NameHash.smali

.class public Lorg/web3j/ens/NameHash;
.super Ljava/lang/Object;
.source "NameHash.java"


# static fields
.field private static final EMPTY:[B


# direct methods
.method static constructor <clinit>()V
    .registers 1

    .prologue
    .line 15
    const/16 v0, 0x20

    new-array v0, v0, [B

    sput-object v0, Lorg/web3j/ens/NameHash;->EMPTY:[B

    return-void
.end method

.method public constructor <init>()V
    .registers 1

    .prologue
    .line 13
    invoke-direct {p0}, Ljava/lang/Object;-><init>()V

    return-void
.end method

.method public static nameHash(Ljava/lang/String;)Ljava/lang/String;
    .registers 3

    .prologue
    .line 18
    invoke-static {p0}, Lorg/web3j/ens/NameHash;->normalise(Ljava/lang/String;)Ljava/lang/String;

    move-result-object v0

    .line 19
    const-string v1, "\\."

    invoke-virtual {v0, v1}, Ljava/lang/String;->split(Ljava/lang/String;)[Ljava/lang/String;

    move-result-object v0

    invoke-static {v0}, Lorg/web3j/ens/NameHash;->nameHash([Ljava/lang/String;)[B

    move-result-object v0

    invoke-static {v0}, Lorg/web3j/utils/Numeric;->toHexString([B)Ljava/lang/String;

    move-result-object v0

    return-object v0
.end method

.method private static nameHash([Ljava/lang/String;)[B
    .registers 6

    .prologue
    const/4 v2, 0x1

    const/4 v4, 0x0

    .line 23
    array-length v0, p0

    if-eqz v0, :cond_f

    aget-object v0, p0, v4

    const-string v1, ""

    invoke-virtual {v0, v1}, Ljava/lang/String;->equals(Ljava/lang/Object;)Z

    move-result v0

    if-eqz v0, :cond_12

    .line 24
    :cond_f
    sget-object v0, Lorg/web3j/ens/NameHash;->EMPTY:[B

    .line 39
    :goto_11
    return-object v0

    .line 27
    :cond_12
    array-length v0, p0

    if-ne v0, v2, :cond_38

    .line 28
    new-array v0, v4, [Ljava/lang/String;

    .line 33
    :goto_17
    invoke-static {v0}, Lorg/web3j/ens/NameHash;->nameHash([Ljava/lang/String;)[B

    move-result-object v0

    .line 34
    const/16 v1, 0x40

    invoke-static {v0, v1}, Ljava/util/Arrays;->copyOf([BI)[B

    move-result-object v0

    .line 36
    aget-object v1, p0, v4

    sget-object v2, Ljava/nio/charset/StandardCharsets;->UTF_8:Ljava/nio/charset/Charset;

    invoke-virtual {v1, v2}, Ljava/lang/String;->getBytes(Ljava/nio/charset/Charset;)[B

    move-result-object v1

    invoke-static {v1}, Lorg/web3j/crypto/Hash;->sha3([B)[B

    move-result-object v1

    .line 37
    const/16 v2, 0x20

    array-length v3, v1

    invoke-static {v1, v4, v0, v2, v3}, Ljava/lang/System;->arraycopy(Ljava/lang/Object;ILjava/lang/Object;II)V

    .line 39
    invoke-static {v0}, Lorg/web3j/crypto/Hash;->sha3([B)[B

    move-result-object v0

    goto :goto_11

    .line 30
    :cond_38
    array-length v0, p0

    invoke-static {p0, v2, v0}, Ljava/util/Arrays;->copyOfRange([Ljava/lang/Object;II)[Ljava/lang/Object;

    move-result-object v0

    check-cast v0, [Ljava/lang/String;

    goto :goto_17
.end method

.method static normalise(Ljava/lang/String;)Ljava/lang/String;
    .registers 4

    .prologue
    .line 53
    const/4 v0, 0x2

    :try_start_1
    invoke-static {p0, v0}, Ljava/net/IDN;->toASCII(Ljava/lang/String;I)Ljava/lang/String;

    move-result-object v0

    invoke-virtual {v0}, Ljava/lang/String;->toLowerCase()Ljava/lang/String;
    :try_end_8
    .catch Ljava/lang/IllegalArgumentException; {:try_start_1 .. :try_end_8} :catch_a
    .catch Ljava/lang/StringIndexOutOfBoundsException; {:try_start_1 .. :try_end_8} :catch_20

    move-result-object v0

    return-object v0

    .line 56
    :catch_a
    move-exception v0

    new-instance v0, Lorg/web3j/ens/EnsResolutionException;

    new-instance v1, Ljava/lang/StringBuilder;

    const-string v2, "Invalid ENS name provided: "

    invoke-direct {v1, v2}, Ljava/lang/StringBuilder;-><init>(Ljava/lang/String;)V

    invoke-virtual {v1, p0}, Ljava/lang/StringBuilder;->append(Ljava/lang/String;)Ljava/lang/StringBuilder;

    move-result-object v1

    invoke-virtual {v1}, Ljava/lang/StringBuilder;->toString()Ljava/lang/String;

    move-result-object v1

    invoke-direct {v0, v1}, Lorg/web3j/ens/EnsResolutionException;-><init>(Ljava/lang/String;)V

    throw v0

    .line 59
    :catch_20
    move-exception v0

    new-instance v0, Lorg/web3j/ens/EnsResolutionException;

    new-instance v1, Ljava/lang/StringBuilder;

    const-string v2, "Invalid ENS name provided: "

    invoke-direct {v1, v2}, Ljava/lang/StringBuilder;-><init>(Ljava/lang/String;)V

    invoke-virtual {v1, p0}, Ljava/lang/StringBuilder;->append(Ljava/lang/String;)Ljava/lang/StringBuilder;

    move-result-object v1

    invoke-virtual {v1}, Ljava/lang/StringBuilder;->toString()Ljava/lang/String;

    move-result-object v1

    invoke-direct {v0, v1}, Lorg/web3j/ens/EnsResolutionException;-><init>(Ljava/lang/String;)V

    throw v0
.end method