@tevm/voltaire

@tevm/voltaire / crypto/Keccak256

crypto/Keccak256

Variables

DIGEST_SIZE

const DIGEST_SIZE: number = 32

Defined in: src/crypto/Keccak256/constants.js:13 Digest size in bytes (32 bytes = 256 bits)

Since

0.0.0

Keccak256

const Keccak256: (input) => Keccak256Hash & object = Keccak256Hash

Defined in: src/crypto/Keccak256/Keccak256.js:82

Type Declaration

contractAddress()

contractAddress: (sender, nonce) => Uint8Array<ArrayBufferLike>

Compute contract address from deployer and nonce Uses CREATE formula: keccak256(rlp([sender, nonce]))[12:]

Parameters

sender

Uint8Array<ArrayBufferLike> Deployer address (20 bytes)

nonce

bigint Transaction nonce

Returns

Uint8Array<ArrayBufferLike> Contract address (20 bytes)

See

https://voltaire.tevm.sh/crypto for crypto documentation

Since

0.0.0

Throws

If sender is not 20 bytes

Example

import * as Keccak256 from './crypto/Keccak256/index.js';
const sender = new Uint8Array(20);
const address = Keccak256.contractAddress(sender, 0n);

create2Address()

create2Address: (sender, salt, initCodeHash) => Uint8Array<ArrayBufferLike>

Compute CREATE2 address Uses CREATE2 formula: keccak256(0xff ++ sender ++ salt ++ keccak256(init_code))[12:]

Parameters

sender

Uint8Array<ArrayBufferLike> Deployer address (20 bytes)

salt

Uint8Array<ArrayBufferLike> 32-byte salt

initCodeHash

Uint8Array<ArrayBufferLike> Hash of initialization code

Returns

Uint8Array<ArrayBufferLike> Contract address (20 bytes)

See

https://voltaire.tevm.sh/crypto for crypto documentation

Since

0.0.0

Throws

If sender is not 20 bytes

Throws

If salt is not 32 bytes

Throws

If initCodeHash is not 32 bytes

Example

import * as Keccak256 from './crypto/Keccak256/index.js';
const sender = new Uint8Array(20);
const salt = new Uint8Array(32);
const initCodeHash = new Uint8Array(32);
const address = Keccak256.create2Address(sender, salt, initCodeHash);

DIGEST_SIZE

DIGEST_SIZE: number

Digest size in bytes (32 bytes = 256 bits)

Since

0.0.0

from()

from: (input) => Keccak256Hash

Hash input with Keccak-256 (constructor pattern) Auto-detects input type and hashes accordingly:

Uint8Array: hash directly
string starting with 0x: parse as hex
string: UTF-8 encode then hash

Parameters

input

Data to hash string | Uint8Array<ArrayBufferLike>

Returns

Keccak256Hash 32-byte hash

See

https://voltaire.tevm.sh/crypto/keccak256 for crypto documentation

Since

0.0.0

Throws

If hex string is invalid

Example

import { Keccak256Hash } from './crypto/Keccak256/index.js';

const hash1 = Keccak256Hash.from("0x1234");      // Hex
const hash2 = Keccak256Hash.from("hello");       // String
const hash3 = Keccak256Hash.from(uint8array);    // Bytes

fromHex()

fromHex: (hex) => Keccak256Hash = hashHex

Hash hex string with Keccak-256

Parameters

hex

string Hex string to hash (with or without 0x prefix)

Returns

Keccak256Hash 32-byte hash

See

https://voltaire.tevm.sh/crypto for crypto documentation

Since

0.0.0

Throws

If hex string is invalid or has odd length

Example

import { Keccak256Hash } from './crypto/Keccak256/index.js';
const hash = Keccak256Hash.fromHex('0x1234abcd');

fromString()

fromString: (str) => Keccak256Hash = hashString

Hash string with Keccak-256 String is UTF-8 encoded before hashing.

