771 lines
27 KiB
JavaScript
771 lines
27 KiB
JavaScript
"use strict";
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import { BigNumber } from "@ethersproject/bignumber";
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import { defineReadOnly } from "@ethersproject/properties";
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import { Logger } from "@ethersproject/logger";
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import { version } from "./_version";
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const logger = new Logger(version);
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;
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const _constructorGuard = {};
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let ModifiersBytes = { calldata: true, memory: true, storage: true };
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function checkModifier(type, name) {
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if (type === "bytes" || type === "string") {
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if (ModifiersBytes[name]) {
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return true;
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}
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}
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else if (type === "address") {
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if (name === "payable") {
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return true;
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}
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}
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if (ModifiersBytes[name] || name === "payable") {
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logger.throwArgumentError("invalid modifier", "name", name);
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}
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return false;
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}
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// @TODO: Make sure that children of an indexed tuple are marked with a null indexed
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function parseParamType(param, allowIndexed) {
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let originalParam = param;
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function throwError(i) {
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logger.throwArgumentError(`unexpected character at position ${i}`, "param", param);
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}
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param = param.replace(/\s/g, " ");
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function newNode(parent) {
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let node = { type: "", name: "", parent: parent, state: { allowType: true } };
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if (allowIndexed) {
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node.indexed = false;
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}
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return node;
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}
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let parent = { type: "", name: "", state: { allowType: true } };
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let node = parent;
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for (let i = 0; i < param.length; i++) {
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let c = param[i];
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switch (c) {
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case "(":
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if (node.state.allowType && node.type === "") {
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node.type = "tuple";
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}
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else if (!node.state.allowParams) {
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throwError(i);
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}
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node.state.allowType = false;
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node.type = verifyType(node.type);
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node.components = [newNode(node)];
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node = node.components[0];
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break;
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case ")":
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delete node.state;
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if (node.name === "indexed") {
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if (!allowIndexed) {
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throwError(i);
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}
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node.indexed = true;
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node.name = "";
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}
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if (checkModifier(node.type, node.name)) {
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node.name = "";
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}
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node.type = verifyType(node.type);
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let child = node;
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node = node.parent;
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if (!node) {
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throwError(i);
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}
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delete child.parent;
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node.state.allowParams = false;
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node.state.allowName = true;
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node.state.allowArray = true;
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break;
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case ",":
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delete node.state;
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if (node.name === "indexed") {
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if (!allowIndexed) {
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throwError(i);
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}
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node.indexed = true;
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node.name = "";
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}
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if (checkModifier(node.type, node.name)) {
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node.name = "";
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}
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node.type = verifyType(node.type);
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let sibling = newNode(node.parent);
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//{ type: "", name: "", parent: node.parent, state: { allowType: true } };
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node.parent.components.push(sibling);
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delete node.parent;
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node = sibling;
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break;
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// Hit a space...
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case " ":
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// If reading type, the type is done and may read a param or name
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if (node.state.allowType) {
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if (node.type !== "") {
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node.type = verifyType(node.type);
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delete node.state.allowType;
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node.state.allowName = true;
