Raw Signing (EVM)

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signRawMessage lets you sign a digest exactly as you supply it, with no prefixing or re-hashing by the SDK. Use it when you need full control over hashing and formatting — non-standard signing flows, or chain/app-specific message formats.

signRawMessage is EVM-specific, and EVM is the only wallet that needs it. On EVM, signMessage follows ERC-191: it prefixes your input with \x19Ethereum Signed Message:\n<length> before hashing. signRawMessage exists to bypass that prefix.

On Ed25519 chains there is no prefix to bypass — signMessage already produces a raw signature over the exact bytes you pass. To sign transaction digests for Solana, or for any chain derived from the Solana wallet, use signMessage and see the Tier 2 and 3 chains technical overview.

Basic raw signing (hash then sign)

    import { keccak256, stringToHex } from 'viem';
    import { DynamicWaasEVMConnector } from '@dynamic-labs/sdk-react-core';

    const rawMessage = "Hello World";

    // primaryWallet should be an EVM embedded wallet
    const connector = primaryWallet.connector as DynamicWaasEVMConnector;

    // Dynamic expects the message as a hex string (no 0x) when signing a pre-hashed payload
    const hash = keccak256(stringToHex(rawMessage)).slice(2);

    const signature = await connector.signRawMessage({
      accountAddress: primaryWallet.address,
      message: hash,
    });

    console.log("Signature:", signature);

Encoding options

Dynamic supports different encoding formats for your raw messages depending on what you need to hash/sign.

Hexadecimal encoding

Most common for blockchain applications. The message is encoded as a hex string.

    import { stringToHex } from 'viem';

    const message = "Hello World";
    const hexEncoded = stringToHex(message);
    // Result: "0x48656c6c6f20576f726c64"

UTF-8 text encoding

For plain text messages that don’t require hex encoding.

Hello World

Hash functions

Different hash functions serve different purposes in cryptographic signing.

Keccak256 (Ethereum standard)

import { keccak256, stringToHex } from 'viem';

const message = "Hello World";
const hash = keccak256(stringToHex(message));

Raw signing on non-EVM chains

Every Dynamic embedded wallet can sign arbitrary digests. Which method you call depends on whether the chain’s default signMessage wraps your input:

Curve family	Root wallet	Method	Why
secp256k1	EVM	signRawMessage	signMessage adds the ERC-191 prefix, so a raw digest needs signRawMessage
Ed25519	Solana	signMessage	Signs the exact bytes you pass — no prefix, so no separate raw API is needed

Chains built on top of these wallets — Aptos, NEAR, Cardano and Mavryk from the Solana wallet; Cosmos, XRP and Tron from the EVM wallet — follow the same rule. See the Tier 2 and 3 chains technical overview for the complete derive-and-sign pattern, and Aptos for a worked Ed25519 example.