@ethereumjs/evm/dist/esm/precompiles/0b-bls12-g1add.js

JavaScript Ethereum Virtual Machine (EVM) implementation

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 precompile0b(opts) {
    const pName = getPrecompileName('0b');
    const bls = opts._EVM['_bls'];
    // note: the gas used is constant; even if the input is incorrect.
    const gasUsed = opts.common.param('bls12381G1AddGas');
    if (!gasLimitCheck(opts, gasUsed, pName)) {
        return OOGResult(opts.gasLimit);
    }
    if (!equalityLengthCheck(opts, 256, 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],
    ];
    if (!leading16ZeroBytesCheck(opts, zeroByteRanges, pName)) {
        return EVMErrorResult(new EVMError(EVMError.errorMessages.BLS_12_381_POINT_NOT_ON_CURVE), opts.gasLimit);
    }
    let returnValue;
    try {
        returnValue = bls.addG1(opts.data);
    }
    catch (e) {
        if (opts._debug !== undefined) {
            opts._debug(`${pName} failed: ${e.message}`);
        }
        return EVMErrorResult(e, opts.gasLimit);
    }
    if (opts._debug !== undefined) {
        opts._debug(`${pName} return value=${bytesToHex(returnValue)}`);
    }
    return {
        executionGasUsed: gasUsed,
        returnValue,
    };
}
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