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POST
/
sdk
/
{environmentId}
/
waas
/
{walletId}
/
signMessage
Sign a message with a WAAS wallet
curl --request POST \
  --url https://app.dynamicauth.com/api/v0/sdk/{environmentId}/waas/{walletId}/signMessage \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "message": "<string>",
  "isFormatted": true,
  "roomId": "<string>",
  "context": {
    "evmUserOperation": {
      "chainId": 123,
      "entryPoint": "<string>",
      "operation": {
        "authorization": {
          "address": "<string>",
          "chainId": 123,
          "nonce": 123,
          "r": "<string>",
          "s": "<string>",
          "v": "<string>",
          "yParity": 123
        },
        "callData": "<string>",
        "callGasLimit": "<string>",
        "factory": "<string>",
        "factoryData": "<string>",
        "maxFeePerGas": "<string>",
        "maxPriorityFeePerGas": "<string>",
        "nonce": "<string>",
        "paymaster": "<string>",
        "paymasterData": "<string>",
        "paymasterPostOpGasLimit": "<string>",
        "paymasterVerificationGasLimit": "<string>",
        "preVerificationGas": "<string>",
        "sender": "<string>",
        "signature": "<string>",
        "verificationGasLimit": "<string>"
      }
    },
    "evmMessage": "<string>",
    "svmMessage": "<string>",
    "suiMessage": "<string>",
    "stellarMessage": "<string>",
    "domain": "https://app.xyz.com"
  },
  "bitcoinConfig": {
    "addressType": "<string>",
    "network": "<string>"
  },
  "shareSetId": "95b11417-f18f-457f-8804-68e361f9164f"
}
'
{
  "roomId": "<string>",
  "serverKeygenIds": [
    "<string>"
  ],
  "newServerKeygenIds": [
    "<string>"
  ],
  "walletId": "95b11417-f18f-457f-8804-68e361f9164f"
}

Authorizations

​
Authorization
string
header
required

Bearer authentication header of the form Bearer <token>, where <token> is your auth token.

Path Parameters

​
environmentId
string
required

ID of the environment

Required string length: 36
Pattern: ^[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}$
Example:

"95b11417-f18f-457f-8804-68e361f9164f"

​
walletId
string
required

UUID of the wallet

Required string length: 36
Pattern: ^[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}$
Example:

"95b11417-f18f-457f-8804-68e361f9164f"

Body

application/json

Sign Message Request

​
message
string
required

A string with a max length of 204800 characters

Maximum string length: 204800
​
isFormatted
boolean

When true, message is treated as a pre-computed 32-byte hash (64 hex characters, optionally with a leading 0x) and signed by the MPC server as-is ("raw signing"). When false or omitted, the SDK hashes the message bytes using the chain's standard algorithm (e.g. keccak256 for EVM).

​
roomId
string

MPC room identifier for the signing session

​
context
object
​
bitcoinConfig
object
​
shareSetId
string

Optional identifier of the share set this operation targets. When omitted, the active rootUser share set for walletId is resolved server-side (backwards-compat fallback for older SDKs).

Required string length: 36
Pattern: ^[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}$
Example:

"95b11417-f18f-457f-8804-68e361f9164f"

Response

Successfully created a room for signing message ceremony

​
roomId
string
required

Unique identifier of the opened MPC room

​
serverKeygenIds
string[]

List of existing server-side key generation identifiers

A base58 string with a max length of 100 characters

Maximum string length: 100
Pattern: ^[1-9A-HJ-NP-Za-km-z]+$
​
newServerKeygenIds
string[]

List of newly generated server-side key generation identifiers

A base58 string with a max length of 100 characters

Maximum string length: 100
Pattern: ^[1-9A-HJ-NP-Za-km-z]+$
​
walletId
string
Required string length: 36
Pattern: ^[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}$
Example:

"95b11417-f18f-457f-8804-68e361f9164f"