ethers.js/lib.esm/abi/fragments.js
2022-10-20 05:03:32 -04:00

918 lines
33 KiB
JavaScript

import { defineProperties, getBigInt, getNumber, assertPrivate, throwArgumentError, throwError } from "../utils/index.js";
import { id } from "../hash/index.js";
;
// [ "a", "b" ] => { "a": 1, "b": 1 }
function setify(items) {
const result = new Set();
items.forEach((k) => result.add(k));
return Object.freeze(result);
}
// Visibility Keywords
const _kwVisib = "constant external internal payable private public pure view";
const KwVisib = setify(_kwVisib.split(" "));
const _kwTypes = "constructor error event function struct";
const KwTypes = setify(_kwTypes.split(" "));
const _kwModifiers = "calldata memory storage payable indexed";
const KwModifiers = setify(_kwModifiers.split(" "));
const _kwOther = "tuple returns";
// All Keywords
const _keywords = [_kwTypes, _kwModifiers, _kwOther, _kwVisib].join(" ");
const Keywords = setify(_keywords.split(" "));
// Single character tokens
const SimpleTokens = {
"(": "OPEN_PAREN", ")": "CLOSE_PAREN",
"[": "OPEN_BRACKET", "]": "CLOSE_BRACKET",
",": "COMMA", "@": "AT"
};
// Parser regexes to consume the next token
const regexWhitespace = new RegExp("^(\\s*)");
const regexNumber = new RegExp("^([0-9]+)");
const regexIdentifier = new RegExp("^([a-zA-Z$_][a-zA-Z0-9$_]*)");
const regexType = new RegExp("^(address|bool|bytes([0-9]*)|string|u?int([0-9]*))");
class TokenString {
#offset;
#tokens;
get offset() { return this.#offset; }
get length() { return this.#tokens.length - this.#offset; }
constructor(tokens) {
this.#offset = 0;
this.#tokens = tokens.slice();
}
clone() { return new TokenString(this.#tokens); }
reset() { this.#offset = 0; }
#subTokenString(from = 0, to = 0) {
return new TokenString(this.#tokens.slice(from, to).map((t) => {
return Object.freeze(Object.assign({}, t, {
match: (t.match - from),
linkBack: (t.linkBack - from),
linkNext: (t.linkNext - from),
}));
return t;
}));
}
// Pops and returns the value of the next token, if it is a keyword in allowed; throws if out of tokens
popKeyword(allowed) {
const top = this.peek();
if (top.type !== "KEYWORD" || !allowed.has(top.text)) {
throw new Error(`expected keyword ${top.text}`);
}
return this.pop().text;
}
// Pops and returns the value of the next token if it is `type`; throws if out of tokens
popType(type) {
if (this.peek().type !== type) {
throw new Error(`expected ${type}; got ${JSON.stringify(this.peek())}`);
}
return this.pop().text;
}
// Pops and returns a "(" TOKENS ")"
popParen() {
const top = this.peek();
if (top.type !== "OPEN_PAREN") {
throw new Error("bad start");
}
const result = this.#subTokenString(this.#offset + 1, top.match + 1);
this.#offset = top.match + 1;
return result;
}
// Pops and returns the items within "(" ITEM1 "," ITEM2 "," ... ")"
popParams() {
const top = this.peek();
if (top.type !== "OPEN_PAREN") {
throw new Error("bad start");
}
const result = [];
while (this.#offset < top.match - 1) {
const link = this.peek().linkNext;
result.push(this.#subTokenString(this.#offset + 1, link));
this.#offset = link;
}
this.#offset = top.match + 1;
return result;
}
// Returns the top Token, throwing if out of tokens
peek() {
if (this.#offset >= this.#tokens.length) {
throw new Error("out-of-bounds");
}
return this.#tokens[this.#offset];
}
// Returns the next value, if it is a keyword in `allowed`
