changelog.txt

1.9.5:
* Client: Removed automatic conversion of old format unspent4 to the new UTXO.db
* Client: If pong comes out but a block is still pending, timeout it and dont ask this peer for blocks again.

1.9.4 - 2018-04-11
NOTE: Use older wallet version (e.g. 1.9.3) if you had wallet type 2 or 4 already generated, but have problems spending from it now.

* Added support for native segwit addresses (P2WPKH and P2WSH)
* Client: Removed extra code added to investigate "the main loop got stuck in network.Tick()" problem (seems to be fixed now)
* Client: Fixed problem with calculating insanely high average fee (seen on testnet @ block 1256442)
* Client: When fetching balance, download missing txs from www also for testnet
* "lib/ltc" package moved to "lib/others/ltc"
* Tools/Balio: Suports LTC and Testnet again
* WebUI: Changed the string to look for inside the wallet from "Auto-translate to SegWit" to "SegWit" or "SegWit P2SH"
* WebUI/Transactions: auto refresh "Own TXs" after bloadcasting a tx
* WebUI/Transactions: Show accumulated VSize() on X-axis (insted of accumulated raw size of the txs)
* Lib: fixed issue #32 (Broken private key padding)
* Completely removed support for stealth addresses
* Client: store length of wallet's balance maps (in "mapsize.gob") for time and memory optimization on next boot
* Client: improved time of loading mempool from disk
* Client: "friends.txt" file moved to the data directory
* Client/WebUI/Transactions: Use transaction weights, instead of VSize
* Client: mempool code spread across several files
* Client: mempool improved algorithm for sorting mempool (e.g. added child-pays-for-parent)
* Client/WebUI/Transactions: Use Quick (less bandwidth consuming) mode for "Memory Pool" charts
* WebUI/Home: Show the fee chart when clicked on a block's dot
* "lib/qdb" package moved to "lib/others/qdb"
* Client/TextUI: New command "txmpload" to load new transactions from "mempool.dmp" file (created by "txmpsave")
* Do not build block's OldData / NoWitnessData when not needed
* client: new config value "Memory.CacheOnDisk" to store blocks on disk (instead of RAM) during initial chain sync
* Support for automatic purging of old blocks from the disk - config via "Memory.MaxDataFileMB"  and "Memory.DataFilesKeep"
* Tools/bdb - the tool can now work with the new blocks database format (e.g. can split "blockchain.dat" into smaller chunks)
* Client: Do not sent "notfound" mesages, as core does not
* Client: "cmpctblock" handler also takes data from TransactionsRejected
* Client: Changes in mempool around how rejected transactions are expired and when their raw data is kept
* Client: New commands: "getmp" and "auth" - used for fetching/serving entire mempool from/to a trusted gocoin node
* Client: Assume blocks and txs received from authoried peers as trusted
* Client: Wallet is being loaded in the background after the chain sync is finished
* Client: New config value "LastTrustedBlock" used to speed up initial chain sync.
* Lib/utxo: Largely improved speed of Unspent.UnspentGet()
* Client: Improved the timing of aborting UTXO saving, resulting in faster processing of new blocks
* Client: If BlockDB does not find a .dat file, it will try to look again for it in "oldat/" folder (make it a link to keep old blocks on different drive)
* Client/WebUI/Network: Improved bandwidth usage chart
* Client: New config value "TXRoute.MemInputs", enables routing of transactions which spend unconfirmed inputs
* Client: When memory pool is enabled the node automatically sends "getmp" messages to authorized peers
* Client: New config value "Memory.UseGoHeap", forces node to use native go heap for UTXO records