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node.state.allowParams = true;
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}
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}
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// If reading name, the name is done
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if (node.state.allowName) {
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if (node.name !== "") {
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if (node.name === "indexed") {
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if (!allowIndexed) {
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throwError(i);
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}
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if (node.indexed) {
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throwError(i);
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}
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node.indexed = true;
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node.name = "";
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}
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else if (checkModifier(node.type, node.name)) {
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node.name = "";
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}
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else {
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node.state.allowName = false;
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}
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}
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}
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break;
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case "[":
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if (!node.state.allowArray) {
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throwError(i);
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}
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node.type += c;
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node.state.allowArray = false;
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node.state.allowName = false;
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node.state.readArray = true;
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break;
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case "]":
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if (!node.state.readArray) {
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throwError(i);
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}
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node.type += c;
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node.state.readArray = false;
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node.state.allowArray = true;
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node.state.allowName = true;
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break;
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default:
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if (node.state.allowType) {
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node.type += c;
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node.state.allowParams = true;
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node.state.allowArray = true;
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}
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else if (node.state.allowName) {
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node.name += c;
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delete node.state.allowArray;
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}
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else if (node.state.readArray) {
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node.type += c;
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}
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else {
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throwError(i);
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}
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}
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}
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if (node.parent) {
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logger.throwArgumentError("unexpected eof", "param", param);
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}
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delete parent.state;
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if (node.name === "indexed") {
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if (!allowIndexed) {
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throwError(originalParam.length - 7);
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}
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if (node.indexed) {
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throwError(originalParam.length - 7);
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}
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node.indexed = true;
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node.name = "";
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}
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else if (checkModifier(node.type, node.name)) {
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node.name = "";
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}
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parent.type = verifyType(parent.type);
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return parent;
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}
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function populate(object, params) {
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for (let key in params) {
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defineReadOnly(object, key, params[key]);
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}
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}
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export const FormatTypes = Object.freeze({
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// Bare formatting, as is needed for computing a sighash of an event or function
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sighash: "sighash",
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// Human-Readable with Minimal spacing and without names (compact human-readable)
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minimal: "minimal",
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// Human-Readble with nice spacing, including all names
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full: "full",
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// JSON-format a la Solidity
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json: "json"
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});
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const paramTypeArray = new RegExp(/^(.*)\[([0-9]*)\]$/);
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export class ParamType {
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constructor(constructorGuard, params) {
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if (constructorGuard !== _constructorGuard) {
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logger.throwError("use fromString", Logger.errors.UNSUPPORTED_OPERATION, {
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operation: "new ParamType()"
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});
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}
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populate(this, params);
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let match = this.type.match(paramTypeArray);
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if (match) {
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populate(this, {
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arrayLength: parseInt(match[2] || "-1"),
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arrayChildren: ParamType.fromObject({
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type: match[1],
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components: this.components
