curl --request POST \
  --url https://testnet.walletkit.com/transactions/sign \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '{
  "network": "Ethereum",
  "signer_wallet_address": "<string>",
  "unsigned_transaction": {
    "to": "<string>",
    "value": "<string>",
    "input": "<string>",
    "gasLimit": "<string>",
    "maxPriorityFeePerGas": "<string>",
    "maxFeePerGas": "<string>",
    "nonce": "<string>"
  },
  "developer_secret": "<string>",
  "user_pin": "<string>"
}'
"<string>"

​
Headers

​
X-WalletKit-Project-ID
string
required

Your WalletKit Project ID can be found on the API Keys page in the WalletKit Dashboard.

Authorizations

​
Authorization
string
header
required

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

Body

application/json
​
network
enum<string>
required
Available options:
Ethereum,
Polygon,
Base,
Avalanche,
Polkadot,
Vara
​
signer_wallet_address
string
required

address can only be the ones created in the project.

​
unsigned_transaction
object
required

input of a transaction to be signed.

​
developer_secret
string | null

On testnet, the developer_secret is always "testnet-secret". On mainnet, the developer_secret is set by the developer during account activation.

​
user_pin
string | null

A 6-digit numeric pin that is only known to the user, set during wallet creation. This pin is required to sign transactions from this wallet.

Response

200
application/json
signed transaction. This is the raw transaction that can be sent to the rpc node. e.g. input to eth_sendrawtransaction

The response is of type string.

Sign and SendBatch Sign and Send