1.9.3 - 2017-12-26
* Client: Removed a rare deadlock that could happen in network.AddB2G() on Mutex_net.Lock()
* Client: Fixed problem with returning the same command again by OneConnection.FetchMessage()
* Wallet: New command line switch "-stdin" to get the seed password from stdin
* Wallet: New command line switch "-txfn <filename>" to control the name of the output transaction file
* Client: Check nonce inside each version messages and disconnect the peer if already had it
* Client: Redone protection os accessing values in "common" package, to prevent data race
* Lib: "chain.BlockTreeEnd" is now only accessible through multi-thread protected methods LastBlock() and SetLast()
* Client: Added network.CompactBlocksMutex to prevent data race
* Client/WebUI/MakeTx: For privacy, randomly modify the default SPB by up to +/- 10%
* Client/WebUI/Network: Allows to edit "friends.txt" file
* Client: Data is being written to peer TCP connections from a desigated threads
* Client: And peer that you connect to manually, automatically gets marked as Special (no auto-dropping)
* Client: Automatically connect to IPs from file "friends.txt" (inside the client/ folder)
* Client/WebUI/MakeTx: Show P2SH-WPKH instead of P2KH, only if currently selected wallet contains "# Auto-translate to SegWit"
* Client/WebUI/MakeTx: Address Book shows auto calculated P2SH-WPKH Addresses from currently selected wallet
* Client: Show real endpoint's TCP port for incomming connections
* Client: Run Tick() method for each peer not more often than each 100 ms
* Client: Run SendInvs() method for each peer not more often each 10 ms
* Client: Increased size of each peer's send buffer to 16MB (so it can handle 8MB blocks)
* Client/TextUI: New command "unban"
* Client: Removed NO_DATA timeout and added NoVersionMessage timeout
* Client: Introduced a concept of "special" peers that get more debugging and never get dropped
* Lib: The best chain is now decided on the amount of POW, not the height anymore
* WebUI/Network: New option "Connect Peer", to connect to a peer with the given IP[:port]
* Lib: CheckTransactions now returns descriptive errors (e.g. "bad-txns-vin-empty")
* Client: Added 2x bigger block consensus change warning (segwit2x)
* Client/WebUI/Net: New "Freeze stats" option and manual refresh buttons
* Wallet: disallow uncompressed keys, for WPKH segwit address safety
* Client: Ignore the value of MAX_GETDATA_FORWARD when there are no blocks in progress
* MarshalText() method madded to "sys.SyncBool" and "sys.SyncInt" (fixes WebUI issue)
* Got rid of btc.MAX_BLOCK_SIZE (replaced it with btc.MAX_BLOCK_WEIGHT)
* Lib: New "utils.GetUnspent()" function to fetch a balance from "blockexplorer.com" or "blockchain.info"
* Tools/BalIO: Remade to use blockexplorer.com since blockr.io isn't working any more
* Client/WebUI/Blocks: Show fee statistics in relation to transactions' weight, not the size
* Client: NetRouteInv() was only routing txs to peers which don't use "feefilter"
* Wallet: decode transaction also shows WTxID now
* Lib: calculates weight of blocks and checks it against "btc.MAX_BLOCK_WEIGHT"

1.9.2 - 2017-09-30
* Minor performance improvements in "lib/secp256k1"
* Client: do nothing on "verack" messages
* Fixes of some DATA RACE warnings (not really dangerous ones, but just to shut up the race detector)
* Lib: protect cached hash fields with a mutex, within tx.WitnessSigHash()
* Client: Do not talk to peers that send any commands before "version"
* Client: Default value of "CFG.Net.MinSegwitCons" changed to 4
* Client: Do not drop segwit peers when connected ot less then CFG.Net.MinSegwitCons
* Client: When loading a local transaciton, remove it from Rejected first
* Client: Never send "inv" messages with MSG_WITNESS_TX type
* Client/WebUI/Txs: Allow sorting Txs by SegWit compression factor
* Client: the handler to chain.TrustedTxChecker also checks match on tx's WTxID now.
* Tools/bdb: new switch "-fixlen" to set up the uncompressed size of each block inside blockchain.new
* Client: BlocksDB index file contains now also the uncompressed size of each block
* Client/WebUI/Wallet: Export settings stores entire local storage
* Client/WextUI: "balance" command lists mempool transaction related to the given address
* Client/WebUI: POST to "balance.json?rawtx" returns the raw (originating) transaction for each output
* Wallet: Fix: "-f" was substracting the fee from every output's value, not only the first one
* Client: Changed/fixed the way how own txs are inserted into mempool (e.g. it wasn't updating SpentOutputs)
* Client/WebUI/Wallet: Show unconfirmed transactions
* Client/WebUI/MakeTx: pay_cmd inside will not apply changes to the balance folder
* Client: changed the way freshly mined txs are removed from mempool so it also works for reorgs
* Client/WebUI/Network: Make some extra information about the nodes switchable on/off
* Client: Show number of records (txs) while loading UTXO.db
* Client/WebUI/Blocks: Removed minimum fee from the block table. Moved to the fee stats chart, also added maximum
* Client: show progess of loading/saving balance of P2KH/P2SH addresses
* Client: removed "config.Beeps" and all the related beeping functionality
* Client/WebUI/Blocks: transactions in the fee stats can be grouped now to smooth the graph
* Client: fee stats fpor WebUI/Blocks are being saved now
* Client/WebUI: "Limit range" checkbox added to SPB graphs
* Client: Fixed problem with expiring mempool txs too soon because of overflowing ints
* Client: Minimum fee per byte (for mempool and routing) is a floating point value now
* Client: Send "feefilter" massage to all the peers whenever minimum fee per byte changes
* Client: New config file parameter "TXPool.MaxSizeMB", to keep memory pool at a certain level
* Client/TextUI: New "wallet" command allow to switch wallet functionality on and off without restarting