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}),
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baseType: "array"
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});
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}
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else {
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populate(this, {
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arrayLength: null,
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arrayChildren: null,
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baseType: ((this.components != null) ? "tuple" : this.type)
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});
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}
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this._isParamType = true;
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Object.freeze(this);
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}
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// Format the parameter fragment
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// - sighash: "(uint256,address)"
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// - minimal: "tuple(uint256,address) indexed"
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// - full: "tuple(uint256 foo, addres bar) indexed baz"
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format(format) {
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if (!format) {
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format = FormatTypes.sighash;
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}
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if (!FormatTypes[format]) {
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logger.throwArgumentError("invalid format type", "format", format);
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}
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if (format === FormatTypes.json) {
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let result = {
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type: ((this.baseType === "tuple") ? "tuple" : this.type),
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name: (this.name || undefined)
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};
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if (typeof (this.indexed) === "boolean") {
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result.indexed = this.indexed;
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}
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if (this.components) {
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result.components = this.components.map((comp) => JSON.parse(comp.format(format)));
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}
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return JSON.stringify(result);
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}
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let result = "";
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// Array
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if (this.baseType === "array") {
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result += this.arrayChildren.format(format);
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result += "[" + (this.arrayLength < 0 ? "" : String(this.arrayLength)) + "]";
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}
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else {
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if (this.baseType === "tuple") {
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if (format !== FormatTypes.sighash) {
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result += this.type;
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}
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result += "(" + this.components.map((comp) => comp.format(format)).join((format === FormatTypes.full) ? ", " : ",") + ")";
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}
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else {
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result += this.type;
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}
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}
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if (format !== FormatTypes.sighash) {
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if (this.indexed === true) {
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result += " indexed";
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}
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if (format === FormatTypes.full && this.name) {
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result += " " + this.name;
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}
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}
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return result;
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}
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static from(value, allowIndexed) {
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if (typeof (value) === "string") {
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return ParamType.fromString(value, allowIndexed);
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}
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return ParamType.fromObject(value);
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}
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static fromObject(value) {
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if (ParamType.isParamType(value)) {
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return value;
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}
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return new ParamType(_constructorGuard, {
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name: (value.name || null),
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type: verifyType(value.type),
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indexed: ((value.indexed == null) ? null : !!value.indexed),
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components: (value.components ? value.components.map(ParamType.fromObject) : null)
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});
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}
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static fromString(value, allowIndexed) {
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function ParamTypify(node) {
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return ParamType.fromObject({
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name: node.name,
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type: node.type,
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indexed: node.indexed,
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components: node.components
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});
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}
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return ParamTypify(parseParamType(value, !!allowIndexed));
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}
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static isParamType(value) {
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return !!(value != null && value._isParamType);
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}
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}
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;
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function parseParams(value, allowIndex) {
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return splitNesting(value).map((param) => ParamType.fromString(param, allowIndex));
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}
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export class Fragment {
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constructor(constructorGuard, params) {
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if (constructorGuard !== _constructorGuard) {
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logger.throwError("use a static from method", Logger.errors.UNSUPPORTED_OPERATION, {
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operation: "new Fragment()"
