/**
 * fourMM configuration management.
 *
 * Stored at ~/.fourmm/config.json. Supports env var overrides for RPC and
 * sensitive values (so users don't have to write secrets to disk).
 *
 * Precedence: env var > config file > default.
 *
 * Paths are exposed as functions (not constants) so that tests can redirect
 * HOME via `process.env.HOME = tmpDir` before each test — `os.homedir()`
 * re-reads the HOME env var on each call, so lazy functions see the change.
 */
export type Network = 'bsc' | 'bsc-testnet';
export type CliConfig = {
    /** BSC RPC endpoint URL */
    rpcUrl: string;
    /** Fallback RPC endpoints (tried on primary failure) */
    fallbackRpcUrls: string[];
    /** Network selection */
    network: Network;
    /** Default slippage in basis points (100 = 1%) */
    defaultSlippageBps: number;
    /** Default gas price multiplier applied to RPC estimate (1.0 = no multiplier) */
    gasPriceMultiplier: number;
    /** Default priority fee in gwei */
    defaultPriorityFeeGwei: number;
    /** Output format default */
    outputFormat: 'toon' | 'json' | 'yaml' | 'md' | 'jsonl';
    /** BSCScan API key (optional, for verification workflows) */
    bscscanApiKey: string;
    /** GeckoTerminal base URL (override for rate limit bypass) */
    geckoTerminalUrl: string;
    /** Four.meme REST API base URL (used for token variant identification) */
    fourmemeApiUrl: string;
};
/** Root directory for fourMM state */
export declare function fourmDir(): string;
/** Config file location */
export declare function configFile(): string;
/** Encrypted wallet groups store directory */
export declare function walletsDir(): string;
/** DataStore root (token info, holdings, balances, transactions) */
export declare function dataDir(): string;
/** Logs directory */
export declare function logsDir(): string;
/** Ensure ~/.fourmm and subdirs exist with tight permissions */
export declare function ensureFourmmDirs(): void;
/** Load config from ~/.fourmm/config.json (or defaults if absent) */
export declare function loadConfig(): CliConfig;
/** Save config to disk */
export declare function saveConfig(config: CliConfig): void;
/** Initialize config (write defaults + any overrides) */
export declare function initConfig(overrides?: Partial<CliConfig>): CliConfig;
/** Get a single config value by key */
export declare function getConfigValue(key: string): unknown;
/** Set a single config value with type coercion */
export declare function setConfigValue(key: string, rawValue: string): void;
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