Parameters

str

string String to hash

Returns

Keccak256Hash 32-byte hash

See

https://voltaire.tevm.sh/crypto for crypto documentation

Since

0.0.0

Throws

Example

import { Keccak256Hash } from './crypto/Keccak256/index.js';
const hash = Keccak256Hash.fromString('hello');

fromTopic()

fromTopic: (signature) => Keccak256Hash = topic

Compute event topic (32-byte Keccak-256 hash) Used for Ethereum event signatures.

Parameters

signature

string Event signature string

Returns

Keccak256Hash 32-byte topic

See

https://voltaire.tevm.sh/crypto for crypto documentation

Since

0.0.0

Throws

Example

import { Keccak256Hash } from './crypto/Keccak256/index.js';
const topic = Keccak256Hash.fromTopic('Transfer(address,address,uint256)');

hash()

hash: (data) => Keccak256Hash

Hash data with Keccak-256

Parameters

data

Uint8Array<ArrayBufferLike> Data to hash

Returns

Keccak256Hash 32-byte hash

See

https://voltaire.tevm.sh/crypto for crypto documentation

Since

0.0.0

Throws

Example

import { Keccak256Hash } from './crypto/Keccak256/index.js';
const hash = Keccak256Hash.from(data);

hashHex()

hashHex: (hex) => Keccak256Hash

Hash hex string with Keccak-256

Parameters

hex

string Hex string to hash (with or without 0x prefix)

Returns

Keccak256Hash 32-byte hash

See

https://voltaire.tevm.sh/crypto for crypto documentation

Since

0.0.0

Throws

If hex string is invalid or has odd length

Example

import { Keccak256Hash } from './crypto/Keccak256/index.js';
const hash = Keccak256Hash.fromHex('0x1234abcd');

hashMultiple()

hashMultiple: (chunks) => Keccak256Hash

Hash multiple data chunks in sequence Equivalent to hashing the concatenation of all chunks.

Parameters

chunks

readonly Uint8Array<ArrayBufferLike>[] Array of data chunks to hash

Returns

Keccak256Hash 32-byte hash

See

https://voltaire.tevm.sh/crypto for crypto documentation

Since

0.0.0

Throws

Example

import { Keccak256Hash } from './crypto/Keccak256/index.js';
const hash = Keccak256Hash.from(combined);

hashString()

hashString: (str) => Keccak256Hash

Hash string with Keccak-256 String is UTF-8 encoded before hashing.

Parameters

str

string String to hash

Returns

Keccak256Hash 32-byte hash

See

https://voltaire.tevm.sh/crypto for crypto documentation

Since

0.0.0

Throws

Example

import { Keccak256Hash } from './crypto/Keccak256/index.js';
const hash = Keccak256Hash.fromString('hello');

RATE

RATE: number

Rate in bytes for Keccak256 (136 bytes = 1088 bits)

Since

0.0.0

selector()

selector: (signature) => Uint8Array<ArrayBufferLike>

Compute function selector (first 4 bytes of Keccak-256 hash) Used for Ethereum function signatures.

Parameters

signature

string Function signature string

Returns

Uint8Array<ArrayBufferLike> 4-byte selector

See

https://voltaire.tevm.sh/crypto for crypto documentation

Since

0.0.0

Throws

Example

import * as Keccak256 from './crypto/Keccak256/index.js';
const selector = Keccak256.selector('transfer(address,uint256)');
// Uint8Array(4) [0xa9, 0x05, 0x9c, 0xbb]

STATE_SIZE

STATE_SIZE: number

State size (25 u64 words = 1600 bits)

Since

0.0.0

topic()

topic: (signature) => Keccak256Hash

Compute event topic (32-byte Keccak-256 hash) Used for Ethereum event signatures.