1.9.1 - 2017-08-01
* Client: Removed AnySendTimeout as it was causing problems with limited UL bandwidth
* Client/WebUI: The font is set to Arial
* Client/WebUI/Network: Show how long each connection has been active and removes lest sent/rcvd command
* Client: Write new blocks and UTXO set to disk 2 seconds after the last successfull AcceptBlock()
* Client/WebUI/Blocks: The block's fee chart appears as a popup now
* Client/WebUI: Pressing ESC closes popups
* Client/WebUI: Removed Segwit related statistics
* Client/WebUI/Wallet: Show Segwit deposit addresses if segwit is active
* Client: WebUI/Blocks shows new blocks' extended fee stats
* Added support fro BIP91 in chain.PreCheckBlock() as well as on WebUI (mining info)
* LIb: fixed panic in chain.NewChainExt() when called with nil options (used by importblocks tool)
* Client: When calculating initial average block size, assume MAX_BLOCK_SIZE for the purged ones
* Client: changed configuration related data
* Client: Changed rules of choosing the "slowest" peer to drop
* Client/WebIO: shows New York Agreement support related info in "Block" and "Miners" tabs
* Client: "SaveOnDisk" config option for "TXPool" and "AllBalances" (defaults to false)
* Client: save mempool on exit and load in on startup
* Client: on close save all balances to "balances.db" (for quicker start next time)
* Client: adding of a new block to block's db is accounted inside the queue time statistics
* Client: abort saving of UITXO.db before starting to precess a new block
* Added some protection against nodes sending own IP instead of ours (bitcointalk.org/index.php?topic=1954151.0)
* Node's TxsReceived stat only counts the last hour
* "btc.Uint256IdxLen" and "utxo.UtxoIdxLen" set back to 8 bytes, to decrease memory usage
* Client: fixed the way best external IP is selected
* WebUI/Txs: Limit memory pool fees graph to first 10 MB
* WebUI: Do not display wallet name(s) in each tab's header (privacy)
* WebUI/Blocks: Dispaly either mining info or block processing info
* client/wallet: Use hashmap (instead of list) for addresses with "CFG.AllBalances.UseMapCnt"+ unspent outputs
* WebUI: Do not show Wallet and MakeTx tabs in NoWallet mode
* WebUI/Wallet: Show QR code when clicking on the address

1.9.0 - 2017-05-05
* Got rid of "qdb" for UTXO.
* New package "lib/utxo" extracted from "lib/chain"
* Announce a new block to peers before its fully verified (like Core 0.14.0 / net protocol 70015)
* bdb: -purgeto <block_height> to purge all blocks up to given height
* client: does not offer to import core's blocks-db anymore
* Optimized the way new blocks are written to disk (verification should be faster now)
* Client: New TextUI command "purge", to purge unspendable records from UTXO-db
* New tool "fetchblock" and new functions in "lib/others/utils" for fetching raw blocks from the web
* UTXO index has now configurable length (via "lib/utxo/UtxoIdxLen"), to address possible collision attacks (now set to 16 bytes)
* Block index increased to 16 bytes, to address possible collision attacks
* Client: Fixed "ConnectOnly" mode
* WebUI: Show MinValue for accounted outputs on "Wallet" and "MakeTx" tabs
* Client: New config value FreeAtStart, to free all possible memory after initial loading of block chain
* WebUI/Wallet: Fixed problem with switching to different wallet while balance for previous none is still being fetched
* Client: the balance of all the addresses is fetched after the blockchain finishes loading. It saves memory and speeds up potential rescans

1.8.1
* Client: each call to common.BlockChain.DeleteBranch() also does DelB2G() recursively
* WebUI: Added (switchable) sound notifications when a new block is mined
* Client: Support for new config value "WebUI.ServerMode" - many users to share the same node
* WebUI/Miners: Redone
* WebUI: When a block with a wallet's unspent tx is purged from blockchain.dat, the raw tx gets fetched from the web
* WebUI/Wallet: Fixed error "Form submission canceled because the form is not connected"
* Client: enable it to work with purged blockchain.new/blockchain.dat
* bdb: -purgeall to purge all the blocks from blockchain.new (delete blockchain.dat manually)
* Client: added some BU-singnalling related stats

1.8.0 - 2017-02-06
* Segregated Witness related functionality and many other changes here and there
* Client: drop_worst_peer - do not drop peers that send new transactions
* Client: Requires new consensus lib (from bitcon-core 0.13.1)
* Client: Added "-trust" switch, with which client should be as fast as downloader
* Downloader: replaced by "client -trust" and removed from the source base
* The concept of "dust" outputs has been removed. Only the fees are important.

1.7.4
* Lib: Fixed rejecting of too big blocks
* Client: Added TX_REJECTED_RBF_100 to the rejection reasons
* WebUI/Blocks: Show lowest fee's SPB in the recently processed blocks

1.7.3 - 2016-10-18
* Client: Properly handle new blocks comming from Cornell-Falcon-Network
* Client: Fixed excessive memory usage when synchronizing large amount of blocks
* Client: Added mutex locks around reading of conn's GetBlockInProgress map
* Client: Added OneConnection.Maintanence() method, to be called every minute
* Client: Peer's BlocksReceived are now expired after 48 hours.
* Client: Parameters for droping slowest peers are now configurable via gocoin.conf

1.7.2 - 2016-09-27
* Client: drop_slowest_peer changed to drop_worst_peer - do not drop peers that send new blocks
* WebUI: "Blocks" tab shows some new statistics
* Client: Keep per-peer list of the last 500 invs, to avoid duplicate sending
* "Version" moved from "github.com/piotrnar/gocoin/lib" to "github.com/piotrnar/gocoin"
* Leave external dependencies (siphash, snappy, ripemd160) to be dealt with by "go get"
* Client: support for BIP-152 - "Compact Block Relay"