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});
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}
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populate(this, params);
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this._isFragment = true;
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Object.freeze(this);
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}
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static from(value) {
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if (Fragment.isFragment(value)) {
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return value;
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}
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if (typeof (value) === "string") {
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return Fragment.fromString(value);
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}
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return Fragment.fromObject(value);
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}
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static fromObject(value) {
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if (Fragment.isFragment(value)) {
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return value;
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}
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switch (value.type) {
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case "function":
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return FunctionFragment.fromObject(value);
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case "event":
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return EventFragment.fromObject(value);
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case "constructor":
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return ConstructorFragment.fromObject(value);
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case "fallback":
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case "receive":
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// @TODO: Something? Maybe return a FunctionFragment? A custom DefaultFunctionFragment?
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return null;
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}
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return logger.throwArgumentError("invalid fragment object", "value", value);
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}
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static fromString(value) {
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// Make sure the "returns" is surrounded by a space and all whitespace is exactly one space
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value = value.replace(/\s/g, " ");
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value = value.replace(/\(/g, " (").replace(/\)/g, ") ").replace(/\s+/g, " ");
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value = value.trim();
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if (value.split(" ")[0] === "event") {
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return EventFragment.fromString(value.substring(5).trim());
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}
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else if (value.split(" ")[0] === "function") {
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return FunctionFragment.fromString(value.substring(8).trim());
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}
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else if (value.split("(")[0].trim() === "constructor") {
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return ConstructorFragment.fromString(value.trim());
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}
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return logger.throwArgumentError("unsupported fragment", "value", value);
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}
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static isFragment(value) {
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return !!(value && value._isFragment);
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}
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}
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export class EventFragment extends Fragment {
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format(format) {
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if (!format) {
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format = FormatTypes.sighash;
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}
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if (!FormatTypes[format]) {
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logger.throwArgumentError("invalid format type", "format", format);
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}
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if (format === FormatTypes.json) {
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return JSON.stringify({
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type: "event",
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anonymous: this.anonymous,
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name: this.name,
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inputs: this.inputs.map((input) => JSON.parse(input.format(format)))
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});
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}
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let result = "";
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if (format !== FormatTypes.sighash) {
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result += "event ";
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}
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result += this.name + "(" + this.inputs.map((input) => input.format(format)).join((format === FormatTypes.full) ? ", " : ",") + ") ";
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if (format !== FormatTypes.sighash) {
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if (this.anonymous) {
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result += "anonymous ";
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}
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}
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return result.trim();
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}
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static from(value) {
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if (typeof (value) === "string") {
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return EventFragment.fromString(value);
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}
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return EventFragment.fromObject(value);
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}
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static fromObject(value) {
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if (EventFragment.isEventFragment(value)) {
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return value;
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}
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if (value.type !== "event") {
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logger.throwArgumentError("invalid event object", "value", value);
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}
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return new EventFragment(_constructorGuard, {
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name: verifyIdentifier(value.name),
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anonymous: value.anonymous,
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inputs: (value.inputs ? value.inputs.map(ParamType.fromObject) : []),
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type: "event"
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});
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}
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static fromString(value) {
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let match = value.match(regexParen);
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if (!match) {
