@lelantos-org/sdk / x402 / deriveEphemeralKey
Function: deriveEphemeralKey()
ts
function deriveEphemeralKey(nsk, index): `0x${string}`;Defined in: @lelantos-org/sdk/dist/x402/ephemeral.d.ts:23
keccak256(domainTag ‖ nsk_le ‖ u32le(index)) reduced into [1, n-1].
Deterministic: the same wallet and index always yield the same key, so a top-up sent to index is still spendable after a restart.
Parameters
| Parameter | Type | Description |
|---|---|---|
nsk | bigint | Nullifier spending key — wallet.keys.nsk. |
index | number | Payer slot. Distinct indices are unlinkable to each other. |
Returns
`0x${string}`