/**
 * ULID minting: a 26-character, lexicographically sortable id — 48 bits of millisecond timestamp
 * followed by 80 bits of randomness, rendered in Crockford's base32. Sortable ids are what make an
 * `epoch` comparable ("which boot came first") without carrying a second field, and 80 random bits
 * make a collision between two boots of the same millisecond unreachable.
 */
/** Mint a ULID. `now` is injectable so a caller can pin the time half in a test. */
export declare function newUlid(now?: number): string;
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