import type { Connection, Transaction, VersionedTransaction } from '@solana/web3.js';
/**
 * DS3-0414: does the transaction already carry a REAL signer signature? A Solana
 * signature is computed over the compiled message, which INCLUDES recentBlockhash, so
 * the blockhash must not be rewritten once any signer (sponsor / multisig / co-signer)
 * has signed - a rewrite silently invalidates their signature. Legacy signatures are
 * `{ signature: Buffer | null }` entries; versioned signatures are 64-byte arrays that
 * stay all-zero placeholders until a signer fills them. Mirrors turnkey-signer-bridge.ts.
 */
export declare function transactionHasSignature(transaction: Transaction | VersionedTransaction): boolean;
/**
 * Extracts a human-readable error message from Solana transaction logs.
 */
export declare function extractTransactionError(err: any, logMessages?: string[] | null): string;
/**
 * Polls getSignatureStatuses until the transaction is confirmed, then checks for errors.
 * Throws if the transaction failed on-chain. Returns parsed transaction info on success.
 */
export declare function confirmAndCheckTransaction(connection: Connection, signature: string): Promise<any>;