Method #getEvent

js/src/static_dependencies/ethers/interface.js:374–431

(key, values, forceUnique)

    }
    // Find an event definition by any means necessary (unless it is ambiguous)
    #getEvent(key, values, forceUnique) {
        // EventTopic
        if (isHexString(key)) {
            const eventTopic = key.toLowerCase();
            for (const fragment of this.#events.values()) {
                if (eventTopic === fragment.topicHash) {
                    return fragment;
                }
            }
            return null;
        }
        // It is a bare name, look up the function (will return null if ambiguous)
        if (key.indexOf("(") === -1) {
            const matching = [];
            for (const [name, fragment] of this.#events) {
                if (name.split("(" /* fix:) */)[0] === key) {
                    matching.push(fragment);
                }
            }
            if (values) {
                // Remove all matches that don't have a compatible length.
                for (let i = matching.length - 1; i >= 0; i--) {
                    if (matching[i].inputs.length < values.length) {
                        matching.splice(i, 1);
                    }
                }
                // Remove all matches that don't match the Typed signature
                for (let i = matching.length - 1; i >= 0; i--) {
                    const inputs = matching[i].inputs;
                    for (let j = 0; j < values.length; j++) {
                        // Not a typed value
                        if (!Typed.isTyped(values[j])) {
                            continue;
                        }
                        // Make sure the value type matches the input type
                        if (values[j].type !== inputs[j].baseType) {
                            matching.splice(i, 1);
                            break;
                        }
                    }
                }
            }
            if (matching.length === 0) {
                return null;
            }
            if (matching.length > 1 && forceUnique) {
                const matchStr = matching.map((m) => JSON.stringify(m.format())).join(", ");
                assertArgument(false, `ambiguous event description (i.e. matches ${matchStr})`, "key", key);
            }
            return matching[0];
        }
        // Normalize the signature and lookup the function
        const result = this.#events.get(EventFragment.from(key).format());
        if (result) {
            return result;
        }
        return null;
    }