com.nftco.flow.sdk.extensions.kt Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of flow-jvm-sdk Show documentation

The Flow Blockchain JVM SDK

The newest version!

package com.nftco.flow.sdk

import com.google.common.io.BaseEncoding
import com.google.protobuf.Timestamp
import java.security.MessageDigest
import java.time.LocalDateTime
import java.time.ZoneOffset

fun ByteArray.bytesToHex(): String = BaseEncoding.base16().lowerCase().encode(this)

fun String.hexToBytes(): ByteArray = BaseEncoding.base16().lowerCase().decode(
    if (this.lowercase().startsWith("0x")) {
        this.substring(2)
    } else {
        this
    }
)

fun Timestamp.asLocalDateTime(): LocalDateTime = LocalDateTime.ofEpochSecond(this.seconds, this.nanos, ZoneOffset.UTC)

fun LocalDateTime.asTimestamp(): Timestamp = Timestamp.newBuilder()
    .setSeconds(this.toEpochSecond(ZoneOffset.UTC))
    .setNanos(this.nano)
    .build()

fun ByteArray.sha3256Hash(): ByteArray = MessageDigest.getInstance("SHA3-256", "BC").digest(this)

fun ByteArray.sha2256Hash(): ByteArray = MessageDigest.getInstance("SHA2-256", "BC").digest(this)

fun fixedSize(bytes: ByteArray, size: Int): ByteArray {
    if (bytes.size > size) {
        throw IllegalArgumentException("must have no more than $size bytes long")
    }
    return if (bytes.size < size) {
        ByteArray(size - bytes.size) + bytes
    } else {
        bytes
    }
}