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No need to convert these types.
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* p2p/enr: add entries for for IPv4/IPv6 separation
This adds entry types for "ip6", "udp6", "tcp6" keys. The IP type stays
around because removing it would break a lot of code and force everyone
to care about the distinction.
* p2p/enode: track IPv4 and IPv6 address separately
LocalNode predicts the local node's UDP endpoint and updates the record.
This change makes it predict IPv4 and IPv6 endpoints separately since
they can now be in the record at the same time.
* p2p/enode: implement base64 text format
* all: switch to enode.Parse(...)
This allows passing base64-encoded node records to all the places that
previously accepted enode:// URLs. The URL format is still supported.
* cmd/bootnode, p2p: log node URL instead of ENR
...and return the base64 record in NodeInfo.
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This change implements EIP-868. The UDPv4 transport announces support
for the extension in ping/pong and handles enrRequest messages.
There are two uses of the extension: If a remote node announces support
for EIP-868 in their pong, node revalidation pulls the node's record.
The Resolve method requests the record unconditionally.
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This change restructures the internals of p2p/discover to make room for
the discv5 code which will soon be added to this package.
- packet type names now have a "V4" suffix.
- ListenUDP returns *UDPv4 instead of *Table. This technically breaks
the API but the only caller in go-ethereum is package p2p, which uses
a compatible interface and doesn't need changes.
- The internal transport interface is changed to make Table reusable for v5.
- The 'lookup' code moves from table to transport. This required
updating the lookup unit test to use udpTest instead of a custom transport.
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