github.com/gcash/bchd

Consensus & Network

• Update mainnet chain params for post-hardfork (ASERT) activation, and add post-fork params for testnet3, regtest, and simnet (#430).
• Add a UTXO-set checkpoint hash and sources to the chain params.
• Fix the DNS seeds list after the hard fork (#428).

RPC & gRPC

• Add an RPCAuthTimeout option to configure the RPC auth timeout (#421).

Performance

• Check for known inventory before relaying a compact block, avoiding redundant relays.

Build & Packaging

• Build with Go 1.15.5 (#423).

Consensus & Network

• Implement the aserti3-2d (ASERT) difficulty adjustment algorithm for the November 2020 BCH hard fork, and wire up its activation (#399, #402).
• Select a new sync peer when the median of sync-peer candidates is ahead of us, improving recovery from stalled syncs (#411).

Mempool & Policy

• Increase the maximum standard transaction size to 100k (#405).
• Remove ScriptVerifyMinimalIf from the standard verification flags to match Bitcoin ABC policy (#413).

RPC & gRPC

• Rebuild all protobuf bindings and document little-endian field formats in the gRPC comments (#394).
• Add a Java protobuf package (com.bchd.rpc) for the bchrpc API (#396).

Build & Packaging

• Build with Go 1.15.3; drop darwin/386 support (removed in Go 1.15) (#419).

Mempool & Policy

• Default to disabling relay of free (very low fee) transactions (#383).

RPC & gRPC

• Support cookie-based RPC authorization (#393).
• Accept either int or bool for the verbosity argument in getrawtransaction and searchrawtransactions (#391).
• Add a getbalances RPC client command and backport getblock verbosity fixes (#388, #389).
• Return the version in getnetworkinfo in the same format as ABC/BCHN.
• Remove custom HTTP handling so RPC connections support keep-alives (#384).

Security

• Avoid a panic in bchec fieldVal.SetByteSlice for oversized inputs.
• Fix a deadlock in dynamicbanscore.

Bug Fixes

• Prevent a peer's last block height from going backwards (#392).

Other

• Document that CIFS users must turn off async preemption (#390).

RPC & gRPC

• Fix an off-by-one error in transaction confirmation counts in the gRPC API (#376).

Wallet & Indexing

• Raise MaxCFilterDataSize to 2 MiB so larger compact filters can be served.

Consensus & Network

• Fix a bug calculating sigcheck density (#374).

Consensus & Network

• First-pass cleanup of pre-fork hard-fork code paths (#373).
• Add a new fastsync checkpoint and update the testnet checkpoint hash.

RPC & gRPC

• Remove sigops references from the RPC server results.

Consensus & Network

• Fix bugs in OP_REVERSEBYTES and set the Phonon activation time in tests (#371).

Consensus & Network

• Activate the May 2020 (Phonon) hard fork, with sigcheck accounting replacing sigop counting (#348, #360, #366).
• Add the OP_REVERSEBYTES script opcode (#348).
• Do not disconnect peers that send unknown commands; only warn in the logs (#369).
• Remove dead/invalid DNS seeds and add back the bitcoinforks seeders (#337, #359, #364).

Mining

• Update the mining package for the May 2020 hard fork (#348, #362).
• Add a config option to set CoinbaseFlags in the block-template coinbase input (#340).

RPC & gRPC

• Improve memory usage of the GetAddressUnspentOutputs RPC call (#332, #333).

Security

• Add a first-pass MuSig implementation with session commitments (#334, #347).

Build & Packaging

• Build with Go 1.14.2 and update all dependencies, including a new bchutil (#344, #365, #368).

Consensus & Network

• Make verack part of the version handshake; add peers on OnVerAck rather than OnVersion to harden connection negotiation (#319, #320).
• Add configurable user-agent filtering for peer connections (#318).

RPC & gRPC

• Update ParsePkScript to support multiple networks (#317).
• Guard against a nil request in SubscribeTransactionStream to prevent a crash (#324).
• Warn instead of exiting when binding the RPC/gRPC server to a non-localhost address (#314).

Performance

• Skip transaction rescan when the client has subscribed to no addresses or UTXOs (#321).

Build & Packaging

• Add a sample bchd systemd service unit.

Consensus & Network

• Fix a consensus bug in OP_CHECKMULTISIG where the dummy stack element was not copied correctly (#311).
• Update checkpoints with the new (Graviton) hard-fork parameters (#310).
• Add the testnet-seed.bchd.cash DNS seed (#309).

Performance

• Improve initial block download and syncing performance (#307).
• Allow wire.MsgTx objects to be garbage-collected before the UTXO cache is flushed, reducing memory use (#292).

Security

• Copy pkScript in addTxOut and disconnectTransactions to prevent UTXO data corruption (#293).
• Add a notification lock to guard against a double unlock (#308).

Build & Packaging

• Switch the Docker image to a multi-stage build (#301).

Consensus & Network

• Add the November 2019 (Graviton) hard-fork rules (#284).

