Preliminary fx(params) type defs (based on: https://github.com/fxhash/fxlens/blob/master/src/components/FxParams/types.ts)

fxparams.ts

export type FxParamType =
	| "number"
	| "bigint"
	| "boolean"
	| "color"
	| "string"
	| "select";

interface FxParamBigintOpts {
	min?: number | bigint;
	max?: number | bigint;
}

interface FxParamNumberOpts {
	min?: number;
	max?: number;
	step?: number;
}

interface FxParamStringOpts {
	minLength?: number;
	maxLength?: number;
}

interface FxParamSelectOpts {
	options: string[];
}

export interface FxParamOptionsMap {
	number: FxParamNumberOpts;
	bigint: FxParamBigintOpts;
	boolean: never;
	color: never;
	string: FxParamStringOpts;
	select: FxParamSelectOpts;
}

export interface FxParamTypeMap {
	number: number;
	bigint: bigint;
	boolean: boolean;
	color: string;
	string: string;
	select: string;
}

export interface FxParamDefinition<Type extends FxParamType> {
	id: string;
	name?: string;
	type: Type;
	default?: FxParamTypeMap[Type];
	options: FxParamOptionsMap[Type];
	version?: string;
}