1.7.1 - 2016-08-22
* Client: WebUI/MakeTX - display raw transaction after clicking no the ID.
* Client: "common.CFG.AllBalances.MinValue" is only applied during init now (change it restart to apply)
* Downloader: fix loosing the content of *btc.Block structure between PreCheckBlock() and PostCheckBlock()
* Client: shows text messages attached to transactions (the first push after OP_RETURN)
* Downloader: fix for getting stuck at fetching headers if the top would happen to be orphaned
* Client: WebUI - "balance.json" support "summary" (to not include list of unspent outputs)
* Client: WebUI/MakeTX - fixed sorting of outputs by block height
* Client: records in balance/unsepnt.txt (inside balance.zip) are sorted by block height
* Client: New TextUI command "unspent"
* Client: P2SH and P2KH balance indexes are kept in separate maps
* Client: support for BIP 133 ("feefilter" messages)
* Client: responds at most once to a getaddr request during the lifetime of a connection
* Client: expire peer's GetBlockInProgress after one hour
* WebUI: new buttons "Move left" & "Move right" in "Wallet" tab, for sorting order of the wallets

1.7.0 - 2016-07-24
* AllBalances mode - enabled by config value AllBalances
* WebUI: Import / export wallets form/to a JSON file
* Switched off support for stealth addresses
* Client: do not try to commit a block until all off its parents are done - added HasAllParents() method
* Client: CommitBlock() returns error, discard all the blocks that depend on it - added network.DiscardedBlocks
* Wallet: "-p2sh <hex>" command can be used with "-input <int>" to alter only a single input of the transaction
* WebUI: Option to show averaged value of the blocks' sizes, tx counts, SPBs

1.6.4 - 2016-06-27
* Use trully volatile, quickly switachable wallets from WebUI (requires 1.5GB more RAM)
* Changed the first parameter to NotifyTxDel() to be more descriptive (than just TxID)
* Do not use VER_LOW_S for now (to verify mempool txs) as it is baning some peers
* Enforce CVS verification for blocks height 417312 or higher (not for testnet)
* Implemented BIP113 (Median time-past as endpoint for lock-time calculations)
* New TextUI command "bip9" - extracts BIP9 relevant info from the current chain

1.6.3 - 2016-05-28
* Lib: Inteface to TheBlueMatt's block_validator tests - see https://github.com/piotrnar/btc_block_validator
* WebUI/Miners: Removed BIP100 voting stats
* WebUI/Miners: Block version numbers are shown in a table, from a span of the consensus window
* Wallet: use sequence value of 0 for RBF type transactions (instead of unix timestamp as before)
* WebUI/MakeTx: Default sequence value changed to 0 and added "Final" checkbox
* WebUI/Transactions: Shows processing time of the txs and which are RBF enabled (non-final)
* Client: Implemented Replace-By-Fee for the memory pool
* Removed support for "alert" messages
* Tools/fetchtx: updated to the latest block explorers API
* Lib/script: added support for OP_CHECKSEQUENCEVERIFY opcode (enabled by VER_CSV flag) - BIP-112
* Lib/script: added support for all core's verification flags and updated the test suite to the latest one
* New tool "verify_tx.go", usefull for debugging scripts

1.6.2 - 2016-04-12
* Client: fixed crash on calling the consensus lib with empty pkscript
* Lib: Several compatibility fixes in the consensus checks on the block level
* Client: getheadres uses genesis block if no locator has been found
* Qdb: Memory bindings for Windows and Linux are being used automatically
* Client: each input's script is checked in a parallell for accepting tx to mempool
* Lib: simplified the way tx's inputs are checked in parallell goroutines

1.6.1 - 2016-04-06
* Client: network queue for txs processing increased to 2000
* Client: WebUI/Transactions - The fees chart shows age of a transaction (on hovering)
* Downloader: excessive memory consumption shall no longer be an issue
* Client: some changes in how the core's consensus lib is called, as it had been giving false positives

1.6.0 - 2016-03-30
* Client: added option to use bitcoin's consensus lib for ensuring that scripts are processed properly
* Qdb: Writing the entire database content (e.g. during defrag) is much faster now
* Client: peer's send buffer made as a static circular buffer (with max size of 4MB)
* Client: improved bandwidth statistics
* New tool "bdb", for managing and deframenting the blocks database
* Lib: check each new block for MAX_BLOCK_SIGOPS
* Lib: check for merkle tree malleability (CVE-2012-2459) when accepting block
* Client: RPC API for mining (supports "getblocktemplate", "validateaddress" and "submitblock")
* Lib: fixed a critical issue of accepting a block hash which does not match the bits field from teh header
* Lib: fixed issue with recalculating difficulty each 2016 blocks that was appearing on testnet3
* Lib: script.VerifyTxScript() counts number of sigops when called with COUNT_SIGOPS flag
* Updated snappy package to the latest version from https://github.com/golang/snappy

