Method encodeFilterTopics

lib.commonjs/abi/interface.js:865–923

(fragment, values)

    */
    // Create the filter for the event with search criteria (e.g. for eth_filterLog)
    encodeFilterTopics(fragment, values) {
        if (typeof (fragment) === "string") {
            const f = this.getEvent(fragment);
            (0, index_js_3.assertArgument)(f, "unknown event", "eventFragment", fragment);
            fragment = f;
        }
        (0, index_js_3.assert)(values.length <= fragment.inputs.length, `too many arguments for ${fragment.format()}`, "UNEXPECTED_ARGUMENT", { count: values.length, expectedCount: fragment.inputs.length });
        const topics = [];
        if (!fragment.anonymous) {
            topics.push(fragment.topicHash);
        }
        // @TODO: Use the coders for this; to properly support tuples, etc.
        const encodeTopic = (param, value) => {
            if (param.type === "string") {
                return (0, index_js_2.id)(value);
            }
            else if (param.type === "bytes") {
                return (0, index_js_1.keccak256)((0, index_js_3.hexlify)(value));
            }
            if (param.type === "bool" && typeof (value) === "boolean") {
                value = (value ? "0x01" : "0x00");
            }
            else if (param.type.match(/^u?int/)) {
                value = (0, index_js_3.toBeHex)(value); // @TODO: Should this toTwos??
            }
            else if (param.type.match(/^bytes/)) {
                value = (0, index_js_3.zeroPadBytes)(value, 32);
            }
            else if (param.type === "address") {
                // Check addresses are valid
                this.#abiCoder.encode(["address"], [value]);
            }
            return (0, index_js_3.zeroPadValue)((0, index_js_3.hexlify)(value), 32);
        };
        values.forEach((value, index) => {
            const param = fragment.inputs[index];
            if (!param.indexed) {
                (0, index_js_3.assertArgument)(value == null, "cannot filter non-indexed parameters; must be null", ("contract." + param.name), value);
                return;
            }
            if (value == null) {
                topics.push(null);
            }
            else if (param.baseType === "array" || param.baseType === "tuple") {
                (0, index_js_3.assertArgument)(false, "filtering with tuples or arrays not supported", ("contract." + param.name), value);
            }
            else if (Array.isArray(value)) {
                topics.push(value.map((value) => encodeTopic(param, value)));
            }
            else {
                topics.push(encodeTopic(param, value));
            }
        });
        // Trim off trailing nulls
        while (topics.length && topics[topics.length - 1] === null) {
            topics.pop();
        }
        return topics;