gbizzotto/ournode

ournode's Issues

Check difficulty changes

Verify changes in difficulty match the consensus algorithm

Add an rpc interface

Let the node manager request data locally like blocks, TXs, UTXOs, mempool...

Keep better list of peers

Discarding unresponsive peers
Prioritize most responsive ones

Organize a log scheme

At least have

• timestamps
• severity (debug/info/warning/error/fatal/config)

Conf/cmd line options

Some restrictions seem arbitrary and could be disabled while still having a compatible full node:

• Enable minimum fee
• Restrict TX's output to standard forms

Reorder chains to prioritize longest chain

In case of fork, make the "most work" chain the root chain.
Reflect changes onto persistent memory.

Calculate the UTXO set

Keep it in persistent memory and index it by TXID.

Check tx input vs output amounts

Verify that total output amounts <= total input amounts

Check coinbase tx reward

Check total fees and reward against halvings

Write blockchain to disk

• Separate folders for mainnet/testnet3/etc
• Keep files below 4GiB
• Keep full blocks, can be serialized network-like
• Index blocks by hashes
• Index blocks by height

Check TX's nLockTime

Check TXs

In blocks and mempool:

• minimum fee
• inputs are unspent

Check TX script

Ok this is a big one, let's break this down into:

• Being able to identify and check a P2PK script
• Being able to identify and check a P2PKH script
• Being able to identify and check a P2PSH script
• Being able to identify and check a P2WPKH script
• Being able to identify and check a P2WSH script
• Being able to check any signature type

Answer getaddr, getheaders, getblocks, getdata

Behave like a decent full node and provide the data.

Support SPV filtering

Answer filterload, filteradd, filterclear, merkleblock messages.

mempool

Keep and index unconfirmed TXs received from peers.

Check block hash agains difficulty

Verify block hash is below difficulty

Enable pruning

• Blocks
• spend TXOs
• UTXO set
• mempool (not keeping one)

Command line option to choose network

Choose config file according to the folder chosen
Select genesis TX accordingly
Choose algorithms specific to the chain (notably difficulty)

Keep blockchain updater from starving

One fiber downloads the list of blocks with getblocks - inv messages.
Sometimes it stops for some reason. Maybe the peer stops responding.
As a consequence, the fibers downloading the missing blocks stop.

Network traffic statistics

Keep and show, per peer and total:

• total bytes sent and rcvd
• current bytes/bits per second