peekKeyword(allowed) {
const top = this.peekType("KEYWORD");
return (top != null && allowed.has(top)) ? top : null;
}
// Returns the value of the next token if it is `type`
peekType(type) {
if (this.length === 0) {
return null;
}
const top = this.peek();
return (top.type === type) ? top.text : null;
}
// Returns the next token; throws if out of tokens
pop() {
const result = this.peek();
this.#offset++;
return result;
}
toString() {
const tokens = [];
for (let i = this.#offset; i < this.#tokens.length; i++) {
const token = this.#tokens[i];
tokens.push(`${token.type}:${token.text}`);
}
return `<TokenString ${tokens.join(" ")}>`;
}
}
function lex(text) {
const tokens = [];
const throwError = (message) => {
const token = (offset < text.length) ? JSON.stringify(text[offset]) : "$EOI";
throw new Error(`invalid token ${token} at ${offset}: ${message}`);
};
let brackets = [];
let commas = [];
let offset = 0;
while (offset < text.length) {
// Strip off any leading whitespace
let cur = text.substring(offset);
let match = cur.match(regexWhitespace);
if (match) {
offset += match[1].length;
cur = text.substring(offset);
}
const token = { depth: brackets.length, linkBack: -1, linkNext: -1, match: -1, type: "", text: "", offset, value: -1 };
tokens.push(token);
let type = (SimpleTokens[cur[0]] || "");
if (type) {
token.type = type;
token.text = cur[0];
offset++;
if (type === "OPEN_PAREN") {
brackets.push(tokens.length - 1);
commas.push(tokens.length - 1);
}
else if (type == "CLOSE_PAREN") {
if (brackets.length === 0) {
throwError("no matching open bracket");
}
token.match = brackets.pop();
(tokens[token.match]).match = tokens.length - 1;
token.depth--;
token.linkBack = commas.pop();
(tokens[token.linkBack]).linkNext = tokens.length - 1;
}
else if (type === "COMMA") {
token.linkBack = commas.pop();
(tokens[token.linkBack]).linkNext = tokens.length - 1;
commas.push(tokens.length - 1);
}
else if (type === "OPEN_BRACKET") {
token.type = "BRACKET";
}
else if (type === "CLOSE_BRACKET") {
// Remove the CLOSE_BRACKET
let suffix = tokens.pop().text;
if (tokens.length > 0 && tokens[tokens.length - 1].type === "NUMBER") {
const value = tokens.pop().text;
suffix = value + suffix;
(tokens[tokens.length - 1]).value = getNumber(value);
}
if (tokens.length === 0 || tokens[tokens.length - 1].type !== "BRACKET") {
throw new Error("missing opening bracket");
}
(tokens[tokens.length - 1]).text += suffix;
}
continue;
}
match = cur.match(regexIdentifier);
if (match) {
token.text = match[1];
offset += token.text.length;
if (Keywords.has(token.text)) {
token.type = "KEYWORD";
continue;
}
if (token.text.match(regexType)) {
token.type = "TYPE";
continue;
}
token.type = "ID";
continue;
}
match = cur.match(regexNumber);
if (match) {
token.text = match[1];
token.type = "NUMBER";
offset += token.text.length;
continue;
}
throw new Error(`unexpected token ${JSON.stringify(cur[0])} at position ${offset}`);
}
return new TokenString(tokens.map((t) => Object.freeze(t)));
}
// Check only one of `allowed` is in `set`
function allowSingle(set, allowed) {
let included = [];
for (const key in allowed.keys()) {
if (set.has(key)) {
included.push(key);
}
}
if (included.length > 1) {
throw new Error(`conflicting types: ${included.join(", ")}`);
}
}
// Functions to process a Solidity Signature TokenString from left-to-right for...