1.5.0 - 2016-03-16
* Client: Fixed maximul allowed message size for "getheaders" that was causing issues on testnet
* Client: Do not allow into the mempool transactions spending inmature coinbase inputs
* WebUI: Allows to specify the sequence number for Replace By Fee feature
* Wallet: By default tx's sequence numbers are same as currrent unix time. Can be overwritten with "-seq <val>"
* Client: Additional mining statistics
* Client: support for Web Wallets (volatile wallets provided by the browser, not kept on the server)
* Client: Implemented BIP 130 - Direct headers announcement
* Qdb: added "volatile mode" in which records are being written to disk only when closing the database
* Client: "client -r" rebuilds UTXO database in a volatile mode (should be much faster) and exits
* Headers-first blockchain sync
* ripemd160 and snappy libs has been included in the sources (GitHub repo)

1.4.1
* WebUI: More of teal time UI refresh (without reloading the pages)
* secp256k1: Fixed issue #15 - BaseMultiply returning wrong result for certain input values

1.4.0 - 2015-11-09
* peersdb: MinPeersInDB changed from 256 to 512
* Client: Added BIP100 stats to the mining UI
* Wallet: Added support for Type-4 wallet, which is based on BIP-32 keys derivation (HD wallets)
* Lib: Some changes to btc.WalletHD API
* WebUI: Real time UI refresh (without reloading the pages)
* Client/WebUI: Fixed double bug that occurred when switching "Listening for incoming TCP connections" on/off
* secp256k1: Force Low S values in ECDSA Sign function
* OP_CHECKLOCKTIMEVERIFY - BIP65 integreated into blocks version 4

1.2.0 - 2015-07-31
* Lib: enforce blocks version 3, starting from #364000
* WebUI: LoadTx shows only own transactions
* WebUI: Fixed transaction upload form at the Home tab
* WebUI: Transactions tab has an option to only show "own" transactions
* WebUI: Miners tab shows fee statistics
* Fix: peers DB getting empty after disconnecting the network (keep at least 256 records)
* Fix: BlockChain.BlockIndexAccess wasn't being unlocked when a panic from FindPathTo() was handled
* Lib: reject old version blocks based on the super-majority principles
* Lib: implemented BIT-0066

1.1.0 - 2015-06-12
* Client: configuring "Walletdir" to allow improved privacy of the wallets
* Downloader: look for "Datadir" in "gocoin.conf" or "../client/gocoin.conf"
* Client: the Blocks page of WebUI shows version of the recent blocks
* Fix for issue #12 (Snappy URL changed)

1.0.3 - 2015-03-27
* Fix: GetHeaders for orphaned block does not cause panic anymore
* Fix: Github issue #11 (panic when first time run client)

1.0.2 - 2015-01-02
* Fix: GetHeaders for unknown block does not cause panic anymore
* Fix: Index out of range in "client/usif/webui/wallets.go" seen when quickly switching wallets
* Baning of incomming peers ignores the remote port number (only checks IP)
* WebUI: show last block number in the top level menu

1.0.1 - 2014-10-19
* Parallel processing switched back on (was accidentally disabled in "lib/others/sys/const.go")

1.0.0 - 2014-08-07
* Updated script/transaction test cases with the most recent files from bitcoin core
* Mining pool tags are now in miners.json - can be changed without restarting the node
* Allows to edit label of a wallet's address directly from WebUI
* Allows to select a hidden wallet at the Wallet tab of WebUI (so you can edit it)

1.0.0rc8 - 2014-06-19
* Wallet: shows hashed value of stealth prefixes (in decoded tx)
* Client: unspent4 - new format of UTXO database (lower memory and disk usage)
* Lib: add to UTXO records info about it coming from a coinbase
* Lib: bct.WriteVlen trakes 64-bit value now (previously 32)
* Downloader: further optimized, pings mode removed

1.0.0rc7 - 2014-06-11
* Wallet: more reorganizing and cleaning
* Wallet: removed "-hashes" option (added in 0.9.2)
* Reject blocks version < 2 of main chain's height >= 200000
* Check the block height from coinbase to match expected height value (for blocks version >=2)
* Check transactions for consistency and finality in parallel
* PeersDB extrancted from "client/network" to "lib/others/peersdb"
* Downloader: the seed node is optional now
* Client: print the size of blocks which are being orphaned

1.0.0rc6 - 2014-05-28
* Wallet: "-raw" command can now sign also multisig inputs (if they already have the script)
* Stealth addresses: fixed the ephemkey's 03 issue (makes it incompatible with current DW)
* Wallet: lots of reorganizing, cleaing and some basic tests added

1.0.0rc5 - 2014-05-26
* btcversig tool: added Litecoin support (specify LTC address or add "-ltc" switch for testnet)
* lib/btc: BtcAddr.OutScript() handles version 48 (Litecoin's P2KH) & panics if cannot output right script
* WebUI: shows page generation time
* WebUI: fixed non-existing page tails
* Wallet: added litcoin mode ("-ltc" switch)
* New tool: "balio". Like "fetchbal", but also works with Testnet and Litecoin. Uses only "http://blockr.io/"

