export declare function removePrefix(s: string, prefix: string): string;
export declare function removeSuffix(s: string, suffix: string): string;
export declare function ensure0x(s: string): `0x${string}`;
export declare function remove0x(s: string): string;
export declare function ensurePrefix(s: string, prefix: string): string;
export declare function ensureSuffix(s: string, suffix: string): string;
export declare function assertIsString(value: unknown, valueName?: string): asserts value is string;
export declare function assertIs0xString(value: unknown, valueName?: string): asserts value is `0x${string}`;
export declare function assertIsStringArray(value: unknown, valueName?: string): asserts value is string[];
export declare function assertIsStringProperty<K extends string>(value: unknown, propertyNames: K[], typeName?: string): asserts value is {
    [P in K]: string;
};
export declare function assertIsStringArrayProperty<K extends string>(value: unknown, propertyNames: K[], typeName?: string): asserts value is {
    [P in K]: string[];
};
export declare function toLowerCaseSet(array: string[]): Set<string>;
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