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logger.throwArgumentError("invalid event string", "value", value);
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}
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let anonymous = false;
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match[3].split(" ").forEach((modifier) => {
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switch (modifier.trim()) {
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case "anonymous":
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anonymous = true;
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break;
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case "":
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break;
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default:
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logger.warn("unknown modifier: " + modifier);
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}
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});
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return EventFragment.fromObject({
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name: match[1].trim(),
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anonymous: anonymous,
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inputs: parseParams(match[2], true),
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type: "event"
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});
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}
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static isEventFragment(value) {
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return (value && value._isFragment && value.type === "event");
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}
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}
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function parseGas(value, params) {
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params.gas = null;
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let comps = value.split("@");
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if (comps.length !== 1) {
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if (comps.length > 2) {
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logger.throwArgumentError("invalid human-readable ABI signature", "value", value);
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}
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if (!comps[1].match(/^[0-9]+$/)) {
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logger.throwArgumentError("invalid human-readable ABI signature gas", "value", value);
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}
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params.gas = BigNumber.from(comps[1]);
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return comps[0];
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}
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return value;
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}
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function parseModifiers(value, params) {
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params.constant = false;
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params.payable = false;
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params.stateMutability = "nonpayable";
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value.split(" ").forEach((modifier) => {
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switch (modifier.trim()) {
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case "constant":
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params.constant = true;
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break;
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case "payable":
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params.payable = true;
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params.stateMutability = "payable";
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break;
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case "pure":
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params.constant = true;
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params.stateMutability = "pure";
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break;
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case "view":
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params.constant = true;
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params.stateMutability = "view";
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break;
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case "external":
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case "public":
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case "":
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break;
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default:
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console.log("unknown modifier: " + modifier);
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}
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});
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}
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function verifyState(value) {
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let result = {
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constant: false,
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payable: true,
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stateMutability: "payable"
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};
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if (value.stateMutability != null) {
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result.stateMutability = value.stateMutability;
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// Set (and check things are consistent) the constant property
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result.constant = (result.stateMutability === "view" || result.stateMutability === "pure");
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if (value.constant != null) {
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if ((!!value.constant) !== result.constant) {
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logger.throwArgumentError("cannot have constant function with mutability " + result.stateMutability, "value", value);
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}
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}
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// Set (and check things are consistent) the payable property
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result.payable = (result.stateMutability === "payable");
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if (value.payable != null) {
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if ((!!value.payable) !== result.payable) {
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logger.throwArgumentError("cannot have payable function with mutability " + result.stateMutability, "value", value);
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}
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}
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}
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else if (value.payable != null) {
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result.payable = !!value.payable;
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// If payable we can assume non-constant; otherwise we can't assume
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if (value.constant == null && !result.payable && value.type !== "constructor") {
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logger.throwArgumentError("unable to determine stateMutability", "value", value);
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}
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result.constant = !!value.constant;
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if (result.constant) {
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result.stateMutability = "view";
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}
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else {