1.0.0rc4 - 2014-05-22
* secp256k1 uses precomputed constants instead of calculating them during initialization (wallet starts faster)
* Source files and packeges moved around like hell. Don't even ask, but it was a change for good.
* Btc: added API functions for HDWallets (see "wallethd.go")
* Wallet: you can add "seed" param to the config file, as a potential countermeasure against keyboard loggers
* Client: new TextUI commands ("arm", "unarm", "armed") help to secure your stealth addresses' scan-keys
* Client: the balance of all the wallets gets pre-cached while opening UTXO database
* Client: configuring "Memory.NoCacheBefore" can now lower mem usage with no much visible performance drop
* Client: "NoCacheBefore" can have a negative value, that will define an offset from the highest known block
* Client: More help topics in WebUI
* Further refactor of the code

0.9.14 - 2014-05-13 (1.0.0-rc2)
* Qdb: Uses malloc() and free() from libc, to optimize usage of system memory (skips garbage collector)
* Client: improved statistics page of WebUI and renamed from Stats to Counters
* Client: added new command "age" to TextUI

0.9.13 - 2014-05-10 (1.0.0-rc1)
* Huge refactor of the entire repo
* Support for stealth addresses
* Wallet: support for "-p" switch that forces asking for seed password
* Wallet: support for "-f" swicth, to exclude fee from the fist output's value
* Wallet: many other changes

0.9.10 (intermediate checkpoint tag)
* Client: an address listed more than once in a wallet gets removed (was showing wrong balance)
* Wallet: can generate a stealth address. Use "-scankey <key>". Uses the first private key for spend.

0.9.9 - 2014-04-30 *LAST_STABLE*
* Wallet: if you specify "-msg <text>" parameter it adds a null output with the text to the tx
* Client: fixed a crash when loading a transaction with an output that has no standard address
* Client: proper removing (from the memory pool) transactions altered by the malleability
* Client: Relevant records are removed from SpentOutputs when expiring txs from mempool (memleak fix)
* Client: Do not save connected (alive) peer's record into DB more often than once per minute
* goc - a new tool to control the node from a remote console, using a WebUI interface
* peers - a new tool to display content of the peers database
* base58 - a new tool to encode/decode base58 strings
* Added "restore leading zeros" to btc.Decodeb58(), to reflect behaviour from the satoshi's code

0.9.8 - 2014-04-22
* Added locally served "Help" page to WebUI
* Some additional features on WebUI's "Home" page (e.g. network's hasharate)
* The block database uses a different index file ("blockchain.new" instead of "blockchain.idx")
  The client will convert the old index into the new one, during the first start.
  Going back to a previous version (after conversion), rename blockchain_backup.idx to blockchain.idx
  If you don't plan to go back to a previous version anymore, delete blockchain_backup.idx
* Added support for "getheaders" and "notfound" commands
* Some code in the btc lib has been restructured (now ther are functions in place of fields)

0.9.7 - 2014-04-13
* Wallets tab of WebUI has an option to move an empty address to UNUSED wallet
* A user can quickly switch wallet being at any tab of the WebUI, as well as to reload it
* SendTx tab of WebUI refreshed Address Book using Ajax and addrs.xml
* Fixes and additional test cases around parsing of alert messages
* Added unit tests for "sighash.json" from the satoshi's repo and some more unit test rework
* A link to the user manual (served at google sites) in the header of each WebUI page

0.9.6 - 2014-04-02
* Client has a hammering protection (bans peers that keep trying to reconnect)
* Miners tab of WebUI does not show crap anymore is the chain isn't up do date.
* MakeTx tab of WebUI calculates estimated transaction size after signed (assumes compressed keys)
* Downloader can work with testnet and got a fix around an empty peers db after the headers stage
* New function "tools/utils/fetchtx.go", to download raw tx data from other websites
* If neccessary, FetchBal and FetchTx try several websites to fetch a raw transaction data

0.9.5 - 2014-03-24
* "MakeTx" tab of WebUI automatically recalculates the payment values to mBTC (for verification)
* The downloader does not have a default seed node anymore (you need to find one by youself)
* Do not block connections from 129.132.230.70-100 anymore
* Some changes in wallet's decode transaction functionality to better deal with non stardard txs
* "wallet -d <txfile.txt>" ignores spaces, tabs and EOLs in the hexdump of the transaction

0.9.4 - 2014-03-20
* The default "FeePerByte" changed from 10 to 1 (like they have done it in the reference client)
* The "-d" option of the wallet can now proparly decode coinbase transactions
* The client can work with multisig address description JSON files (place them in "wallet/multisig")
* Having the files in "wallet/multisig", MakeTx tab of client's WebUI can now create "multi2sign.txt"
  ... for the wallet, even properly mixing inputs from different addresses and address types.
* For multisig payments, "payment.zip" from the client contains "multi2sign.txt" and "multi_pay_cmd"
* The wallet can now deal with mixed (multisig and regular) inputs

