76 lines
3.2 KiB
JavaScript
76 lines
3.2 KiB
JavaScript
// See: https://github.com/ethereum/wiki/wiki/Ethereum-Contract-ABI
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import { assertArgumentCount, throwArgumentError } from "../utils/index.js";
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import { Reader, Writer } from "./coders/abstract-coder.js";
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import { AddressCoder } from "./coders/address.js";
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import { ArrayCoder } from "./coders/array.js";
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import { BooleanCoder } from "./coders/boolean.js";
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import { BytesCoder } from "./coders/bytes.js";
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import { FixedBytesCoder } from "./coders/fixed-bytes.js";
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import { NullCoder } from "./coders/null.js";
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import { NumberCoder } from "./coders/number.js";
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import { StringCoder } from "./coders/string.js";
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import { TupleCoder } from "./coders/tuple.js";
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import { ParamType } from "./fragments.js";
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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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#getCoder(param) {
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if (param.isArray()) {
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return new ArrayCoder(this.#getCoder(param.arrayChildren), param.arrayLength, param.name);
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}
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if (param.isTuple()) {
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return new TupleCoder(param.components.map((c) => this.#getCoder(c)), param.name);
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}
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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 "":
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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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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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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 throwArgumentError("invalid type", "type", param.type);
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}
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getDefaultValue(types) {
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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.defaultValue();
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}
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encode(types, values) {
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assertArgumentCount(values.length, types.length, "types/values length mismatch");
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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 = new Writer();
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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, loose) {
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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(new Reader(data, loose));
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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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