This commit extends the fix in #6518, so all other goroutine which run
concurrently with processBlockchainCh can safely send data to blockchain
out channel via a bridge channel. This helps eliminating all possible
data race with sending and closing blockchainCh.Out channel at the same
time.
Fixes#6516
Closes: #6661
Note: see another error during the events indexing, guess the raw tx size exceeds the limitation?
```
3:17PM ERR failed to index block txs err="pq: index row size 2768 exceeds btree version 4 maximum 2704 for index \"tx_results_tx_result_key\"" height=5205112 module=txindex
Bumps [github.com/spf13/cobra](https://github.com/spf13/cobra) from 1.2.0 to 1.2.1.
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<summary>Release notes</summary>
<p><em>Sourced from <a href="https://github.com/spf13/cobra/releases">github.com/spf13/cobra's releases</a>.</em></p>
<blockquote>
<h2>v1.2.1</h2>
<h3>Bug fixes</h3>
<ul>
<li>Quickfix for <a href="https://github-redirect.dependabot.com/spf13/cobra/issues/1437">spf13/cobra#1437</a> after v1.2.0 where parallel use of the <code>cmd.RegisterFlagCompletionFunc()</code> (and subsequent map) now works correctly and flag completions now work again</li>
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<summary>Commits</summary>
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<li><a href="de187e874d"><code>de187e8</code></a> Fix flag completion (<a href="https://github-redirect.dependabot.com/spf13/cobra/issues/1438">#1438</a>)</li>
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## Description
Expose p2p functions for use in the sdk.
These functions could also be copied over to the sdk. I dont have a preference of which is better.
Bumps [github.com/spf13/viper](https://github.com/spf13/viper) from 1.8.0 to 1.8.1.
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<h2>v1.8.1</h2>
<p>This patch releases fixes two minor issues:</p>
<ul>
<li>Replace <code>%s</code> with <code>%w</code> when wrapping errors</li>
<li>Fix <code>pflag.StringArray</code> processing</li>
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<li><a href="bd03865899"><code>bd03865</code></a> Add a proper processing for pflag.StringArray</li>
<li><a href="3fcad43618"><code>3fcad43</code></a> update %s to %w</li>
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## Description
It confused many people what they were supposed to add here. For chains with large genesis files you will only see the error after Initgenesis. Best to add a small sentence to provide better UX
At Oasis we have spend some time writing a new Ed25519/X25519/sr25519 implementation called curve25519-voi. This PR switches the import from ed25519consensus/go-schnorrkel, which should lead to performance gains on most systems.
Summary of changes:
* curve25519-voi is now used for Ed25519 operations, following the existing ZIP-215 semantics.
* curve25519-voi's public key cache is enabled (hardcoded size of 4096 entries, should be tuned, see the code comment) to accelerate repeated Ed25519 verification with the same public key(s).
* (BREAKING) curve25519-voi is now used for sr25519 operations. This is a breaking change as the current sr25519 support does something decidedly non-standard when going from a MiniSecretKey to a SecretKey and or PublicKey (The expansion routine is called twice). While I believe the new behavior (that expands once and only once) to be more "correct", this changes the semantics as implemented.
* curve25519-voi is now used for merlin since the included STROBE implementation produces much less garbage on the heap.
Side issues fixed:
* The version of go-schnorrkel that is currently imported by tendermint has a badly broken batch verification implementation. Upstream has fixed the issue after I reported it, so the version should be bumped in the interim.
Open design questions/issues:
* As noted, the public key cache size should be tuned. It is currently backed by a trivial thread-safe LRU cache, which is not scan-resistant, but replacing it with something better is a matter of implementing an interface.
* As far as I can tell, the only reason why serial verification on batch failure is necessary is to provide more detailed error messages (that are only used in some unit tests). If you trust the batch verification to be consistent with serial verification then the fallback can be eliminated entirely (the BatchVerifier provided by the new library supports an option that omits the fallback if this is chosen as the way forward).
* curve25519-voi's sr25519 support could use more optimization and more eyes on the code. The algorithm unfortunately is woefully under-specified, and the implementation was done primarily because I got really sad when I actually looked at go-schnorrkel, and we do not use the algorithm at this time.