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result.stateMutability = (result.payable ? "payable" : "nonpayable");
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}
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if (result.payable && result.constant) {
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logger.throwArgumentError("cannot have constant payable function", "value", value);
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}
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}
|
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else if (value.constant != null) {
|
|
result.constant = !!value.constant;
|
|
result.payable = !result.constant;
|
|
result.stateMutability = (result.constant ? "view" : "payable");
|
|
}
|
|
else if (value.type !== "constructor") {
|
|
logger.throwArgumentError("unable to determine stateMutability", "value", value);
|
|
}
|
|
return result;
|
|
}
|
|
export class ConstructorFragment extends Fragment {
|
|
format(format) {
|
|
if (!format) {
|
|
format = FormatTypes.sighash;
|
|
}
|
|
if (!FormatTypes[format]) {
|
|
logger.throwArgumentError("invalid format type", "format", format);
|
|
}
|
|
if (format === FormatTypes.json) {
|
|
return JSON.stringify({
|
|
type: "constructor",
|
|
stateMutability: ((this.stateMutability !== "nonpayable") ? this.stateMutability : undefined),
|
|
payble: this.payable,
|
|
gas: (this.gas ? this.gas.toNumber() : undefined),
|
|
inputs: this.inputs.map((input) => JSON.parse(input.format(format)))
|
|
});
|
|
}
|
|
if (format === FormatTypes.sighash) {
|
|
logger.throwError("cannot format a constructor for sighash", Logger.errors.UNSUPPORTED_OPERATION, {
|
|
operation: "format(sighash)"
|
|
});
|
|
}
|
|
let result = "constructor(" + this.inputs.map((input) => input.format(format)).join((format === FormatTypes.full) ? ", " : ",") + ") ";
|
|
if (this.stateMutability && this.stateMutability !== "nonpayable") {
|
|
result += this.stateMutability + " ";
|
|
}
|
|
return result.trim();
|
|
}
|
|
static from(value) {
|
|
if (typeof (value) === "string") {
|
|
return ConstructorFragment.fromString(value);
|
|
}
|
|
return ConstructorFragment.fromObject(value);
|
|
}
|
|
static fromObject(value) {
|
|
if (ConstructorFragment.isConstructorFragment(value)) {
|
|
return value;
|
|
}
|
|
if (value.type !== "constructor") {
|
|
logger.throwArgumentError("invalid constructor object", "value", value);
|
|
}
|
|
let state = verifyState(value);
|
|
if (state.constant) {
|
|
logger.throwArgumentError("constructor cannot be constant", "value", value);
|
|
}
|
|
return new ConstructorFragment(_constructorGuard, {
|
|
name: null,
|
|
type: value.type,
|
|
inputs: (value.inputs ? value.inputs.map(ParamType.fromObject) : []),
|
|
payable: state.payable,
|
|
gas: (value.gas ? BigNumber.from(value.gas) : null)
|
|
});
|
|
}
|
|
static fromString(value) {
|
|
let params = { type: "constructor" };
|
|
value = parseGas(value, params);
|
|
let parens = value.match(regexParen);
|
|
if (!parens || parens[1].trim() !== "constructor") {
|
|
logger.throwArgumentError("invalid constructor string", "value", value);
|
|
}
|
|
params.inputs = parseParams(parens[2].trim(), false);
|
|
parseModifiers(parens[3].trim(), params);
|
|
return ConstructorFragment.fromObject(params);
|
|
}
|
|
static isConstructorFragment(value) {
|
|
return (value && value._isFragment && value.type === "constructor");
|
|
}
|
|
}
|
|
export class FunctionFragment extends ConstructorFragment {
|
|
format(format) {
|
|
if (!format) {
|
|
format = FormatTypes.sighash;
|
|
}
|
|
if (!FormatTypes[format]) {
|
|
logger.throwArgumentError("invalid format type", "format", format);
|
|
}
|
|
if (format === FormatTypes.json) {
|
|
return JSON.stringify({
|
|
type: "function",
|
|
name: this.name,
|
|
constant: this.constant,
|
|
stateMutability: ((this.stateMutability !== "nonpayable") ? this.stateMutability : undefined),
|
|
payble: this.payable,
|
|
gas: (this.gas ? this.gas.toNumber() : undefined),
|
|
inputs: this.inputs.map((input) => JSON.parse(input.format(format))),
|
|
ouputs: this.outputs.map((output) => JSON.parse(output.format(format))),
|
|
});
|
|
}
|
|
let result = "";
|
|
if (format !== FormatTypes.sighash) {
|
|
result += "function ";
|
|
}
|
|
result += this.name + "(" + this.inputs.map((input) => input.format(format)).join((format === FormatTypes.full) ? ", " : ",") + ") ";
|
|
if (format !== FormatTypes.sighash) {
|
|
if (this.stateMutability) {
|
|
if (this.stateMutability !== "nonpayable") {
|
|
result += (this.stateMutability + " ");
|
|
}
|
|
}
|
|
else if (this.constant) {
|
|
result += "view ";
|
|
}
|
|
if (this.outputs && this.outputs.length) {
|
|
result += "returns (" + this.outputs.map((output) => output.format(format)).join(", ") + ") ";
|
|
}
|
|
if (this.gas != null) {
|
|
result += "@" + this.gas.toString() + " ";
|
|
}
|
|
}
|
|
return result.trim();
|
|
}
|
|
static from(value) {
|
|
if (typeof (value) === "string") {
|
|
return FunctionFragment.fromString(value);
|
|
}
|
|
return FunctionFragment.fromObject(value);
|
|
}
|
|
static fromObject(value) {
|
|
if (FunctionFragment.isFunctionFragment(value)) {
|
|
return value;
|
|
}
|
|
if (value.type !== "function") {
|
|
logger.throwArgumentError("invalid function object", "value", value);
|
|
}
|
|
let state = verifyState(value);
|
|
return new FunctionFragment(_constructorGuard, {
|
|
type: value.type,
|
|
name: verifyIdentifier(value.name),
|
|
constant: state.constant,
|
|
inputs: (value.inputs ? value.inputs.map(ParamType.fromObject) : []),
|
|
outputs: (value.outputs ? value.outputs.map(ParamType.fromObject) : []),
|
|
payable: state.payable,
|
|
stateMutability: state.stateMutability,
|
|
gas: (value.gas ? BigNumber.from(value.gas) : null)
|
|
});
|
|
}
|
|
static fromString(value) {
|
|
let params = { type: "function" };
|
|
value = parseGas(value, params);
|
|
let comps = value.split(" returns ");
|
|
if (comps.length > 2) {
|
|
logger.throwArgumentError("invalid function string", "value", value);
|
|
}
|
|
let parens = comps[0].match(regexParen);
|
|
if (!parens) {
|
|
logger.throwArgumentError("invalid function signature", "value", value);
|
|
}
|
|
params.name = parens[1].trim();
|
|
if (params.name) {
|
|
verifyIdentifier(params.name);
|
|
}
|
|
params.inputs = parseParams(parens[2], false);
|
|
parseModifiers(parens[3].trim(), params);
|
|
// We have outputs
|
|
if (comps.length > 1) {
|
|
let returns = comps[1].match(regexParen);
|
|
if (returns[1].trim() != "" || returns[3].trim() != "") {
|
|
logger.throwArgumentError("unexpected tokens", "value", value);
|
|
}
|
|
params.outputs = parseParams(returns[2], false);
|
|
}
|
|
else {
|
|
params.outputs = [];
|
|
}
|
|
return FunctionFragment.fromObject(params);
|
|
}
|
|
static isFunctionFragment(value) {
|
|
return (value && value._isFragment && value.type === "function");
|
|
}
|
|
}
|
|
//export class ErrorFragment extends Fragment {
|
|
//}
|
|
//export class StructFragment extends Fragment {
|
|
//}
|
|
function verifyType(type) {
|
|
// These need to be transformed to their full description
|
|
if (type.match(/^uint($|[^1-9])/)) {
|
|
type = "uint256" + type.substring(4);
|
|
}
|
|
else if (type.match(/^int($|[^1-9])/)) {
|
|
type = "int256" + type.substring(3);
|
|
}
|
|
// @TODO: more verification
|
|
return type;
|
|
}
|
|
const regexIdentifier = new RegExp("^[A-Za-z_][A-Za-z0-9_]*$");
|
|
function verifyIdentifier(value) {
|
|
if (!value || !value.match(regexIdentifier)) {
|
|
logger.throwArgumentError(`invalid identifier "${value}"`, "value", value);
|
|
}
|
|
return value;
|
|
}
|
|
const regexParen = new RegExp("^([^)(]*)\\((.*)\\)([^)(]*)$");
|
|
function splitNesting(value) {
|
|
value = value.trim();
|
|
let result = [];
|
|
let accum = "";
|
|
let depth = 0;
|
|
for (let offset = 0; offset < value.length; offset++) {
|
|
let c = value[offset];
|
|
if (c === "," && depth === 0) {
|
|
result.push(accum);
|
|
accum = "";
|
|
}
|
|
else {
|
|
accum += c;
|
|
if (c === "(") {
|
|
depth++;
|
|
}
|
|
else if (c === ")") {
|
|
depth--;
|
|
if (depth === -1) {
|
|
logger.throwArgumentError("unbalanced parenthesis", "value", value);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
if (accum) {
|
|
result.push(accum);
|
|
}
|
|
return result;
|
|
}
|