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feat: add extended-key slot-2 signer for safes - #9984
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For safes, Add signEd25519Extended to sign directly from a soft-derived BIP32-Ed25519 extended key (scalar kL + nonce prefix kR), which has no seed and so cannot use seed-based signers. Add an optional externalBackupSignature to XLM/HBAR/ALGO recover() so the backup child's signature can be injected instead of signed from a seed. Ticket: WCN-2895
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Claude finished @davidkaplanbitgo's task —— View job I'll analyze this and get back to you. |
davidkaplanbitgo
approved these changes
Oct 16, 2026
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What
For safes, add signEd25519Extended to sign directly from a soft-derived BIP32-Ed25519 extended key (scalar kL + nonce prefix kR), which has no seed and so cannot use seed-based signers.
Add an optional externalBackupSignature to XLM/HBAR/ALGO recover() so the backup child's signature can be injected instead of signed from a seed.
TICKET: WCN-2895