@ethereumjs/evm
Version:
JavaScript Ethereum Virtual Machine (EVM) implementation
66 lines • 2.85 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.precompile0f = precompile0f;
const util_1 = require("@ethereumjs/util");
const errors_ts_1 = require("../errors.js");
const evm_ts_1 = require("../evm.js");
const index_ts_1 = require("./bls12_381/index.js");
const index_ts_2 = require("./index.js");
const util_ts_1 = require("./util.js");
async function precompile0f(opts) {
const pName = (0, index_ts_2.getPrecompileName)('11');
const bls = opts._EVM['_bls'];
const baseGas = opts.common.param('bls12381PairingBaseGas');
// TODO: confirm that this is not a thing for the other precompiles
if (opts.data.length === 0) {
if (opts._debug !== undefined) {
opts._debug(`${pName} failed: Empty input`);
}
return (0, evm_ts_1.EVMErrorResult)(new errors_ts_1.EVMError(errors_ts_1.EVMError.errorMessages.BLS_12_381_INPUT_EMPTY), opts.gasLimit);
}
const gasUsedPerPair = opts.common.param('bls12381PairingPerPairGas');
// TODO: For this precompile it is the only exception that the length check is placed before the
// gas check. I will keep it there to not side-change the existing implementation, but we should
// check (respectively Jochem can maybe have a word) if this is something intended or not
if (!(0, util_ts_1.moduloLengthCheck)(opts, 384, pName)) {
return (0, evm_ts_1.EVMErrorResult)(new errors_ts_1.EVMError(errors_ts_1.EVMError.errorMessages.BLS_12_381_INVALID_INPUT_LENGTH), opts.gasLimit);
}
const gasUsed = baseGas + gasUsedPerPair * BigInt(Math.floor(opts.data.length / 384));
if (!(0, util_ts_1.gasLimitCheck)(opts, gasUsed, pName)) {
return (0, evm_ts_1.OOGResult)(opts.gasLimit);
}
// check for mandatory zero bytes
const zeroByteRanges = [
[0, 16],
[64, 80],
[128, 144],
[192, 208],
[256, 272],
[320, 336],
];
for (let k = 0; k < opts.data.length / 384; k++) {
// zero bytes check
const pairStart = 384 * k;
if (!(0, index_ts_1.leading16ZeroBytesCheck)(opts, zeroByteRanges, pName, pairStart)) {
return (0, evm_ts_1.EVMErrorResult)(new errors_ts_1.EVMError(errors_ts_1.EVMError.errorMessages.BLS_12_381_POINT_NOT_ON_CURVE), opts.gasLimit);
}
}
let returnValue;
try {
returnValue = bls.pairingCheck(opts.data);
}
catch (e) {
if (opts._debug !== undefined) {
opts._debug(`${pName} failed: ${e.message}`);
}
return (0, evm_ts_1.EVMErrorResult)(e, opts.gasLimit);
}
if (opts._debug !== undefined) {
opts._debug(`${pName} return value=${(0, util_1.bytesToHex)(returnValue)}`);
}
return {
executionGasUsed: gasUsed,
returnValue,
};
}
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