92 lines
3.8 KiB
JavaScript
92 lines
3.8 KiB
JavaScript
"use strict";
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// See: https://github.com/ethereum/wiki/wiki/Ethereum-Contract-ABI
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import { arrayify } from "@ethersproject/bytes";
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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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import { Reader, Writer } from "./coders/abstract-coder";
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import { AddressCoder } from "./coders/address";
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import { ArrayCoder } from "./coders/array";
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import { BooleanCoder } from "./coders/boolean";
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import { BytesCoder } from "./coders/bytes";
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import { FixedBytesCoder } from "./coders/fixed-bytes";
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import { NullCoder } from "./coders/null";
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import { NumberCoder } from "./coders/number";
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import { StringCoder } from "./coders/string";
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import { TupleCoder } from "./coders/tuple";
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import { ParamType } from "./fragments";
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const paramTypeBytes = new RegExp(/^bytes([0-9]*)$/);
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const paramTypeNumber = new RegExp(/^(u?int)([0-9]*)$/);
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export class AbiCoder {
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constructor(coerceFunc) {
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logger.checkNew(new.target, AbiCoder);
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defineReadOnly(this, "coerceFunc", coerceFunc || null);
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}
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_getCoder(param) {
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switch (param.baseType) {
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case "address":
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return new AddressCoder(param.name);
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case "bool":
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return new BooleanCoder(param.name);
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case "string":
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return new StringCoder(param.name);
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case "bytes":
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return new BytesCoder(param.name);
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case "array":
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return new ArrayCoder(this._getCoder(param.arrayChildren), param.arrayLength, param.name);
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case "tuple":
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return new TupleCoder((param.components || []).map((component) => {
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return this._getCoder(component);
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}), param.name);
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case "":
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return new NullCoder(param.name);
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}
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// u?int[0-9]*
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let match = param.type.match(paramTypeNumber);
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if (match) {
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let size = parseInt(match[2] || "256");
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if (size === 0 || size > 256 || (size % 8) !== 0) {
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logger.throwArgumentError("invalid " + match[1] + " bit length", "param", param);
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}
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return new NumberCoder(size / 8, (match[1] === "int"), param.name);
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}
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// bytes[0-9]+
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match = param.type.match(paramTypeBytes);
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if (match) {
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let size = parseInt(match[1]);
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if (size === 0 || size > 32) {
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logger.throwArgumentError("invalid bytes length", "param", param);
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}
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return new FixedBytesCoder(size, param.name);
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}
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return logger.throwArgumentError("invalid type", "type", param.type);
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}
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_getWordSize() { return 32; }
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_getReader(data) {
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return new Reader(data, this._getWordSize(), this.coerceFunc);
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}
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_getWriter() {
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return new Writer(this._getWordSize());
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}
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encode(types, values) {
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if (types.length !== values.length) {
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logger.throwError("types/values length mismatch", Logger.errors.INVALID_ARGUMENT, {
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count: { types: types.length, values: values.length },
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value: { types: types, values: values }
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});
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}
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const coders = types.map((type) => this._getCoder(ParamType.from(type)));
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const coder = (new TupleCoder(coders, "_"));
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const writer = this._getWriter();
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coder.encode(writer, values);
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return writer.data;
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}
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decode(types, data) {
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const coders = types.map((type) => this._getCoder(ParamType.from(type)));
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const coder = new TupleCoder(coders, "_");
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return coder.decode(this._getReader(arrayify(data)));
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}
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}
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export const defaultAbiCoder = new AbiCoder();
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//# sourceMappingURL=abi-coder.js.map
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