/**
 * Shared validation constants for Bitcoin-related input sanitization.
 *
 * These are used across mempool API clients, broadcast services, and
 * transaction construction to enforce consistent format checks.
 */
/** Non-empty string of hexadecimal characters (case-insensitive). */
export declare const HEX_RE: RegExp;
/** Bitcoin txid: exactly 64 hex characters (32 bytes). */
export declare const TXID_RE: RegExp;
/**
 * Bitcoin address format gate: 25–90 alphanumeric characters.
 * Covers legacy (P2PKH/P2SH), bech32 (P2WPKH/P2WSH), bech32m (P2TR),
 * and regtest addresses (bcrt1... which are 62–64 chars for 32-byte witness programs).
 * Upper bound of 90 provides headroom for future address formats.
 * This is a format gate to prevent path-traversal — not full address validation.
 */
export declare const BITCOIN_ADDRESS_RE: RegExp;
/**
 * Known Bitcoin scriptPubKey prefixes:
 * - P2PKH:  76a914...88ac (25 bytes)
 * - P2SH:   a914...87    (23 bytes)
 * - P2WPKH: 0014...      (22 bytes)
 * - P2WSH:  0020...      (34 bytes)
 * - P2TR:   5120...      (34 bytes)
 */
export declare const KNOWN_SCRIPT_PREFIXES: readonly ["76a914", "a914", "0014", "0020", "5120"];
/**
 * Upper bound on the implied miner fee (0.01 BTC = 1,000,000 sats).
 * Catches inflated input values from a compromised mempool API — if inputs are
 * grossly overstated the implied fee becomes unreasonably large. The April 2024
 * Runes spike saw ~450 sat/vB; at 500 vB that's ~225k sats, well under this cap.
 */
export declare const MAX_REASONABLE_FEE_SATS = 1000000n;
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