@polygon-hermez/vm/dist/evm/precompiles/04-identity.js

An Ethereum VM implementation

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
const ethereumjs_util_1 = require("ethereumjs-util");
const evm_1 = require("../evm");
const assert = require('assert');
function default_1(opts) {
    assert(opts.data);
    const data = opts.data;
    const gasUsed = new ethereumjs_util_1.BN(opts._common.param('gasPrices', 'identity'));
    gasUsed.iadd(new ethereumjs_util_1.BN(opts._common.param('gasPrices', 'identityWord')).imuln(Math.ceil(data.length / 32)));
    if (opts.gasLimit.lt(gasUsed)) {
        return (0, evm_1.OOGResult)(opts.gasLimit);
    }
    // Reduce counters
    opts._VM.vcm.computeFunctionCounters('preIdentity', {
        calldataLength: data.length,
        returnDataLength: opts.outLength.toNumber(),
    });
    return {
        gasUsed,
        returnValue: data,
    };
}
exports.default = default_1;
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