118 lines
3.9 KiB
TypeScript
118 lines
3.9 KiB
TypeScript
import { getAddress } from "../address/index.js";
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import {
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keccak256 as _keccak256, sha256 as _sha256
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} from "../crypto/index.js";
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import {
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concat, dataLength, getBytes, hexlify, toBeArray, toTwos, toUtf8Bytes, zeroPadBytes, zeroPadValue,
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assertArgument
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} from "../utils/index.js";
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const regexBytes = new RegExp("^bytes([0-9]+)$");
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const regexNumber = new RegExp("^(u?int)([0-9]*)$");
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const regexArray = new RegExp("^(.*)\\[([0-9]*)\\]$");
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function _pack(type: string, value: any, isArray?: boolean): Uint8Array {
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switch(type) {
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case "address":
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if (isArray) { return getBytes(zeroPadValue(value, 32)); }
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return getBytes(getAddress(value));
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case "string":
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return toUtf8Bytes(value);
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case "bytes":
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return getBytes(value);
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case "bool":
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value = (!!value ? "0x01": "0x00");
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if (isArray) { return getBytes(zeroPadValue(value, 32)); }
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return getBytes(value);
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}
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let match = type.match(regexNumber);
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if (match) {
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let signed = (match[1] === "int");
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let size = parseInt(match[2] || "256")
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assertArgument((!match[2] || match[2] === String(size)) && (size % 8 === 0) && size !== 0 && size <= 256, "invalid number type", "type", type);
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if (isArray) { size = 256; }
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if (signed) { value = toTwos(value, size); }
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return getBytes(zeroPadValue(toBeArray(value), size / 8));
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}
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match = type.match(regexBytes);
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if (match) {
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const size = parseInt(match[1]);
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assertArgument(String(size) === match[1] && size !== 0 && size <= 32, "invalid bytes type", "type", type);
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assertArgument(dataLength(value) === size, `invalid value for ${ type }`, "value", value);
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if (isArray) { return getBytes(zeroPadBytes(value, 32)); }
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return value;
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}
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match = type.match(regexArray);
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if (match && Array.isArray(value)) {
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const baseType = match[1];
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const count = parseInt(match[2] || String(value.length));
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assertArgument(count === value.length, `invalid array length for ${ type }`, "value", value);
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const result: Array<Uint8Array> = [];
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value.forEach(function(value) {
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result.push(_pack(baseType, value, true));
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});
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return getBytes(concat(result));
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}
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assertArgument(false, "invalid type", "type", type)
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}
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// @TODO: Array Enum
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/**
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* Computes the [[link-solc-packed]] representation of %%values%%
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* respectively to their %%types%%.
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*
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* @example:
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* addr = "0x8ba1f109551bd432803012645ac136ddd64dba72"
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* solidityPacked([ "address", "uint" ], [ addr, 45 ]);
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* //_result:
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*/
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export function solidityPacked(types: ReadonlyArray<string>, values: ReadonlyArray<any>): string {
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assertArgument(types.length === values.length, "wrong number of values; expected ${ types.length }", "values", values);
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const tight: Array<Uint8Array> = [];
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types.forEach(function(type, index) {
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tight.push(_pack(type, values[index]));
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});
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return hexlify(concat(tight));
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}
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/**
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* Computes the [[link-solc-packed]] [[keccak256]] hash of %%values%%
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* respectively to their %%types%%.
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*
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* @example:
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* addr = "0x8ba1f109551bd432803012645ac136ddd64dba72"
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* solidityPackedKeccak256([ "address", "uint" ], [ addr, 45 ]);
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* //_result:
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*/
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export function solidityPackedKeccak256(types: ReadonlyArray<string>, values: ReadonlyArray<any>): string {
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return _keccak256(solidityPacked(types, values));
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}
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/**
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* Computes the [[link-solc-packed]] [[sha256]] hash of %%values%%
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* respectively to their %%types%%.
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*
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* @example:
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* addr = "0x8ba1f109551bd432803012645ac136ddd64dba72"
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* solidityPackedSha256([ "address", "uint" ], [ addr, 45 ]);
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* //_result:
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*/
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export function solidityPackedSha256(types: ReadonlyArray<string>, values: ReadonlyArray<any>): string {
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return _sha256(solidityPacked(types, values));
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}
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