Parameters

signature

string Event signature string

Returns

Keccak256Hash 32-byte topic

See

https://voltaire.tevm.sh/crypto for crypto documentation

Since

0.0.0

Throws

Example

import { Keccak256Hash } from './crypto/Keccak256/index.js';
const topic = Keccak256Hash.fromTopic('Transfer(address,address,uint256)');

Deprecated

Use Keccak256Hash instead Keccak256 alias maintained for backward compatibility

RATE

const RATE: number = 136

Defined in: src/crypto/Keccak256/constants.js:20 Rate in bytes for Keccak256 (136 bytes = 1088 bits)

Since

0.0.0

STATE_SIZE

const STATE_SIZE: number = 25

Defined in: src/crypto/Keccak256/constants.js:27 State size (25 u64 words = 1600 bits)

Since

0.0.0

Functions

contractAddress()

contractAddress(sender, nonce): Uint8Array<ArrayBufferLike>

Defined in: src/crypto/Keccak256/contractAddress.js:40 Compute contract address from deployer and nonce Uses CREATE formula: keccak256(rlp([sender, nonce]))[12:]

Parameters

sender

Uint8Array<ArrayBufferLike> Deployer address (20 bytes)

nonce

bigint Transaction nonce

Returns

Uint8Array<ArrayBufferLike> Contract address (20 bytes)

See

https://voltaire.tevm.sh/crypto for crypto documentation

Since

0.0.0

Throws

If sender is not 20 bytes

Example

import * as Keccak256 from './crypto/Keccak256/index.js';
const sender = new Uint8Array(20);
const address = Keccak256.contractAddress(sender, 0n);

create2Address()

create2Address(sender, salt, initCodeHash): Uint8Array<ArrayBufferLike>

Defined in: src/crypto/Keccak256/create2Address.js:27 Compute CREATE2 address Uses CREATE2 formula: keccak256(0xff ++ sender ++ salt ++ keccak256(init_code))[12:]

Parameters

sender

Uint8Array<ArrayBufferLike> Deployer address (20 bytes)

salt

Uint8Array<ArrayBufferLike> 32-byte salt

initCodeHash

Uint8Array<ArrayBufferLike> Hash of initialization code

Returns

Uint8Array<ArrayBufferLike> Contract address (20 bytes)

See

https://voltaire.tevm.sh/crypto for crypto documentation

Since

0.0.0

Throws

If sender is not 20 bytes

Throws

If salt is not 32 bytes

Throws

If initCodeHash is not 32 bytes

Example

import * as Keccak256 from './crypto/Keccak256/index.js';
const sender = new Uint8Array(20);
const salt = new Uint8Array(32);
const initCodeHash = new Uint8Array(32);
const address = Keccak256.create2Address(sender, salt, initCodeHash);

from()

from(input): Keccak256Hash

Defined in: src/crypto/Keccak256/from.js:27 Hash input with Keccak-256 (constructor pattern) Auto-detects input type and hashes accordingly:

Uint8Array: hash directly
string starting with 0x: parse as hex
string: UTF-8 encode then hash

Parameters

input

Data to hash string | Uint8Array<ArrayBufferLike>

Returns

Keccak256Hash 32-byte hash

See

https://voltaire.tevm.sh/crypto/keccak256 for crypto documentation

Since

0.0.0

Throws

If hex string is invalid

Example

import { Keccak256Hash } from './crypto/Keccak256/index.js';

const hash1 = Keccak256Hash.from("0x1234");      // Hex
const hash2 = Keccak256Hash.from("hello");       // String
const hash3 = Keccak256Hash.from(uint8array);    // Bytes

hash()

hash(data): Keccak256Hash

Defined in: src/crypto/Keccak256/hash.js:17 Hash data with Keccak-256

Parameters

data

Uint8Array<ArrayBufferLike> Data to hash

Returns

Keccak256Hash 32-byte hash

See

https://voltaire.tevm.sh/crypto for crypto documentation

Since

0.0.0

Throws

Example

import { Keccak256Hash } from './crypto/Keccak256/index.js';
const hash = Keccak256Hash.from(data);

hashHex()

hashHex(hex): Keccak256Hash

Defined in: src/crypto/Keccak256/hashHex.js:18 Hash hex string with Keccak-256

Parameters

hex

string Hex string to hash (with or without 0x prefix)