RPC & gRPC

• Match bitcoind's RPC error codes when rejecting transactions (#278).
• Fix a gRPC bug returning unspent outputs and refactor GetUnspentOutput to match the JSON-RPC code (#281, #282).
• Check spent status in the mempool when returning unspent outputs (#286).

Wallet & Indexing

• Migrate the committed-filter (cfindex) index to version 2; disable cfindex in fastsync mode and skip migration when the chain is pruned (#288).

RPC & gRPC

• Add the GetMempool gRPC method to retrieve the full mempool (#270).
• Add the GetUnspentOutput gRPC method and a mempool flag on GetAddressUnspentOutputs to include unconfirmed UTXOs (#267).
• Add streaming raw (serialized) transaction and block subscriptions to gRPC (#273, #274).
• Add median time to gRPC BlockInfo and fix median time in GetBlockchainInfo (#271).
• Add batched JSON-RPC 2.0 request support, and accept boolean verbosity in getblock (ElectrumX compatibility).
• Regenerate gRPC bindings, adding a Python library and updated JS (#275).

Build & Packaging

• Convert the project from dep to Go modules (#266).

Bug Fixes

• Ensure downstream peers receive new blocks accepted via reorg of previously-orphaned blocks (#265).
• Only scan .fdb files when loading the block database, ignoring stray files (#258).

Consensus & Network

• Fix OP_NUM2BIN to pop a byte array off the stack (matching Bitcoin ABC) rather than a scriptnum (#253).

Consensus & Network

• Fix a bug in Schnorr signature validation by normalizing field values before comparison (#250).

Mempool & Policy

• Increase DefaultBlockPrioritySize to 1,600,000 bytes (#238).

Mining

• Increase the default mining block size (blockmaxsize) to ~32 MB (#240).
• Fix block-template generation so coinbase padding no longer drops the coinbase below the 100-byte minimum (#238).

RPC & gRPC

• Implement the getnetworkinfo JSON-RPC call (#241).
• Fix CORS preflight (OPTIONS) handling for grpc-web (#243).
• Generate grpc-web JavaScript client libraries (#248).

Performance

• Set the fast-sync worker count based on runtime.NumCPU() (#251).

Consensus & Network

• Activate the GreatWall (May 15, 2019) hard fork at block height 582679, enforcing the Schnorr and SegWit-recovery script flags, and add a checkpoint at the fork block (#230).
• Switch transaction-signing functions to Schnorr and add ScriptVerifySchnorr to the standard verify flags (#228).

RPC & gRPC

• Fix GetAddressUnspentOutputs to return all UTXOs for an address instead of only the last 100 (#225).

Build & Packaging

• Expose the database cache size and flush interval as config options (#232).

Bug Fixes

• Override the UTXO cache entry (using a clone) in the reorg case so spent/unspent transitions are applied correctly (#234).

RPC & gRPC

• Add a new bchrpc gRPC API server with full node and wallet query support, gRPC-Web via protocol multiplexing for browser clients, CORS, and server reflection (#217, #222).
• Add spent-output (stxo) metadata to transaction input responses (#217).
• Add API, client-usage, and wallet-operation documentation (#217).

Bug Fixes

• Fix GetMerkleProof returning incorrect proofs (#217).
• Fix GetAddressTransactions and fetch address transactions in reverse order (#217).
• Fix a bug subscribing to blocks (#217).

Consensus & Network

• Update segwit-recovery handling to the latest May 2019 hard-fork spec (#216).
• Fix a bug in OP_NUM2BIN (#215).

Mempool & Policy

• Add the invalidateblock RPC and set flags on ancestors of invalidated blocks (#214, #218).

RPC & gRPC

• Fix getinfo to return the correct protocol version (#212).

Wallet & Indexing

• cfindex no longer requires transaction inputs to build filters (#213).

Consensus & Network

• Fix a bug in OP_CAT and allow multiple data pushes in OP_RETURN (#210, #211).
• Add ScriptVerifyCheckDataSig to the standard verify flags (#206).

Performance

• Add compact block (BIP152) relay and processing support, including sendcmpct/getblocktxns handling and direct block relay to requesting peers (#197).
• Use the hashcache for script validation where possible (#208).

Wallet & Indexing

• Update bchutil to the new compact-filter format and add indexer database migrations (#204, #209).

Consensus & Network

• Implement the May 2019 BCH hard fork (Great Wall): activation, tests, and the ScriptVerifyAllowSegwitRecovery flag (#192).
• Add Schnorr signature support in the bchec package and wire OP_CHECKSIG/OP_CHECKDATASIG to accept Schnorr signatures (#180).
• Fix MaxBlockSigOps enforcement so the sigop limit scales per-MB of block size with accurate byte counting (#193).
• Fix bugs in UTXO rollback and InitConsistentState so the chain rolls back correctly (#174, #181).

Wallet & Indexing

• Add GetCFMempool for compact block filters over the mempool (#190, #195).

Performance

• Improve reliability of the FastSync UTXO-set download, add SOCKS5 proxy support, and show download progress (#188, #189, #198).