@ethereumjs/evm
Version:
JavaScript Ethereum Virtual Machine (EVM) implementation
57 lines • 1.63 kB
JavaScript
import { short } from '@ethereumjs/util';
/**
* Checks that the gas used remain under the gas limit.
*
* @param opts
* @param gasUsed
* @param pName
* @returns
*/
export const gasLimitCheck = (opts, gasUsed, pName) => {
if (opts._debug !== undefined) {
opts._debug(`Run ${pName} precompile data=${short(opts.data)} length=${opts.data.length} gasLimit=${opts.gasLimit} gasUsed=${gasUsed}`);
}
if (opts.gasLimit < gasUsed) {
if (opts._debug !== undefined) {
opts._debug(`${pName} failed: OOG`);
}
return false;
}
return true;
};
/**
* Checks that the length of the provided data is equal to `length`.
*
* @param opts
* @param length
* @param pName
* @returns
*/
export const equalityLengthCheck = (opts, length, pName) => {
if (opts.data.length !== length) {
if (opts._debug !== undefined) {
opts._debug(`${pName} failed: Invalid input length length=${opts.data.length} (expected: ${length})`);
}
return false;
}
return true;
};
/**
* Checks that the total length of the provided data input can be subdivided into k equal parts
* with `length` (without leaving some remainder bytes).
*
* @param opts
* @param length
* @param pName
* @returns
*/
export const moduloLengthCheck = (opts, length, pName) => {
if (opts.data.length % length !== 0) {
if (opts._debug !== undefined) {
opts._debug(`${pName} failed: Invalid input length length=${opts.data.length} (expected: ${length}*k bytes)`);
}
return false;
}
return true;
};
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