Signing key

A signing key is the private key a wallet uses to cryptographically sign transactions, proving authorization to spend its funds.

The signing key is the secret half of a wallet's key pair. Signing a transaction with it produces a signature the network verifies against the wallet's public address, and control of the key is control of the funds — which is why custody models turn on who holds it. Our tx primitives are non-custodial: we build and simulate the transaction and broadcast the signed one, but signing happens on the wallet's side and we never see or store the signing key.