Hashing and Cryptography

The Sway standard library provides easy access to a selection of cryptographic hash functions (sha256 and EVM-compatible keccak256), and EVM-compatible secp256k1-based signature recovery operations.

Hashing

sway

{{#include ../../../../examples/hashing/src/main.sw}}

Cryptographic Signature Recovery and Verification

Fuel supports 3 asymmetric cryptographic signature schemes; Secp256k1, Secp256r1, and Ed25519.

Public Key Recovery

Given a Signature and a sign Message, you can recover a PublicKey.

sway

{{#include ../../../../examples/signatures/src/main.sw:public_key_recovery}}

Signed Message Address Recovery

Given a Signature and signed Message, you can recover a Fuel Address.

sway

{{#include ../../../../examples/signatures/src/main.sw:address_recovery}}

Signed Message EVM Address Recovery

Recovery of EVM addresses is also supported.

sway

{{#include ../../../../examples/signatures/src/main.sw:evm_address_recovery}}

Public Key Signature Verification

Given a Signature, PublicKey, and Message, you can verify that the message was signed using the public key.

sway

{{#include ../../../../examples/signatures/src/main.sw:signature_verification}}

Address Signature Verification

Given a Signature, Address, and Message, you can verify that the message was signed by the address.

sway

{{#include ../../../../examples/signatures/src/main.sw:address_verification}}

EVM Address Signature Verification

Recovery of EVM addresses verification is also supported.

sway

{{#include ../../../../examples/signatures/src/main.sw:evm_address_verification}}