We select a peer to ask a block randomly. Peer's send channel has
capacity 10. If we need too many blocks we limit number of blocks to asks as a number of peers
* 10, which means that there is some probability (pretty high) that we
will overflow send buffer capacity.
This fix freezes a peer list (which gives also some performance boost)
and create a cycle iteraror to equally distribute requests among the
peers.
There is a risk that a peer may be disconnected while we are sending a
request to the chanel, but stricltly speaking it was possible in the old
code too, perhaps with a lower probability.
Fixes#1748
* header MMR in use within txhashset itself
works with fast sync
not yet in place for initial header sync
* add the (currently unused) sync_head mmr
* use sync MMR during fast sync
rebuild header MMR after we validate full txhashset after download
* support missing header MMR (rebuild as necessary) for legacy nodes
* rename to HashOnly
* cleanup backend.append()
* simplify vec_backend to match simpler append api
* header MMR in use within txhashset itself
works with fast sync
not yet in place for initial header sync
* add the (currently unused) sync_head mmr
* use sync MMR during fast sync
rebuild header MMR after we validate full txhashset after download
* support missing header MMR (rebuild as necessary) for legacy nodes
* rustfmt
* comments/docs
* rustfmt
* cleanup DBBackend
* cleanup DBBackend
* cleanup
* rename to HashOnly
* rustfmt
* cleanup backend.append()
* simply pmmr append api
no need to pass position when appending
* cleanup
* simplify vec_backend to match simpler append api
* rustfmt
* docs/comments
* rustfmt
* cleanup
* Use secp crate directly without extra use statement (#1738)
(cherry picked from commit 80d28f94ea)
* suppress the test error of test_start_api. Note: this is not a fix.
(cherry picked from commit 6f29685daf)
* First pass at secondary proof of work difficulty adjustments
* Core and chain test fixes
* Next difficulty calc now needs a height. Scaling calculation fixes. Setting scaling on mined block.
* Change factor to u32 instead of u64.
* Cleanup structs used by next_difficulty
* Fix header size calc with u32 scaling
* fix: avoid a confusing log when fastsync start (#1720)
(cherry picked from commit 4f462cdfdc)
* small speed optimization for header sync (#1719)
(cherry picked from commit d3589d1bf5)
* change keychain to use bip32 paths
* convert keychain to use bip32
* change identifier to be serialisation of 4-level bip32 path
* wallet changes compiling, pass parent key into all wallet functions
* rustfmt
* fix tests in chain
* rustfmt
* core tests passing
* rustfmt
* pool tests
* rustfmt
* fixing wallet tests
* rustfmt
* remove file wallet
* wallet tests compiling
* rustfmt
* remove db_migrate
* successful tx exchange test using BIP32 paths
* rustfmt
* fix wallet derivation paths to m/0/0/0
* wallet test fixed again, working with default path
* rustfmt
* fix server tests
* rustfmt
* make parent_id a trait on walletbackend
* rustfmt
* add ability for wallet to switch between multiple named accounts, and tests (not complete)
* rustfmt
* account switching tests in place and passing
* rustfmt
* compile and test with latest libsecp changes
* added public key sum to calculated e for aggsig
* rustfmt
* Update secp to 26
* bulletproof bip32 path integration
* rustfmt
* wallet restore updated with bip32 paths, also restores accounts
* rustfmt
* rustfmt
* remove old extkey
* remove old extkey
* rustfmt
* add wallet account commands
* rustfmt
* update wallet documentation
* rustfmt
* merge from master
* update libsecp tag
* merge from upstream and fix server test
* rustfmt
* rustfmt
* merge from master
* update latest libsecp merge
* fix commitment to zero value generation