0.9.3 - 2014-03-14
* Fixed a critical bug in parsing OP_CHECKMULTISIG and OP_CHECKMULTISIGVERIFY
* Wallet has a new option "-msign" that signs a multisig transaction with a single key
* Wallet has a new option "-p2sh" to prepare a raw transaction for multisig processsing
* Wallet can print public key of a given bitcoin address ("-pub <addr>")
* Wallet can now properly send money to P2SH-type addresses
* The new tool "mkmulti" that can be used for generating multisig addresses
* Few improvements around handling P2SH-type scripts and addresses

0.9.2 - 2014-03-06
* Order of B_secret and A_public_key arguments swapped for "type2determ" tool
* A new tool "type2next" to calculate a next type-2 deterministic public key/address
* Wallet has a new option "-1" that used along with "-l" does not re-ask for password
* Wallet can print hashes of each transaction's input to be signed ("-raw <txfile> -hashes")
* Wallet can sign a raw hash ("-hash <hash>") with a given key ("-sign <pubadr>")
* A new tool "txaddsig" for inserting signature + public key into a raw transaction
* Show entire content of the current wallet in MakeTx tab, if the book would be empty

0.9.1 - 2014-03-01
* Little faster algos (by peterdettman) for field's sqrt() and inv() (in "btc/newec")
* Fix: wallet is not able to properly "-sign" with imported (un)compressed addresses
* Pre-caching of all the wallets' balances include commented out addresses
* "Discus Fish" added to the mining pools

0.9.0 - 2014-01-23
* The "downloader" app which can download the entire blockchain in less than 2 hours
* Major performance improvement of UTX reindexing (rebuilding) functionality
* Bugfix: the blance cache could cause panic when two outputs were being spent from the same address
* Pre-cache all the addresses from all the wallet files at startup
* Banned IP range 129.132.230.0/24 changed to 129.132.230.70 - 129.132.230.100
* No TexUI mode for apps with no access to stdin (use "-textui=false" switch)

* Added a special wallet "ADRESSES" that contains the address book (for MakeTx tab)
* Support for "virgin" addresses in the wallet files (put space before the address).
  (virgin addresses are hidden the wallet tab as long as their balance is zero)

0.8.6 - 2013-12-30
* Added "Load TX" to the top menu in WebUI
* Allow for hidden wallets (start filename with ".") and a nested sub-wallets (up to 3 levels deep)
* Fix: after changing a label in a wallet file it get changed in the unspent list as well
* Fix: the list of unspent outputs is now being sorted properly (by block height)
* "wallet -d" prints number of (yet) unsigned inputs
* "versigmsg" renamed to "btcversig" and some new features were added
* Expire external IPs after one hour from last seen
* Added new fields "Nonce", "TxCount", and "TxOffset" to "btc.Block" (set in "btc.NewBlock")

0.8.5 - 2013-12-18
* From now on every "payment.zip" contains also the unsigned raw transaction file ("tx2sign.txt")
* Added a cache for address balances to speed up switching between wallets
* Building the wallet for Windows does not require mingw anymore (now it uses msvcrt.dll for _getch)

0.8.4 - 2013-12-14
* Support for JoinCoin sort of transaction in the wallet
* We do not add mined txs to TransactionsRejected map (or at least try to)
* WebUI cosmetic here and there...
* Transaction and EC signing parts moved from the wallet app to the btc package
* Added "-raw <filename>" and "-d <filename>" command to the wallet (to sign, decode transaction file)
* Fixed decoding of P2SH-type addresses in btc.NewAddrFromPkScript()
* Added support for relay=0 received from peers (do not send tx invs to them)

0.8.3 - 2013-11-28
* Support for GOCOIN_WALLET_CONFIG env variable (enforces the wallet's config file)
* Added CFG.PayCommandName so you could e.g. make it .bat or .sh (the default is "pay_cmd.txt")
* The home tab shows time next to each unspent outputs
* Cosmetic here and there...

0.8.2 - 2013-11-10
* "fetchbal" can work via tor now (set env variable TOR=localhost:9150)
* Any own tx can now be sent to only a single random peer (privacy feature)
* You can include another wallet inside a text wallet file (use "@filename")

0.8.1 - 2013-11-06
* "fetchbalance" renamed "fetchbal" and now it works with coinbase txs properly
* New tool fetchtx to downlaod raw tx from blockexplorer.com
* Block subnet 129.132.230.0/24 (fixed for now)
* Allow to setup User-Agent reported by the version messsage (a privacy feature)
* Some minor changes in fetchbalance
* Disconnect & Ban peers that have not sent a single inv to us for 15 min since connecting

0.8.0 - 2013-10-26
* Souce code of the client hugely restructured
* A new tool "fetchbalance" that can fetch the ballance from blockchain.info & blockexplorer.com

0.7.8 - 2013-10-12
* Password chars are hidden when being input (if wallet does not build, delete "wallet/hidepass.go").
* "MakeTx" tab is precise now converting between Satoshi and BTC values

0.7.6 - 2013-09-29
* "MakeTx" tab in WebUI (to pre-make the command for the wallet app)
* Droppig a peer (from TextUI or WebUI) bans its IP by the way
* Added "-useallinputs" switch to the wallet app
* Added CFG.MiningStatHours so minig stats are not fixed to 24 hours anymore

0.7.4 - 2013-09-20
* A new port of sipa's secp256k1 lib, based on the 10x26 filed implemetnation (btc/newec)
* The new btc/newec speedup enabled by default.
* The old native speedup's source code removed.