// ...the name with an optional type, returning the name
function consumeName(type, tokens) {
if (tokens.peekKeyword(KwTypes)) {
const keyword = tokens.pop().text;
if (keyword !== type) {
throw new Error(`expected ${type}, got ${keyword}`);
}
}
return tokens.popType("ID");
}
// ...all keywords matching allowed, returning the keywords
function consumeKeywords(tokens, allowed) {
const keywords = new Set();
while (true) {
const keyword = tokens.peekType("KEYWORD");
if (keyword == null || (allowed && !allowed.has(keyword))) {
break;
}
tokens.pop();
if (keywords.has(keyword)) {
throw new Error(`duplicate keywords: ${JSON.stringify(keyword)}`);
}
keywords.add(keyword);
}
return Object.freeze(keywords);
}
// ...all visibility keywords, returning the coalesced mutability
function consumeMutability(tokens) {
let modifiers = consumeKeywords(tokens, KwVisib);
// Detect conflicting modifiers
allowSingle(modifiers, setify("constant payable nonpayable".split(" ")));
allowSingle(modifiers, setify("pure view payable nonpayable".split(" ")));
// Process mutability states
if (modifiers.has("view")) {
return "view";
}
if (modifiers.has("pure")) {
return "pure";
}
if (modifiers.has("payable")) {
return "payable";
}
if (modifiers.has("nonpayable")) {
return "nonpayable";
}
// Process legacy `constant` last
if (modifiers.has("constant")) {
return "view";
}
return "nonpayable";
}
// ...a parameter list, returning the ParamType list
function consumeParams(tokens, allowIndexed) {
return tokens.popParams().map((t) => ParamType.from(t, allowIndexed));
}
// ...a gas limit, returning a BigNumber or null if none
function consumeGas(tokens) {
if (tokens.peekType("AT")) {
tokens.pop();
if (tokens.peekType("NUMBER")) {
return getBigInt(tokens.pop().text);
}
throw new Error("invalid gas");
}
return null;
}
function consumeEoi(tokens) {
if (tokens.length) {
throw new Error(`unexpected tokens: ${tokens.toString()}`);
}
}
const regexArrayType = new RegExp(/^(.*)\[([0-9]*)\]$/);
function verifyBasicType(type) {
const match = type.match(regexType);
if (!match) {
return throwArgumentError("invalid type", "type", type);
}
if (type === "uint") {
return "uint256";
}
if (type === "int") {
return "int256";
}
if (match[2]) {
// bytesXX
const length = parseInt(match[2]);
if (length === 0 || length > 32) {
throwArgumentError("invalid bytes length", "type", type);
}
}
else if (match[3]) {
// intXX or uintXX
const size = parseInt(match[3]);
if (size === 0 || size > 256 || size % 8) {
throwArgumentError("invalid numeric width", "type", type);
}
}
return type;
}
// Make the Fragment constructors effectively private
const _guard = {};
const internal = Symbol.for("_ethers_internal");
const ParamTypeInternal = "_ParamTypeInternal";
const ErrorFragmentInternal = "_ErrorInternal";
const EventFragmentInternal = "_EventInternal";
const ConstructorFragmentInternal = "_ConstructorInternal";
const FunctionFragmentInternal = "_FunctionInternal";
const StructFragmentInternal = "_StructInternal";
export class ParamType {
// The local name of the parameter (of "" if unbound)
name;
// The fully qualified type (e.g. "address", "tuple(address)", "uint256[3][]"
type;
// The base type (e.g. "address", "tuple", "array")
baseType;
// Indexable Paramters ONLY (otherwise null)
indexed;
// Tuples ONLY: (otherwise null)
// - sub-components
components;
// Arrays ONLY: (otherwise null)
// - length of the array (-1 for dynamic length)
// - child type
arrayLength;
arrayChildren;
constructor(guard, name, type, baseType, indexed, components, arrayLength, arrayChildren) {
assertPrivate(guard, _guard, "ParamType");
Object.defineProperty(this, internal, { value: ParamTypeInternal });
if (components) {
components = Object.freeze(components.slice());
}
if (baseType === "array") {
if (arrayLength == null || arrayChildren == null) {
throw new Error("");
}
}
else if (arrayLength != null || arrayChildren != null) {
