wallet-core/node_modules/indent-string/index.js

'use strict';
module.exports = (str, count, opts) => {
	// Support older versions: use the third parameter as options.indent
	// TODO: Remove the workaround in the next major version
	const options = typeof opts === 'object' ? Object.assign({indent: ' '}, opts) : {indent: opts || ' '};
	count = count === undefined ? 1 : count;

	if (typeof str !== 'string') {
		throw new TypeError(`Expected \`input\` to be a \`string\`, got \`${typeof str}\``);
	}

	if (typeof count !== 'number') {
		throw new TypeError(`Expected \`count\` to be a \`number\`, got \`${typeof count}\``);
	}

	if (typeof options.indent !== 'string') {
		throw new TypeError(`Expected \`options.indent\` to be a \`string\`, got \`${typeof options.indent}\``);
	}

	if (count === 0) {
		return str;
	}

	const regex = options.includeEmptyLines ? /^/mg : /^(?!\s*$)/mg;
	return str.replace(regex, options.indent.repeat(count));
}
;