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POST
/
sdk
/
{environmentId}
/
flow
/
{flowId}
/
source
Attach a source to a flow and mint a session token
curl --request POST \
  --url https://app.dynamicauth.com/api/v0/sdk/{environmentId}/flow/{flowId}/source \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "fromAddress": "0xbF394748301603f18d953C90F0b087CBEC0E1834",
  "fromChainId": "An example name"
}
'
{
  "sessionExpiresAt": "2023-11-07T05:31:56Z",
  "sessionToken": "dct_A1B2C3...",
  "flow": {
    "id": "95b11417-f18f-457f-8804-68e361f9164f",
    "amount": "<string>",
    "currency": "An example name",
    "settlementConfig": {
      "settlements": [
        {
          "tokenAddress": "An example name",
          "chainId": "An example name",
          "symbol": "An example name",
          "tokenDecimals": 18,
          "isNative": true
        }
      ]
    },
    "quoteVersion": 123,
    "createdAt": "2023-11-07T05:31:56Z",
    "updatedAt": "2023-11-07T05:31:56Z",
    "destinationConfig": {
      "destinations": [
        {
          "type": "address",
          "identifier": "An example name"
        }
      ]
    },
    "memo": {},
    "userId": "95b11417-f18f-457f-8804-68e361f9164f",
    "fromAddress": "0xbF394748301603f18d953C90F0b087CBEC0E1834",
    "fromChainId": "An example name",
    "fromToken": "An example name",
    "toAddress": "0xbF394748301603f18d953C90F0b087CBEC0E1834",
    "toChainId": "An example name",
    "toToken": "An example name",
    "quote": {
      "version": 123,
      "fromAmount": "<string>",
      "toAmount": "<string>",
      "createdAt": "2023-11-07T05:31:56Z",
      "expiresAt": "2023-11-07T05:31:56Z",
      "fees": {
        "totalFeeUsd": "<string>",
        "gasEstimate": {
          "usdValue": "<string>",
          "nativeValue": "<string>",
          "nativeSymbol": "<string>"
        }
      },
      "estimatedTimeSec": 123,
      "rawQuote": {},
      "signingPayload": {
        "chainId": "<string>",
        "evmTransaction": {
          "to": "<string>",
          "data": "<string>",
          "value": "<string>",
          "gasLimit": "<string>",
          "gasPrice": "<string>",
          "maxFeePerGas": "<string>",
          "maxPriorityFeePerGas": "<string>",
          "nonce": 123
        },
        "evmApproval": {
          "tokenAddress": "<string>",
          "spenderAddress": "<string>",
          "amount": "<string>"
        },
        "serializedTransaction": "<string>",
        "psbt": "<string>",
        "tronTransaction": {
          "rawDataHex": "<string>",
          "to": "<string>",
          "value": "<string>"
        }
      }
    },
    "txHash": "<string>",
    "broadcastedAt": "2023-11-07T05:31:56Z",
    "sourceConfirmedAt": "2023-11-07T05:31:56Z",
    "confirmations": 123,
    "settlement": {
      "toChainId": "An example name",
      "toToken": "An example name",
      "toAddress": "0xbF394748301603f18d953C90F0b087CBEC0E1834",
      "completedAt": "2023-11-07T05:31:56Z"
    },
    "completedAt": "2023-11-07T05:31:56Z",
    "failure": {
      "code": "An example name",
      "message": "<string>",
      "category": "An example name",
      "stage": "An example name",
      "retryable": true,
      "details": {}
    },
    "expiresAt": "2023-11-07T05:31:56Z",
    "exchangeSource": {
      "exchangeId": "95b11417-f18f-457f-8804-68e361f9164f",
      "metadata": {}
    }
  }
}

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"

​
flowId
string
required

UUID of the flow

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

fromAddress, fromChainId, and fromChainName are required when sourceType is 'wallet'. When sourceType is 'exchange', they are optional; pass exchangeProvider to generate the buy URL and create the exchange source record server-side. When sourceType is 'deposit_address', fromChainId and fromChainName are required so the bridge provider knows the source chain; fromAddress is optional (omit when the customer pays from a CEX with no connected wallet).

​
sourceType
enum<string>
required

How a flow is funded — a connected wallet, a CEX, or a deposit address.

Available options:
wallet,
exchange,
deposit_address
​
fromAddress
string

Valid blockchain wallet address, must be an alphanumeric string (underscores allowed for chains like Midnight, hyphens allowed for chains using base64url-encoded addresses like TON)

Maximum string length: 255
Pattern: ^[A-Za-z0-9_-]{18,100}$
Example:

"0xbF394748301603f18d953C90F0b087CBEC0E1834"

​
fromChainId
string
Maximum string length: 50
Pattern: ^(?=\S)[\p{L}\p{N}a-zA-Z _.,:!?&%@\/+\-'|]+(?<=\S)$
Example:

"An example name"

​
fromChainName
enum<string>
Available options:
ETH,
EVM,
FLOW,
SOL,
ALGO,
STARK,
COSMOS,
BTC,
ECLIPSE,
SUI,
SPARK,
TRON,
APTOS,
TON,
STELLAR,
ALEO,
TEMPO,
MIDNIGHT
​
exchangeProvider
enum<string>

Source exchange identifier

Available options:
coinbase,
kraken

Response

Source attached; session token minted

Response from the source endpoint — carries the one-time capability session token plus the current flow state.

​
sessionExpiresAt
string<date-time>
required

When the session token expires.

​
sessionToken
string
required

Opaque capability token for authenticating subsequent calls on this flow (quote/prepare/broadcast). Minted by the source endpoint and returned exactly once — store it immediately. At most one live token exists per flow at a time. Format: dft_.

Example:

"dct_A1B2C3..."

​
flow
object
required

A single payment, deposit, or withdraw flow. Collapses the former Checkout and CheckoutTransaction into one resource.