import { WalletClient } from "viem";
import { ChainConfig } from "../../chains/types/chainConfig";
export declare function approveToken(params: {
    walletClient: WalletClient;
    chain: ChainConfig;
    spenderAddress: `0x${string}`;
    tokenAddress: `0x${string}`;
    amountInBaseUnit: number;
}): Promise<{
    txHash: `0x${string}`;
}>;
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