f24a2d803a709fec4778d45b97a (5DUmcmGY...), target_account_at_this_chain: 51b28434fa1fa11381e16602a710bca57ac29395a9f801d61f8b51ea1ce2947d (5DupmQ1t...), swap_account: d481aea213db42b0fdd736512c6b70164d5a8cbd8c0fbd465a16ae899cc71b0b (5GsLXq8g...) }
INFO bridge Initial account balances: TokenSwapBalances { source_account_at_this_chain_balance: Some(1125899906842624), source_account_at_bridged_chain_balance: None, target_account_at_bridged_chain_balance: Some(1125899906842624), target_account_at_this_chain_balance: None, swap_account_balance: None }
TRACE bridge Sent transaction to Millau node: 0xdd2978294413ae03a509d6a90bf39dfb30765d7f5ea38ba8345916ffbfe2069713f15ad46c50589d37068077b9cf72da1679a9d74c33ff21588c393b1f9d899b
TRACE bridge Received intermediate status of Millau transaction: Some(Ready)
TRACE bridge Received intermediate status of Millau transaction: Some(Broadcast(["12D3KooWRh4Z6iXMyAdJK7hXuMCjwL5uur6K4ZJpbdgUXBupZJJq", "12D3KooWPLkJk1s1JsMrfLqCN1mGcH65nebp9f6mPBbFT1DFJRu1", "12D3KooWPswsQgEo79j7rMMWiLJB7n5QjkHzXr7EiAtj1BqvsNBv", "12D3KooWM5LFR5ne4yTQ4sBSXJ75M4bDo2MAhAW2GhL3i8fe5aRb"]))
TRACE bridge Received intermediate status of Millau transaction: Some(InBlock(0xf391752a82e4b42fb365267036d505452259d56cb2195361590fa3286e919881fe7b7a660155f739fa6faf1c63e57c379f60ab3d8edb6bb0af8b35648d537519))
TRACE bridge Millau transaction has been finalized at block 0xf391…7519
INFO bridge Swap has been successfully started
INFO bridge Intermediate balances: TokenSwapBalances { source_account_at_this_chain_balance: Some(1124891781842271), source_account_at_bridged_chain_balance: None, target_account_at_bridged_chain_balance: Some(1125899906842624), target_account_at_this_chain_balance: None, swap_account_balance: Some(8000000000) }
TRACE bridge Waiting for token swap state change
TRACE bridge Inspecting Millau block 12/0xf391…7519
TRACE bridge Inspecting Millau block 13/0x070a…1b03
TRACE bridge Inspecting Millau block 14/0x287b…4475
TRACE bridge Inspecting Millau block 15/0x6b8f…2436
TRACE bridge Inspecting Millau block 16/0x2902…61ae
TRACE bridge Inspecting Millau block 16/0x2902…61ae
TRACE bridge Inspecting Millau block 17/0x5d8d…63e9
TRACE bridge Inspecting Millau block 18/0xb2ff…5af3
TRACE bridge Inspecting Millau block 19/0xb1cb…b3fc
TRACE bridge Inspecting Millau block 20/0x5cb7…632f
TRACE bridge Inspecting Millau block 21/0x323b…d26c
TRACE bridge Inspecting Millau block 21/0x323b…d26c
TRACE bridge Inspecting Millau block 22/0x6847…0499
TRACE bridge Inspecting Millau block 23/0x8fa2…194d
TRACE bridge Token swap state has been changed from TokenSwapState::Started to Some(TokenSwapState::Confirmed)
INFO bridge Transfer has been successfully dispatched at the target chain. Swap can be claimed
INFO bridge Intermediate balances: TokenSwapBalances { source_account_at_this_chain_balance: Some(1124891781842271), source_account_at_bridged_chain_balance: Some(9000000000), target_account_at_bridged_chain_balance: Some(1125890708601381), target_account_at_this_chain_balance: None, swap_account_balance: Some(8000000000) }
TRACE bridge Waiting for token swap state change
TRACE bridge Inspecting Millau block 24/0x252e…4424
INFO bridge Claiming the swap swap
TRACE bridge Sent transaction to Rialto node: 0x7bef0378d270294663b925ad5bcb15a2ee37bfed61b2253015fae2af7233ae37
TRACE bridge Received intermediate status of Rialto transaction: Some(Ready)
TRACE bridge Received intermediate status of Rialto transaction: Some(Broadcast(["12D3KooWCcwZswYzBdjQRUtQhLjLaMJRDE59yxrghKFcwVU2zXnN", "12D3KooWSEpHJj29HEzgPFcRYVc5X3sEuP3KgiUoqJNCet51NiMX", "12D3KooWMa6z3o1GB9B2grBEy7AipYYbLgRGfmFg1rXf1r1QoMa2", "12D3KooWCc5tkKC8ehK5NjiaNqGbXUdqdFao5nLUKx6wwNGnsBQ9"]))
TRACE bridge Received intermediate status of Rialto transaction: Some(InBlock(0xf3dfddee160670c01a960baa3d537838a5b4bef7752a6132d12e276d9144dd35))
TRACE bridge Rialto transaction has been finalized at block 0xf3df…dd35
TRACE bridge Waiting for token swap state change
TRACE bridge Inspecting Millau block 27/0xc94b…afd6
TRACE bridge Inspecting Millau block 28/0xe9fd…782d
TRACE bridge Inspecting Millau block 29/0x56df…7753
TRACE bridge Inspecting Millau block 30/0xd325…67a8
TRACE bridge Inspecting Millau block 31/0xfff4…e198
TRACE bridge Token swap state has been changed from TokenSwapState::Confirmed to None
INFO bridge Final account balances: TokenSwapBalances { source_account_at_this_chain_balance: Some(1124891781842271), source_account_at_bridged_chain_balance: Some(9000000000), target_account_at_bridged_chain_balance: Some(1124889320609909), target_account_at_this_chain_balance: Some(8000000000), swap_account_balance: None }

[svyatonik]

There's a lot of code in this function - I've been trying to split it into several methods. But there's a problem - pallet calls are generic over runtime. So I need to pass runtime as generic arguments to these methods. But if this'll be extended to something behind Millau<>Rialto, then we won't have an access to the runtime => I've decided not to split it further.

I could also add call-craft functions to the select_bridge!() macro if that's unacceptable.

[tomusdrw]

Let's leave it like that for now, I think it will soon be replaced by XCM anyway, so this should be just an example for now.

[tomusdrw]

Let's leave it like that for now, I think it will soon be replaced by XCM anyway, so this should be just an example for now.