throw new Error("");
}
if (baseType === "tuple") {
if (components == null) {
throw new Error("");
}
}
else if (components != null) {
throw new Error("");
}
defineProperties(this, {
name, type, baseType, indexed, components, arrayLength, arrayChildren
});
}
// Format the parameter fragment
// - sighash: "(uint256,address)"
// - minimal: "tuple(uint256,address) indexed"
// - full: "tuple(uint256 foo, address bar) indexed baz"
format(format = "sighash") {
if (format === "json") {
let result = {
type: ((this.baseType === "tuple") ? "tuple" : this.type),
name: (this.name || undefined)
};
if (typeof (this.indexed) === "boolean") {
result.indexed = this.indexed;
}
if (this.isTuple()) {
result.components = this.components.map((c) => JSON.parse(c.format(format)));
}
return JSON.stringify(result);
}
let result = "";
// Array
if (this.isArray()) {
result += this.arrayChildren.format(format);
result += `[${(this.arrayLength < 0 ? "" : String(this.arrayLength))}]`;
}
else {
if (this.isTuple()) {
if (format !== "sighash") {
result += this.type;
}
result += "(" + this.components.map((comp) => comp.format(format)).join((format === "full") ? ", " : ",") + ")";
}
else {
result += this.type;
}
}
if (format !== "sighash") {
if (this.indexed === true) {
result += " indexed";
}
if (format === "full" && this.name) {
result += " " + this.name;
}
}
return result;
}
static isArray(value) {
return value && (value.baseType === "array");
}
isArray() {
return (this.baseType === "array");
}
isTuple() {
return (this.baseType === "tuple");
}
isIndexable() {
return (this.indexed != null);
}
walk(value, process) {
if (this.isArray()) {
if (!Array.isArray(value)) {
throw new Error("invlaid array value");
}
if (this.arrayLength !== -1 && value.length !== this.arrayLength) {
throw new Error("array is wrong length");
}
const _this = this;
return value.map((v) => (_this.arrayChildren.walk(v, process)));
}
if (this.isTuple()) {
if (!Array.isArray(value)) {
throw new Error("invlaid tuple value");
}
if (value.length !== this.components.length) {
throw new Error("array is wrong length");
}
const _this = this;
return value.map((v, i) => (_this.components[i].walk(v, process)));
}
return process(this.type, value);
}
#walkAsync(promises, value, process, setValue) {
if (this.isArray()) {
if (!Array.isArray(value)) {
throw new Error("invlaid array value");
}
if (this.arrayLength !== -1 && value.length !== this.arrayLength) {
throw new Error("array is wrong length");
}
const childType = this.arrayChildren;
const result = value.slice();
result.forEach((value, index) => {
childType.#walkAsync(promises, value, process, (value) => {
result[index] = value;
});
});
setValue(result);
return;
}
if (this.isTuple()) {
const components = this.components;
// Convert the object into an array
let result;
if (Array.isArray(value)) {
result = value.slice();
}
else {
if (value == null || typeof (value) !== "object") {
throw new Error("invlaid tuple value");
}
result = components.map((param) => {
if (!param.name) {
throw new Error("cannot use object value with unnamed components");
}
if (!(param.name in value)) {
throw new Error(`missing value for component ${param.name}`);
}
return value[param.name];
});
}
if (result.length !== this.components.length) {
throw new Error("array is wrong length");
}
result.forEach((value, index) => {
components[index].#walkAsync(promises, value, process, (value) => {
result[index] = value;
});
});
setValue(result);
return;
}
const result = process(this.type, value);
if (result.then) {
promises.push((async function () { setValue(await result); })());
}
else {
setValue(result);
}
}
async walkAsync(value, process) {
const promises = [];
const result = [value];
this.#walkAsync(promises, value, process, (value) => {
result[0] = value;
});
if (promises.length) {
await Promise.all(promises);
}
return result[0];
}
static from(obj, allowIndexed) {
