@ethereumjs/evm
Version:
JavaScript Ethereum Virtual Machine (EVM) implementation
48 lines • 1.71 kB
JavaScript
import { bytesToHex } from '@ethereumjs/util';
import { EVMError } from "../errors.js";
import { EVMErrorResult, OOGResult } from "../evm.js";
import { leading16ZeroBytesCheck } from "./bls12_381/index.js";
import { getPrecompileName } from "./index.js";
import { equalityLengthCheck, gasLimitCheck } from "./util.js";
export async function precompile0d(opts) {
const pName = getPrecompileName('0e');
const bls = opts._EVM['_bls'];
// note: the gas used is constant; even if the input is incorrect.
const gasUsed = opts.common.param('bls12381G2AddGas') ?? BigInt(0);
if (!gasLimitCheck(opts, gasUsed, pName)) {
return OOGResult(opts.gasLimit);
}
if (!equalityLengthCheck(opts, 512, pName)) {
return EVMErrorResult(new EVMError(EVMError.errorMessages.BLS_12_381_INVALID_INPUT_LENGTH), opts.gasLimit);
}
// check if some parts of input are zero bytes.
const zeroByteRanges = [
[0, 16],
[64, 80],
[128, 144],
[192, 208],
[256, 272],
[320, 336],
[384, 400],
[448, 464],
];
if (!leading16ZeroBytesCheck(opts, zeroByteRanges, pName)) {
return EVMErrorResult(new EVMError(EVMError.errorMessages.BLS_12_381_POINT_NOT_ON_CURVE), opts.gasLimit);
}
// TODO: verify that point is on G2
let returnValue;
try {
returnValue = bls.addG2(opts.data);
}
catch (e) {
return EVMErrorResult(e, opts.gasLimit);
}
if (opts._debug !== undefined) {
opts._debug(`${pName} return value=${bytesToHex(returnValue)}`);
}
return {
executionGasUsed: gasUsed,
returnValue,
};
}
//# sourceMappingURL=0d-bls12-g2add.js.map