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wesh/v0 package

Overview

Package wesh is an on-chain directory and device sigchain for Wesh protocol (weshnet / Berty) identities.

It exists to give weshnet the three things a peer-to-peer network cannot give itself, and which a chain is uniquely good at:

  1. Resolution. A Berty identity travels out of band as a QR code or a https://berty.tech/id# link, and there is no way to look one up. Here a name resolves to a contact, and Render emits the real, scannable link.
  2. Rotation with a paper trail. Resetting the public rendezvous seed silently kills every link ever shared; there is no revocation channel. Here every rotation is a numbered, timestamped, signed entry, and the superseded seeds stay visible, so a stale link resolves to a redirect instead of to nothing.
  3. Device revocation. The Wesh protocol documentation states plainly that a device, once linked to an account, can never be revoked: the account metadata log is append-only and no authority can void an entry. This realm hosts the log that was missing: a hash-chained, account-signed roster whose every entry the chain verifies with ed25519 before accepting it.

What this realm does not do, and will not

It never stores a secret. Group secrets, device chain keys, message keys and ciphertexts stay off chain, permanently. The library this realm is built on, p/moul/x/wesh(/p/moul/x/wesh/v0), has no type that can hold one.

It also does not pretend to enforce revocation inside weshnet. A revoked device's ratchets are already distributed and forward secrecy is a local property; no chain can reach into a group and forget them. What revocation buys here is that it becomes public, ordered, and attributable to the account key, which is strictly more than weshnet has today.

Publishing is a deliberate act

A published rendezvous seed lets anyone derive the account's rotating rendezvous point and watch the DHT for it. That is the same exposure as printing your Berty QR code on a billboard, and it is the right trade only for an identity that wants to be found: a support line, a shop, a public channel.

RegisterCommitted is the alternative. It publishes H(seed ‖ salt) instead, so the chain attests that a seed handed over out of band really belongs to the named account, without broadcasting where that account listens.

Authentication

Every state-changing call carries an ed25519 signature made with the Wesh account private key over a canonical statement that names this chain, the caller's gno address, and a monotonic revision or sequence number. Without it, anyone could publish anyone else's account key next to a seed of their choosing and harvest the contact requests that followed.

Function

AppendDevice

func AppendDevice(cur realm, prevHex, op, devicePKHex, sigHex string)

AppendDevice adds one entry to the caller's device sigchain.

prevHex must be the digest of the current head (all zeros for the first entry), and the signature must cover the whole statement including the sequence number and that digest. Chaining every entry to its predecessor is what stops the log being reordered or having an entry quietly dropped: any gap changes every digest after it.

op is "add" or "revoke". Adding a device that is already active, or revoking one that is not, is refused: an append-only log is only useful if its entries are meaningful.

Params

Command

# WARNING: This command is running in an INSECURE mode.
# It is strongly recommended to use a hardware device for signing
# and avoid trusting any computer connected to the internet,
# as your private keys could be exposed.

gnokey maketx call -pkgpath "gno.land/r/moul/x/wesh/v0" -func "AppendDevice" -args $'' -args $'' -args $'' -args $'' -gas-fee 1000000ugnot -gas-wanted 1_000_000_000 -send "" -chainid "gnoland-1" -remote "https://rpc.gno.land" ADDRESSgnokey query -remote "https://rpc.gno.land" auth/accounts/ADDRESS
gnokey maketx call -pkgpath "gno.land/r/moul/x/wesh/v0" -func "AppendDevice" -args $'' -args $'' -args $'' -args $'' -gas-fee 1000000ugnot -gas-wanted 1_000_000_000 -send "" -broadcast=false ADDRESS > call.tx
gnokey sign -tx-path call.tx -chainid "gnoland-1" -account-number ACCOUNTNUMBER -account-sequence SEQUENCENUMBER ADDRESS
gnokey broadcast -remote "https://rpc.gno.land" call.tx