1cb3b6aee4
This change addresses an issue in snap sync, specifically when the entire sync process can be halted due to an encountered empty storage range.
Currently, on the snap sync client side, the response to an empty (partial) storage range is discarded as a non-delivery. However, this response can be a valid response, when the particular range requested does not contain any slots.
For instance, consider a large contract where the entire key space is divided into 16 chunks, and there are no available slots in the last chunk [0xf] -> [end]. When the node receives a request for this particular range, the response includes:
The proof with origin [0xf]
A nil storage slot set
If we simply discard this response, the finalization of the last range will be skipped, halting the entire sync process indefinitely. The test case TestSyncWithUnevenStorage can reproduce the scenario described above.
In addition, this change also defines the common variables MaxAddress and MaxHash.
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| .. | ||
| internal | ||
| crawl.go | ||
| discv4cmd.go | ||
| discv5cmd.go | ||
| dns_cloudflare.go | ||
| dns_route53_test.go | ||
| dns_route53.go | ||
| dnscmd.go | ||
| enrcmd.go | ||
| keycmd.go | ||
| main.go | ||
| nodeset.go | ||
| nodesetcmd.go | ||
| README.md | ||
| rlpxcmd.go | ||
| runtest.go | ||
The devp2p command
The devp2p command line tool is a utility for low-level peer-to-peer debugging and protocol development purposes. It can do many things.
ENR Decoding
Use devp2p enrdump <base64> to verify and display an Ethereum Node Record.
Node Key Management
The devp2p key ... command family deals with node key files.
Run devp2p key generate mynode.key to create a new node key in the mynode.key file.
Run devp2p key to-enode mynode.key -ip 127.0.0.1 -tcp 30303 to create an enode:// URL
corresponding to the given node key and address information.
Maintaining DNS Discovery Node Lists
The devp2p command can create and publish DNS discovery node lists.
Run devp2p dns sign <directory> to update the signature of a DNS discovery tree.
Run devp2p dns sync <enrtree-URL> to download a complete DNS discovery tree.
Run devp2p dns to-cloudflare <directory> to publish a tree to CloudFlare DNS.
Run devp2p dns to-route53 <directory> to publish a tree to Amazon Route53.
You can find more information about these commands in the DNS Discovery Setup Guide.
Node Set Utilities
There are several commands for working with JSON node set files. These files are generated by the discovery crawlers and DNS client commands. Node sets also used as the input of the DNS deployer commands.
Run devp2p nodeset info <nodes.json> to display statistics of a node set.
Run devp2p nodeset filter <nodes.json> <filter flags...> to write a new, filtered node
set to standard output. The following filters are supported:
-limit <N>limits the output set to N entries, taking the top N nodes by score-ip <CIDR>filters nodes by IP subnet-min-age <duration>filters nodes by 'first seen' time-eth-network <mainnet/goerli/sepolia/holesky>filters nodes by "eth" ENR entry-les-serverfilters nodes by LES server support-snapfilters nodes by snap protocol support
For example, given a node set in nodes.json, you could create a filtered set containing
up to 20 eth mainnet nodes which also support snap sync using this command:
devp2p nodeset filter nodes.json -eth-network mainnet -snap -limit 20
Discovery v4 Utilities
The devp2p discv4 ... command family deals with the Node Discovery v4
protocol.
Run devp2p discv4 ping <enode/ENR> to ping a node.
Run devp2p discv4 resolve <enode/ENR> to find the most recent node record of a node in
the DHT.
Run devp2p discv4 crawl <nodes.json path> to create or update a JSON node set.
Discovery v5 Utilities
The devp2p discv5 ... command family deals with the Node Discovery v5
protocol. This protocol is currently under active development.
Run devp2p discv5 ping <ENR> to ping a node.
Run devp2p discv5 resolve <ENR> to find the most recent node record of a node in
the discv5 DHT.
Run devp2p discv5 listen to run a Discovery v5 node.
Run devp2p discv5 crawl <nodes.json path> to create or update a JSON node set containing
discv5 nodes.
Discovery Test Suites
The devp2p command also contains interactive test suites for Discovery v4 and Discovery v5.
To run these tests against your implementation, you need to set up a networking environment where two separate UDP listening addresses are available on the same machine. The two listening addresses must also be routed such that they are able to reach the node you want to test.
For example, if you want to run the test on your local host, and the node under test is also on the local host, you need to assign two IP addresses (or a larger range) to your loopback interface. On macOS, this can be done by executing the following command:
sudo ifconfig lo0 add 127.0.0.2
You can now run either test suite as follows: Start the node under test first, ensuring
that it won't talk to the Internet (i.e. disable bootstrapping). An easy way to prevent
unintended connections to the global DHT is listening on 127.0.0.1.
Now get the ENR of your node and store it in the NODE environment variable.
Start the test by running devp2p discv5 test -listen1 127.0.0.1 -listen2 127.0.0.2 $NODE.
Eth Protocol Test Suite
The Eth Protocol test suite is a conformance test suite for the eth protocol.
To run the eth protocol test suite against your implementation, the node needs to be initialized as such:
- initialize the geth node with the
genesis.jsonfile contained in thetestdatadirectory - import the
halfchain.rlpfile in thetestdatadirectory - run geth with the following flags:
geth --datadir <datadir> --nodiscover --nat=none --networkid 19763 --verbosity 5
Then, run the following command, replacing <enode> with the enode of the geth node:
devp2p rlpx eth-test <enode> cmd/devp2p/internal/ethtest/testdata/chain.rlp cmd/devp2p/internal/ethtest/testdata/genesis.json
Repeat the above process (re-initialising the node) in order to run the Eth Protocol test suite again.
Eth66 Test Suite
The Eth66 test suite is also a conformance test suite for the eth 66 protocol version specifically.
To run the eth66 protocol test suite, initialize a geth node as described above and run the following command,
replacing <enode> with the enode of the geth node:
devp2p rlpx eth66-test <enode> cmd/devp2p/internal/ethtest/testdata/chain.rlp cmd/devp2p/internal/ethtest/testdata/genesis.json