Remove g_rpc_chain global #19096

pull ryanofsky wants to merge 2 commits into bitcoin:master from ryanofsky:pr/wc changing 7 files +90 −28
  1. ryanofsky commented at 6:04 pm on May 28, 2020: member

    Replace with RPC request reference to new WalletContext struct similar to the existing NodeContext struct and reference.

    This PR is a followup to #18740 removing the g_rpc_node global.

    Some later PRs will follow this up and move more wallet globals to the WalletContext struct.

  2. refactor: replace RegisterWalletRPCCommands with GetWalletRPCCommands e783197bf0
  3. Remove g_rpc_chain global
    Replace with RPC request reference to new WalletContext struct similar to the
    existing NodeContext struct and reference.
    
    This PR is a followup to 25ad2c623af30056ffb36dcd203a52edda2b170f
    https://github.com/bitcoin/bitcoin/pull/18740 removing the g_rpc_node global.
    
    Some later PRs will follow this up and move more wallet globals to the
    WalletContext struct.
    
    Co-authored-by: João Barbosa <joao.paulo.barbosa@gmail.com>
    4a7253ab6c
  4. MarcoFalke added the label Refactoring on May 28, 2020
  5. MarcoFalke added the label Wallet on May 28, 2020
  6. practicalswift commented at 7:10 pm on May 28, 2020: contributor
    Concept ACK
  7. DrahtBot commented at 9:07 pm on May 28, 2020: member

    The following sections might be updated with supplementary metadata relevant to reviewers and maintainers.

    Conflicts

    Reviewers, this pull request conflicts with the following ones:

    • #19100 (refactor: Combine GetWalletForJSONRPCRequest and EnsureWalletIsAvailable functions by ryanofsky)
    • #18923 (wallet: Never schedule MaybeCompactWalletDB when -flushwallet is off by MarcoFalke)
    • #18354 (Use shared pointers only in validation interface by bvbfan)

    If you consider this pull request important, please also help to review the conflicting pull requests. Ideally, start with the one that should be merged first.

  8. in src/interfaces/wallet.cpp:498 in 2058621ed3 outdated
    496+        for (const CRPCCommand& command : GetWalletRPCCommands()) {
    497+            m_rpc_commands.emplace_back(command.category, command.name, [this, &command](const JSONRPCRequest& request, UniValue& result, bool last_handler) {
    498+                util::Ref context{m_context};
    499+                JSONRPCRequest wallet_request{context};
    500+                wallet_request = request;
    501+                return command.actor(wallet_request, result, last_handler);
    


    promag commented at 10:18 pm on May 28, 2020:
    Instead of adding the operator= (which doesn’t copy m_context) maybe overload constructor so that here would be return command.actor({request, m_context}, result, last_handler). I’ve pushed 5e433dcb6fc3106281d14330879acf0ef1160b62 with this suggestion.

    ryanofsky commented at 4:28 am on May 29, 2020:

    re: #19096 (review)

    Instead of adding the operator= (which doesn’t copy m_context) maybe overload constructor so that here would be return command.actor({request, m_context}, result, last_handler). I’ve pushed 5e433dc with this suggestion.

    Thanks, that’s a better approach. Merged the two commits

  9. in src/wallet/rpcwallet.cpp:128 in 2058621ed3 outdated
    122@@ -121,6 +123,14 @@ void EnsureWalletIsUnlocked(const CWallet* pwallet)
    123     }
    124 }
    125 
    126+WalletContext& EnsureWalletContext(const util::Ref& context)
    127+{
    128+    if (!context.Has<WalletContext>()) {
    


    promag commented at 10:25 pm on May 28, 2020:
    Why not assert(context.Has<WalletContext>()) for now?

    ryanofsky commented at 4:36 am on May 29, 2020:

    re: #19096 (review)

    Why not assert(context.Has<WalletContext>()) for now?

    Not sure what the advantages of asserting would be. I do think not aborting would be a little better but mostly just want EnsureWalletContext to be consistent with EnsureNodeContext and other Ensure methods.


    promag commented at 12:33 pm on May 29, 2020:
    Is it possible to hit this exception?

    MarcoFalke commented at 12:37 pm on May 29, 2020:

    assert can not be used in rpc code. See

    0test/lint/lint-assertions.sh:# Macro CHECK_NONFATAL(condition) should be used instead of assert for RPC code, where it
    
  10. promag commented at 10:26 pm on May 28, 2020: member
    Approach ACK, just two comments before ACK code change.
  11. ryanofsky force-pushed on May 29, 2020
  12. ryanofsky commented at 12:25 pm on May 29, 2020: member

    Thanks for simplification and review

    Updated 2058621ed33c8ffc113f6363bc91cae52fca4f73 -> e1cfcd4cf82bd7c62e95a4e80bead3cac08afdf0 (pr/wc.1 -> pr/wc.2, compare) with suggested change

  13. promag commented at 11:38 pm on May 31, 2020: member
    ACK e1cfcd4cf82bd7c62e95a4e80bead3cac08afdf0.
  14. in src/rpc/request.h:56 in e1cfcd4cf8 outdated
    51+        , params(other.params)
    52+        , fHelp(other.fHelp)
    53+        , URI(other.URI)
    54+        , authUser(other.authUser)
    55+        , peerAddr(other.peerAddr)
    56+        , context(context) {}
    