if (ParamType.isParamType(obj)) {
return obj;
}
if (typeof (obj) === "string") {
return ParamType.from(lex(obj), allowIndexed);
}
else if (obj instanceof TokenString) {
let type = "", baseType = "";
let comps = null;
if (consumeKeywords(obj, setify(["tuple"])).has("tuple") || obj.peekType("OPEN_PAREN")) {
// Tuple
baseType = "tuple";
comps = obj.popParams().map((t) => ParamType.from(t));
type = `tuple(${comps.map((c) => c.format()).join(",")})`;
}
else {
// Normal
type = verifyBasicType(obj.popType("TYPE"));
baseType = type;
}
// Check for Array
let arrayChildren = null;
let arrayLength = null;
while (obj.length && obj.peekType("BRACKET")) {
const bracket = obj.pop(); //arrays[i];
arrayChildren = new ParamType(_guard, "", type, baseType, null, comps, arrayLength, arrayChildren);
arrayLength = bracket.value;
type += bracket.text;
baseType = "array";
comps = null;
}
let indexed = null;
const keywords = consumeKeywords(obj, KwModifiers);
if (keywords.has("indexed")) {
if (!allowIndexed) {
throw new Error("");
}
indexed = true;
}
const name = (obj.peekType("ID") ? obj.pop().text : "");
if (obj.length) {
throw new Error("leftover tokens");
}
return new ParamType(_guard, name, type, baseType, indexed, comps, arrayLength, arrayChildren);
}
const name = obj.name;
if (name && (typeof (name) !== "string" || !name.match(regexIdentifier))) {
throwArgumentError("invalid name", "obj.name", name);
}
let indexed = obj.indexed;
if (indexed != null) {
if (!allowIndexed) {
throwArgumentError("parameter cannot be indexed", "obj.indexed", obj.indexed);
}
indexed = !!indexed;
}
let type = obj.type;
let arrayMatch = type.match(regexArrayType);
if (arrayMatch) {
const arrayLength = arrayMatch[2];
const arrayChildren = ParamType.from({
type: arrayMatch[1],
components: obj.components
});
return new ParamType(_guard, name, type, "array", indexed, null, arrayLength, arrayChildren);
}
if (type === "tuple" || type.substring(0, 5) === "tuple(" || type[0] === "(") {
const comps = (obj.components != null) ? obj.components.map((c) => ParamType.from(c)) : null;
const tuple = new ParamType(_guard, name, type, "tuple", indexed, comps, null, null);
// @TODO: use lexer to validate and normalize type
return tuple;
}
type = verifyBasicType(obj.type);
return new ParamType(_guard, name, type, type, indexed, null, null, null);
}
static isParamType(value) {
return (value && value[internal] === ParamTypeInternal);
}
}
export class Fragment {
type;
inputs;
constructor(guard, type, inputs) {
assertPrivate(guard, _guard, "Fragment");
inputs = Object.freeze(inputs.slice());
defineProperties(this, { type, inputs });
}
static from(obj) {
if (typeof (obj) === "string") {
try {
Fragment.from(JSON.parse(obj));
}
catch (e) { }
return Fragment.from(lex(obj));
}
if (obj instanceof TokenString) {
const type = obj.popKeyword(KwTypes);
switch (type) {
case "constructor": return ConstructorFragment.from(obj);
case "error": return ErrorFragment.from(obj);
case "event": return EventFragment.from(obj);
case "function": return FunctionFragment.from(obj);
case "struct": return StructFragment.from(obj);
}
throw new Error(`unsupported type: ${type}`);
}
if (typeof (obj) === "object") {
switch (obj.type) {
case "constructor": return ConstructorFragment.from(obj);
case "error": return ErrorFragment.from(obj);
case "event": return EventFragment.from(obj);
case "function": return FunctionFragment.from(obj);
case "struct": return StructFragment.from(obj);
}
throw new Error(`not implemented yet: ${obj.type}`);
}
throw new Error(`unsupported type: ${obj}`);
}
static isConstructor(value) {
return ConstructorFragment.isFragment(value);
}
static isError(value) {
return ErrorFragment.isFragment(value);
}
static isEvent(value) {
return EventFragment.isFragment(value);
}
static isFunction(value) {
return FunctionFragment.isFragment(value);
}
static isStruct(value) {
return StructFragment.isFragment(value);
