multiaddr implementation in Python
from multiaddr import Multiaddr
# construct from a string
m1 = Multiaddr("/ip4/127.0.0.1/udp/1234")
# construct from bytes
#m2 = Multiaddr(bytes_addr=m1.to_bytes()) # deprecated
m2 = Multiaddr(m1.to_bytes())
assert str(m1) == "/ip4/127.0.0.1/udp/1234"
assert str(m1) == str(m2)
assert m1.to_bytes() == m2.to_bytes()
assert m1 == m2
assert m2 == m1
assert not (m1 != m2)
assert not (m2 != m1)from multiaddr import Multiaddr
m1 = Multiaddr("/ip4/127.0.0.1/udp/1234")
# get the multiaddr protocol description objects
m1.protocols()
# [Protocol(code=4, name='ip4', size=32), Protocol(code=17, name='udp', size=16)]from multiaddr import Multiaddr
m1 = Multiaddr("/ip4/127.0.0.1/udp/1234")
m1.encapsulate(Multiaddr("/sctp/5678"))
# <Multiaddr /ip4/127.0.0.1/udp/1234/sctp/5678>
m1.decapsulate(Multiaddr("/udp"))
# <Multiaddr /ip4/127.0.0.1>Multiaddr allows expressing tunnels very nicely.
printer = Multiaddr("/ip4/192.168.0.13/tcp/80")
proxy = Multiaddr("/ip4/10.20.30.40/tcp/443")
printerOverProxy = proxy.encapsulate(printer)
print(printerOverProxy)
# /ip4/10.20.30.40/tcp/443/ip4/192.168.0.13/tcp/80
proxyAgain = printerOverProxy.decapsulate(printer)
print(proxyAgain)
# /ip4/10.20.30.40/tcp/443Multiaddr supports DNS-based address resolution using the DNSADDR protocol.
from multiaddr import Multiaddr
# Create a DNSADDR multiaddr
ma = Multiaddr("/dnsaddr/example.com")
# Resolve to actual IP addresses
resolved = await ma.resolve()
print(resolved)
# [Multiaddr("/ip4/93.184.216.34"), Multiaddr("/ip6/2606:2800:220:1:248:1893:25c8:1946")]
# DNSADDR with peer ID
ma_with_peer = Multiaddr("/dnsaddr/example.com/p2p/QmYyQSo1c1Ym7orWxLYvCrM2EmxFTANf8wXmmE7wjh53Qk")
resolved_with_peer = await ma_with_peer.resolve()
print(resolved_with_peer)
# [Multiaddr("/ip4/93.184.216.34/p2p/QmYyQSo1c1Ym7orWxLYvCrM2EmxFTANf8wXmmE7wjh53Qk")]
# Using the DNS resolver directly
from multiaddr.resolvers import DNSResolver
resolver = DNSResolver()
resolved = await resolver.resolve(ma)
print(resolved)
# [Multiaddr("/ip4/93.184.216.34"), Multiaddr("/ip6/2606:2800:220:1:248:1893:25c8:1946")]Original author: @sbuss.
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