    MarcoFalke commented at 1:53 pm on June 1, 2020:
    style-nit: I don’t think this is valid clang-formatted code hides

    ryanofsky commented at 3:33 pm on June 1, 2020:

    re: #19096 (review)

    style-nit: I don’t think this is valid clang-formatted code hides

    Ran clang-format

  15. in src/wallet/rpcwallet.cpp:4344 in e1cfcd4cf8 outdated
    4340@@ -4329,9 +4341,5 @@ static const CRPCCommand commands[] =
    4341     { "wallet",             "walletprocesspsbt",                &walletprocesspsbt,             {"psbt","sign","sighashtype","bip32derivs"} },
    4342 };
    4343 // clang-format on
    4344-
    4345-    for (unsigned int vcidx = 0; vcidx < ARRAYLEN(commands); vcidx++)
    4346-        handlers.emplace_back(chain.handleRpc(commands[vcidx]));
    4347+    return MakeSpan(commands);
    


    MarcoFalke commented at 1:54 pm on June 1, 2020:
    Would it be possible to do just this change in the first commit and all other changes in the second commit? If yes, that should simplify review. If no, I will take another look.

    ryanofsky commented at 3:33 pm on June 1, 2020:

    re: #19096 (review)

    Would it be possible to do just this change in the first commit and all other changes in the second commit? If yes, that should simplify review. If no, I will take another look.

    Moved to new commit


    MarcoFalke commented at 2:34 pm on June 2, 2020:
    Thanks for splitting up. This made the review easier for me.
  16. MarcoFalke approved
  17. MarcoFalke commented at 1:54 pm on June 1, 2020: member
    Concept ACK e1cfcd4cf82bd7c62e95a4e80bead3cac08afdf0
  18. ryanofsky force-pushed on Jun 1, 2020
  19. ryanofsky commented at 5:01 pm on June 1, 2020: member

    Thanks for review!

    Updated e1cfcd4cf82bd7c62e95a4e80bead3cac08afdf0 -> 4a7253ab6c3bb323581cea54573529c2f823f035 (pr/wc.2 -> pr/wc.3, compare)

  20. in src/wallet/context.h:12 in 4a7253ab6c
     7+
     8+namespace interfaces {
     9+class Chain;
    10+} // namespace interfaces
    11+
    12+//! WalletContext struct containing references to state shared between CWallet
    


    ariard commented at 11:38 pm on June 1, 2020:
    If it has to contain references for multiple wallet why not call it WalletsContext ? We have one node but maybe multiple wallets connected to it.

    ryanofsky commented at 11:00 am on June 4, 2020:

    re: #19096 (review)

    If it has to contain references for multiple wallet why not call it WalletsContext ? We have one node but maybe multiple wallets connected to it.

    I think using “wallets” instead of “wallet” is good where it can prevent ambiguity and misuse (https://github.com/bitcoin/bitcoin/pull/12221), but using plural where a name might apply to more than one object doesn’t always sound right (hairscut, sailsboat) and can create confusion on its on (-disablewallets, -walletsnotify) because it can imply some instead of all. In this case, I think wallets is more distracting and doesn’t sound right.

  21. ariard commented at 11:41 pm on June 1, 2020: member

    Code Review ACK 4a7253a, feel free to ignore comment it’s super nit.

    Thanks to removing global in RPC, I think it would make it simpler to remove RPC methods from the Chain interface, and have the wallet listen on its own ports?

  22. MarcoFalke commented at 2:33 pm on June 2, 2020: member

    ACK 4a7253ab6c3bb323581cea54573529c2f823f035 🎋

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    Timestamp of file with hash 4ff2c313852eb5872f3d1eec1aa996276e07d1a8f4efe878195311834e130a3c -

  23. MarcoFalke commented at 12:11 pm on June 5, 2020: member
    @ryanofsky What is the status of this? I am currently undecided on whether to send this into rebase hell or merge.
  24. ryanofsky commented at 12:26 pm on June 5, 2020: member

    re: MarcoFalke #19096 (comment)

    @ryanofsky What is the status of this? I am currently undecided on whether to send this into rebase hell or merge.

    Status is fine to merge as far as I know. It doesn’t seem to conflict with very much #19096 (comment):

    • #19100 (refactor: Combine GetWalletForJSONRPCRequest and EnsureWalletIsAvailable functions by ryanofsky)
    • #18923 (wallet: Never schedule MaybeCompactWalletDB when -flushwallet is off by MarcoFalke)
    • #18354 (Use shared pointers only in validation interface by bvbfan)

    re: ariard #19096#pullrequestreview-422249745

    Thanks to removing global in RPC, I think it would make it simpler to remove RPC methods from the Chain interface, and have the wallet listen on its own ports?

    Adding listening ports is a good idea and has been suggested before. It’s true that if it were implemented and backwards compatibility were dropped this PR would be slightly simpler. But I wouldn’t want to implement a new feature and break existing usage cases just to remove a global variable.

  25. MarcoFalke merged this on Jun 5, 2020
  26. MarcoFalke closed this on Jun 5, 2020

  27. sidhujag referenced this in commit a7b3468226 on Jun 5, 2020
  28. domob1812 referenced this in commit 1b6396d2b8 on Jun 8, 2020
  29. domob1812 referenced this in commit a54f2d44ad on Jun 8, 2020
  30. Fabcien referenced this in commit c6525a59b6 on Dec 7, 2020
  31. DrahtBot locked this on Feb 15, 2022

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