/**
 * Shared SPL Token Transfer verification utility for Solana.
 *
 * Used by bridge-server.ts when the target chain is Solana.
 * Verifies that a transaction contains an SPL token transfer
 * to the expected recipient for at least the expected amount.
 */
interface VerifySplTransferOptions {
    /** Transaction signature (base58) */
    txSignature: string;
    /** Solana RPC URL */
    rpcUrl: string;
    /** SPL token mint address */
    tokenMint: string;
    /** Expected recipient wallet address */
    recipient: string;
    /** Minimum expected amount in base units */
    expectedAmount: bigint;
}
/**
 * Verify that a Solana transaction contains a valid SPL token transfer
 * to the expected recipient for at least the expected amount.
 *
 * Uses raw JSON-RPC to avoid hard dependency on @solana/web3.js at runtime.
 *
 * @throws if the transaction is missing, failed, or doesn't match.
 */
declare function verifySplTransfer(opts: VerifySplTransferOptions): Promise<void>;

export { type VerifySplTransferOptions, verifySplTransfer };