}
}
export class NamedFragment extends Fragment {
name;
constructor(guard, type, name, inputs) {
super(guard, type, inputs);
if (typeof (name) !== "string" || !name.match(regexIdentifier)) {
throwArgumentError("invalid identifier", "name", name);
}
inputs = Object.freeze(inputs.slice());
defineProperties(this, { name });
}
}
function joinParams(format, params) {
return "(" + params.map((p) => p.format(format)).join((format === "full") ? ", " : ",") + ")";
}
export class ErrorFragment extends NamedFragment {
constructor(guard, name, inputs) {
super(guard, "error", name, inputs);
Object.defineProperty(this, internal, { value: ErrorFragmentInternal });
}
get selector() {
return id(this.format("sighash")).substring(0, 10);
}
format(format = "sighash") {
if (format === "json") {
return JSON.stringify({
type: "error",
name: this.name,
inputs: this.inputs.map((input) => JSON.parse(input.format(format))),
});
}
const result = [];
if (format !== "sighash") {
result.push("error");
}
result.push(this.name + joinParams(format, this.inputs));
return result.join(" ");
}
static from(obj) {
if (ErrorFragment.isFragment(obj)) {
return obj;
}
if (typeof (obj) === "string") {
return ErrorFragment.from(lex(obj));
}
else if (obj instanceof TokenString) {
const name = consumeName("error", obj);
const inputs = consumeParams(obj);
consumeEoi(obj);
return new ErrorFragment(_guard, name, inputs);
}
return new ErrorFragment(_guard, obj.name, obj.inputs ? obj.inputs.map(ParamType.from) : []);
}
static isFragment(value) {
return (value && value[internal] === ErrorFragmentInternal);
}
}
export class EventFragment extends NamedFragment {
anonymous;
constructor(guard, name, inputs, anonymous) {
super(guard, "event", name, inputs);
Object.defineProperty(this, internal, { value: EventFragmentInternal });
defineProperties(this, { anonymous });
}
get topicHash() {
return id(this.format("sighash"));
}
format(format = "sighash") {
if (format === "json") {
return JSON.stringify({
type: "event",
anonymous: this.anonymous,
name: this.name,
inputs: this.inputs.map((i) => JSON.parse(i.format(format)))
});
}
const result = [];
if (format !== "sighash") {
result.push("event");
}
result.push(this.name + joinParams(format, this.inputs));
if (format !== "sighash" && this.anonymous) {
result.push("anonymous");
}
return result.join(" ");
}
static from(obj) {
if (EventFragment.isFragment(obj)) {
return obj;
}
if (typeof (obj) === "string") {
return EventFragment.from(lex(obj));
}
else if (obj instanceof TokenString) {
const name = consumeName("event", obj);
const inputs = consumeParams(obj, true);
const anonymous = !!consumeKeywords(obj, setify(["anonymous"])).has("anonymous");
consumeEoi(obj);
return new EventFragment(_guard, name, inputs, anonymous);
}
return new EventFragment(_guard, obj.name, obj.inputs ? obj.inputs.map((p) => ParamType.from(p, true)) : [], !!obj.anonymous);
}
static isFragment(value) {
return (value && value[internal] === EventFragmentInternal);
}
}
export class ConstructorFragment extends Fragment {
payable;
gas;
constructor(guard, type, inputs, payable, gas) {
super(guard, type, inputs);
Object.defineProperty(this, internal, { value: ConstructorFragmentInternal });
defineProperties(this, { payable, gas });
}
format(format = "sighash") {
if (format === "sighash") {
throwError("cannot format a constructor for sighash", "UNSUPPORTED_OPERATION", {
operation: "format(sighash)"
});
}
if (format === "json") {
return JSON.stringify({
type: "constructor",
stateMutability: (this.payable ? "payable" : "undefined"),
payable: this.payable,
gas: ((this.gas != null) ? this.gas : undefined),
inputs: this.inputs.map((i) => JSON.parse(i.format(format)))
});
}
const result = [`constructor${joinParams(format, this.inputs)}`];
result.push((this.payable) ? "payable" : "nonpayable");
if (this.gas != null) {
result.push(`@${this.gas.toString()}`);
}
return result.join(" ");