Returns

Keccak256Hash 32-byte hash

See

https://voltaire.tevm.sh/crypto for crypto documentation

Since

0.0.0

Throws

If hex string is invalid or has odd length

Example

import { Keccak256Hash } from './crypto/Keccak256/index.js';
const hash = Keccak256Hash.fromHex('0x1234abcd');

hashMultiple()

hashMultiple(chunks): Keccak256Hash

Defined in: src/crypto/Keccak256/hashMultiple.js:19 Hash multiple data chunks in sequence Equivalent to hashing the concatenation of all chunks.

Parameters

chunks

readonly Uint8Array<ArrayBufferLike>[] Array of data chunks to hash

Returns

Keccak256Hash 32-byte hash

See

https://voltaire.tevm.sh/crypto for crypto documentation

Since

0.0.0

Throws

Example

import { Keccak256Hash } from './crypto/Keccak256/index.js';
const hash = Keccak256Hash.from(combined);

hashString()

hashString(str): Keccak256Hash

Defined in: src/crypto/Keccak256/hashString.js:19 Hash string with Keccak-256 String is UTF-8 encoded before hashing.

Parameters

str

string String to hash

Returns

Keccak256Hash 32-byte hash

See

https://voltaire.tevm.sh/crypto for crypto documentation

Since

0.0.0

Throws

Example

import { Keccak256Hash } from './crypto/Keccak256/index.js';
const hash = Keccak256Hash.fromString('hello');

selector()

selector(signature): Uint8Array<ArrayBufferLike>

Defined in: src/crypto/Keccak256/selector.js:20 Compute function selector (first 4 bytes of Keccak-256 hash) Used for Ethereum function signatures.

Parameters

signature

string Function signature string

Returns

Uint8Array<ArrayBufferLike> 4-byte selector

See

https://voltaire.tevm.sh/crypto for crypto documentation

Since

0.0.0

Throws

Example

import * as Keccak256 from './crypto/Keccak256/index.js';
const selector = Keccak256.selector('transfer(address,uint256)');
// Uint8Array(4) [0xa9, 0x05, 0x9c, 0xbb]

topic()

topic(signature): Keccak256Hash

Defined in: src/crypto/Keccak256/topic.js:19 Compute event topic (32-byte Keccak-256 hash) Used for Ethereum event signatures.

Parameters

signature

string Event signature string

Returns

Keccak256Hash 32-byte topic

See

https://voltaire.tevm.sh/crypto for crypto documentation

Since

0.0.0

Throws

Example

import { Keccak256Hash } from './crypto/Keccak256/index.js';
const topic = Keccak256Hash.fromTopic('Transfer(address,address,uint256)');

References

Keccak256Hash

Re-exports Keccak256Hash

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Developer Documentation

Generated API (TypeDoc)

​crypto/Keccak256

​Variables

​DIGEST_SIZE

​Since

​Keccak256

​Type Declaration

contractAddress()

Parameters

sender

nonce

Returns

See

Since

Throws

Example

create2Address()

Parameters

sender

salt

initCodeHash

Returns

See

Since

Throws

Throws

Throws

Example

DIGEST_SIZE

Since

from()

Parameters

input

Returns

See

Since

Throws

Example

fromHex()

Parameters

hex

Returns

See

Since

Throws

Example

fromString()

Parameters

str

Returns

See

Since

Throws

Example

fromTopic()

Parameters

signature

Returns

See

Since

Throws

Example

hash()

Parameters

data

crypto/Keccak256

Variables

DIGEST_SIZE

Since

Keccak256

Type Declaration

Deprecated

RATE

Since

STATE_SIZE

Since

Functions

contractAddress()

Parameters

Returns

See

Since

Throws

Example

create2Address()

Parameters