@ethereumjs/evm
Version:
JavaScript Ethereum Virtual Machine (EVM) implementation
68 lines • 3.07 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.precompile0c = precompile0c;
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 precompile0c(opts) {
const pName = (0, index_ts_2.getPrecompileName)('0d');
const bls = opts._EVM['_bls'];
const inputData = opts.data;
if (inputData.length === 0) {
if (opts._debug !== undefined) {
opts._debug(`${pName} failed: Empty input`);
}
return (0, evm_ts_1.EVMErrorResult)(new errors_ts_1.EVMError(errors_ts_1.EVMError.errorMessages.BLS_12_381_INPUT_EMPTY), opts.gasLimit); // follow Geth's implementation
}
// TODO: Double-check respectively confirm that this order is really correct that the gas check
// on this eventually to be "floored" pair number should happen before the input length modulo
// validation (same for g2msm)
const numPairs = Math.floor(inputData.length / 160);
const gasUsedPerPair = opts.common.param('bls12381G1MulGas') ?? BigInt(0);
const gasUsed = (0, index_ts_1.msmGasUsed)(numPairs, gasUsedPerPair, index_ts_1.BLS_GAS_DISCOUNT_PAIRS_G1);
if (!(0, util_ts_1.gasLimitCheck)(opts, gasUsed, pName)) {
return (0, evm_ts_1.OOGResult)(opts.gasLimit);
}
if (inputData.length % 160 !== 0) {
if (opts._debug !== undefined) {
opts._debug(`${pName} failed: Invalid input length length=${inputData.length}`);
}
return (0, evm_ts_1.EVMErrorResult)(new errors_ts_1.EVMError(errors_ts_1.EVMError.errorMessages.BLS_12_381_INVALID_INPUT_LENGTH), opts.gasLimit);
}
if (!(0, util_ts_1.moduloLengthCheck)(opts, 160, pName)) {
return (0, evm_ts_1.EVMErrorResult)(new errors_ts_1.EVMError(errors_ts_1.EVMError.errorMessages.BLS_12_381_INVALID_INPUT_LENGTH), opts.gasLimit);
}
// prepare pairing list and check for mandatory zero bytes
const zeroByteRanges = [
[0, 16],
[64, 80],
];
for (let k = 0; k < numPairs; k++) {
// zero bytes check
const pairStart = 160 * k;
if (!(0, index_ts_1.leading16ZeroBytesCheck)(opts, zeroByteRanges, pName, pairStart)) {
return (0, evm_ts_1.EVMErrorResult)(new errors_ts_1.EVMError(errors_ts_1.EVMError.errorMessages.BLS_12_381_POINT_NOT_ON_CURVE), opts.gasLimit);
}
}
let returnValue;
try {
returnValue = bls.msmG1(opts.data);
}
catch (e) {
if (opts._debug !== undefined) {
opts._debug(`${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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