}
static from(obj) {
if (ConstructorFragment.isFragment(obj)) {
return obj;
}
if (typeof (obj) === "string") {
return ConstructorFragment.from(lex(obj));
}
else if (obj instanceof TokenString) {
consumeKeywords(obj, setify(["constructor"]));
const inputs = consumeParams(obj);
const payable = !!consumeKeywords(obj, setify(["payable"])).has("payable");
const gas = consumeGas(obj);
consumeEoi(obj);
return new ConstructorFragment(_guard, "constructor", inputs, payable, gas);
}
return new ConstructorFragment(_guard, "constructor", obj.inputs ? obj.inputs.map(ParamType.from) : [], !!obj.payable, (obj.gas != null) ? obj.gas : null);
}
static isFragment(value) {
return (value && value[internal] === ConstructorFragmentInternal);
}
}
export class FunctionFragment extends NamedFragment {
constant;
outputs;
stateMutability;
payable;
gas;
constructor(guard, name, stateMutability, inputs, outputs, gas) {
super(guard, "function", name, inputs);
Object.defineProperty(this, internal, { value: FunctionFragmentInternal });
outputs = Object.freeze(outputs.slice());
const constant = (stateMutability === "view" || stateMutability === "pure");
const payable = (stateMutability === "payable");
defineProperties(this, { constant, gas, outputs, payable, stateMutability });
}
get selector() {
return id(this.format("sighash")).substring(0, 10);
}
format(format = "sighash") {
if (format === "json") {
return JSON.stringify({
type: "function",
name: this.name,
constant: this.constant,
stateMutability: ((this.stateMutability !== "nonpayable") ? this.stateMutability : undefined),
payable: this.payable,
gas: ((this.gas != null) ? this.gas : undefined),
inputs: this.inputs.map((i) => JSON.parse(i.format(format))),
outputs: this.outputs.map((o) => JSON.parse(o.format(format))),
});
}
const result = [];
if (format !== "sighash") {
result.push("function");
}
result.push(this.name + joinParams(format, this.inputs));
if (format !== "sighash") {
if (this.stateMutability !== "nonpayable") {
result.push(this.stateMutability);
}
if (this.outputs && this.outputs.length) {
result.push("returns");
result.push(joinParams(format, this.outputs));
}
if (this.gas != null) {
result.push(`@${this.gas.toString()}`);
}
}
return result.join(" ");
}
static from(obj) {
if (FunctionFragment.isFragment(obj)) {
return obj;
}
if (typeof (obj) === "string") {
return FunctionFragment.from(lex(obj));
}
else if (obj instanceof TokenString) {
const name = consumeName("function", obj);
const inputs = consumeParams(obj);
const mutability = consumeMutability(obj);
let outputs = [];
if (consumeKeywords(obj, setify(["returns"])).has("returns")) {
outputs = consumeParams(obj);
}
const gas = consumeGas(obj);
consumeEoi(obj);
return new FunctionFragment(_guard, name, mutability, inputs, outputs, gas);
}
// @TODO: verifyState for stateMutability
return new FunctionFragment(_guard, obj.name, obj.stateMutability, obj.inputs ? obj.inputs.map(ParamType.from) : [], obj.outputs ? obj.outputs.map(ParamType.from) : [], (obj.gas != null) ? obj.gas : null);
}
static isFragment(value) {
return (value && value[internal] === FunctionFragmentInternal);
}
}
export class StructFragment extends NamedFragment {
constructor(guard, name, inputs) {
super(guard, "struct", name, inputs);
Object.defineProperty(this, internal, { value: StructFragmentInternal });
}
format() {
throw new Error("@TODO");
}
static from(obj) {
if (typeof (obj) === "string") {
return StructFragment.from(lex(obj));
}
else if (obj instanceof TokenString) {
const name = consumeName("struct", obj);
const inputs = consumeParams(obj);
consumeEoi(obj);
return new StructFragment(_guard, name, inputs);
}
return new StructFragment(_guard, obj.name, obj.inputs ? obj.inputs.map(ParamType.from) : []);
}
static isFragment(value) {
return (value && value[internal] === StructFragmentInternal);
}
}
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