@massalabs/massa-web3
Version:
massa's web3 sdk client
49 lines • 1.57 kB
JavaScript
import { numberToInteger, integerFromByte, integerToByte } from './integers';
export const SIZE_BYTE = 32;
export const SIZE_BIT = 256;
export const MIN = -(1n << (BigInt(SIZE_BIT) - 1n));
export const MAX = (1n << (BigInt(SIZE_BIT) - 1n)) - 1n;
/**
* Converts an I256 value to bytes
*
* @param value - The number to convert
* @returns The bytes representation of the number
* @throws if the value is out of range for I256
*/
export function toBytes(value) {
return integerToByte(SIZE_BIT, value, true);
}
/**
* Converts bytes to an I256 value
*
* @remarks
* Silently ignores bytes that are not needed to represent the I256 value.
*
* @param bytes - The bytes to convert
* @returns The I256 representation of the bytes
*/
export function fromBytes(bytes) {
return integerFromByte(SIZE_BIT, bytes, true);
}
/**
* Converts an I256 value to a number
* @param buffer - The buffer to read from
* @param offset - The optional offset in the buffer at which to start reading the I256 value (default: 0)
* @returns The I256 representation of the bytes
*/
export function fromBuffer(buffer, offset) {
const value = integerFromByte(SIZE_BIT, buffer, true, offset);
offset += SIZE_BYTE;
return { value, offset };
}
/**
* Converts a number to an I256 value
*
* @param value - The number to convert
* @returns The I256 representation of the number
* @throws if the value is not a safe integer or out of range for I256
*/
export function fromNumber(value) {
return numberToInteger(SIZE_BIT, value, true);
}
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