0.7.3 - 2013-09-19
* A new (native Go) EC_Verify speedup, based on sipa's secp256k1 code (client/speedup/mygonat.go)
* Cosmetic chanegs in WebUI
* A new (DLL based) EC_Verify speedup for Windows (client/speedup/sipadll.go)

0.7.1 - 2013-09-10
* Wallet's random numbers (used for ECDSA_Sign) don't rely on security of "crypt/random" package

0.7.0 - 2013-09-03
* A major rewrite around shared memory access, in the network client
* Added some protection against racing conditions
* Do not switch off GC while verifying a block
* Added UI command "defrag" that purges and recompresses the block database
* Added snappy compression for the block database (its faster than gzip)

0.6.6 - 2013-08-27
* Added support for wallet.cfg to specify some default values
* Wallet's "-t2" and "-t3" command line swiches replaced with "-type=X"
* Labels returned in balance.xml are HTML escaped

0.6.5 - 2013-08-25
* Fixed a critical bug in script parsing (0x00 at top of the stack was not considered as "if true")
* Fetch seed peers in a background and save peers DB to disk before quiting
* Ctrl+C works now also during rescan and allows to continue later from where stopped.

0.6.4 - 2013-08-15
* Support for deterministic wallet Type-3 (keeps other keys safe, if one got compromised)
* The wallet can export private key now, in the satoshi's base58 format (-dump switch)

0.6.3 - 2013-08-09
* Show balance of per address at the Wallets tab
* Added support for WebUI switchable wallets
* Improved script_test.go, so it works directly with satoshi's json files

0.6.0 - 2013-07-27
* Added support for verifying (rejecting) P2SH transactions
* Added handling of OP_1ADD script opcopde and fixed some other opcodes
* UI cmd "unspent" returns outputs sorted by block height

0.5.8 - 2013-07-25
* Added some more satoshi-script-evaluation compatiblity patches (and unit tests)
* By default, don't download same block from more than 3 peers simultaneously (CFG.Net.MaxBlockAtOnce)
* Fixed a critical blockchain parsing issue, with SIGHASH_SINGLE sigs (was rejecting valid blocks)

0.5.5 - 2013-07-20
* The wallet now supports Type-2 deterministic keys (use "-t2" switch)
* Make the node's beeping setup configurable though gocoin.conf
* Allow to decode (display) a transaction's details (only txs that are in memory pool)
* Minor improvements in net module (i.e. shrink send buffer after each write)

0.5.3 - 2013-07-11
* XSS protection on WebUI and IP access control
* Some new network security features
* Like Satoshi client, do not process incoming messages having more than 1MB in send buffer
* Some changes around qdb database (improved syncs for unspent db, added counters)

0.5.2 - 2013-07-07
* WebUI improvements
* Yet more improved "qdb" is now a part of the repo

0.5.0 - 2013-07-04
* Requires new "qdb" ... much imporved statrup times.
* Never keeps unwind records in memory (only on disk)
* Allows to not keep old unspent outputs in mem. Modify "UTXOCacheBlks" in the config to switch it on.

0.4.8 - 2013-07-02
* Added new blocks' timing stats to the WebUI
* New tool "importblocks" for importing blocks from Satoshi's DB
* Improvements in tx memory pool
* Big rework in the network module
* Allow sorting of transaction tables in WebUI

0.4.3 - 2013-06-27
* Some more WebUI templates, and further extensions
* Fixed a bug with checking new block height in block_check.go
* Allows loading and broadcasting of local txs via WebUI
* Allows to download the balance folder via WebUI
* More WebUI templates

0.4.1 - 2013-06-25
* Do not route txs that have any output lower than a fee for 0.5KB
* Added support for a config file
* Fixed a bug introduced in 0.4.0 that was removing own txs from the pool
* Templates for WebUI

0.4.0 - 2013-06-24
* Added tx routing (you can switch it off with "-txr=false")
* Further WebUI extensions
* A bunch of other code changes, that I don't remember now

0.3.5 - 2013-06-23
* Addded WebUI - by default on http://127.0.0.1:8833/
* Improved framework for mining stats
* Changed the way "getblocks" is requested, plus some other hard to describe net related changes

0.3.4 - 2013-06-20
* Arithmetic script opcodes check for the 4 bytes limit at input values
* Better external IP address discovery and droping connections to self
* Added a memory cache for blocks database (in btc/blockdb.go)
* Added sipasec cgo for EC_Verify (over 5 times faster than openssl)

0.2.15 - 2013-06-18
* Support for gzip compressed blocks inside blockchain.dat
* A tool to compress blockchain.dat (tools/compressdb.go)
* Rejects blocks that would cause forks long ago in a past