net: I2P SAM v3 (--i2p-sam, --only-net=i2p) - #647
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Display is Core-shaped {52}.b32.i2p:port. SOCKS still refuses I2P
until SAM exists; Direct onion path is unchanged.
Co-authored-by: Cursor <cursoragent@cursor.com>
HELLO + SESSION CREATE once per process; each STREAM CONNECT is a new SAM socket with the session id. Bad HELLO is an error. No live i2pd. Co-authored-by: Cursor <cursoragent@cursor.com>
learn_addrv2 already mapped AddrV2::I2p. Persist the .b32.i2p token so a restart still has the destination when SAM is configured later. Co-authored-by: Cursor <cursoragent@cursor.com>
Omitted SAM ADDR is 127.0.0.1:7656. only-net=i2p without --i2p-sam is a start error. Start opens one SAM session; Direct still refuses I2P dial. Co-authored-by: Cursor <cursoragent@cursor.com>
Persist {datadir}/i2p/p2p.priv from SESSION CREATE DESTINATION. --listen=0
is a Config error: overlay incoming still needs a loopback P2P listener.
Co-authored-by: Cursor <cursoragent@cursor.com>
NixOS i2p.sam / i2p.acceptIncoming are first-class. Eval pins argv. Runtime dummy i2pd.service only for After/Wants; CI does not start i2pd. Co-authored-by: Cursor <cursoragent@cursor.com>
Co-authored-by: Cursor <cursoragent@cursor.com>
Co-authored-by: Cursor <cursoragent@cursor.com>
OnceLock kept a dead session id forever. Store DESTINATION, keep the control socket on reconnect, and retry STREAM CONNECT once on INVALID_ID. Co-authored-by: Cursor <cursoragent@cursor.com>
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reardencode
added this pull request to stack #669
September 21, 2026 03:40
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Summary
Plan 04 (
docs/personal-node-plans/04-i2p.md). Stacked on #646 (net/tor-control-hs).NetAddr::I2pround-trips BIP155AddrV2::I2pas{52}.b32.i2p:port; AddrMan / peers v2 keep I2P rows.HELLO/SESSION CREATE/STREAM CONNECTagainst a fake router (no live i2pd). Direct still refuses I2P dials.--i2p-sam [HOST:PORT](omit ADDR →127.0.0.1:7656).--only-net=i2pwithout SAM is a Config error.--i2p-accept-incomingpersists{datadir}/i2p/p2p.privandSTREAM FORWARDs to the P2P bind.--listen=0is a Config error naming--listen.i2p.sam,i2p.acceptIncoming;After/Wantsi2pd.servicewhen SAM is set. Runtime dummy unit only — CI does not start i2pd.IBD
spawn_peer/follow_dial_targetsremainSocketAddr; onion/I2P--connectparse and filter but do not yet drive IBD dials (same leftover as 02).Test plan
cargo test -p rbitcoin-net --lib i2p_cargo test -p rbitcoin-node --lib i2p_nix build .#checks.x86_64-linux.nixos-module-eval --no-linkcargo clippy --workspace --all-targets -- -D warningsnixos-module-runtimeDo not merge unless asked.
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