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POST
/
sdk
/
{environmentId}
/
chains
/
{chainName}
/
transactions
/
estimate
Estimate transaction fees
curl --request POST \
  --url https://app.dynamicauth.com/api/v0/sdk/{environmentId}/chains/{chainName}/transactions/estimate \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "base64RawTransaction": "<string>",
  "fromAddress": "0xbF394748301603f18d953C90F0b087CBEC0E1834",
  "rawTransactionData": "<string>"
}
'
{
  "estimatedFee": "<string>",
  "currency": "<string>",
  "decimals": 123,
  "units": "<string>",
  "unitPrice": "<string>",
  "baseFee": "<string>",
  "priorityFee": "<string>",
  "maxFee": "<string>"
}

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"

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

Body

application/json

Raw transaction to estimate

​
base64RawTransaction
string
deprecated

Deprecated — use rawTransactionData instead. The base64-encoded raw transaction to estimate gas fees for.

Pattern: ^[A-Za-z0-9+/]*={0,2}$
​
fromAddress
string

Valid blockchain wallet address, must be an alphanumeric string without any special characters

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

"0xbF394748301603f18d953C90F0b087CBEC0E1834"

​
rawTransactionData
string

The raw transaction data to estimate gas fees for. For BTC, the PSBT string. For EVM, the transaction data in JSON format with properties: { to, data, value }. For Solana, the base64-encoded transaction data. For Sui, the base64-encoded transaction data.

Response

Transaction fee estimate returned successfully

​
estimatedFee
string
required

Total estimated fee in the smallest unit of the native currency

​
currency
string
required

Native currency symbol (ETH, SOL, BTC, SUI, etc.)

​
decimals
integer

Number of decimals for the native currency

​
units
string

Estimated units of compute/space required (gas, compute units, vBytes, etc.)

​
unitPrice
string

Price per unit in the smallest denomination

​
baseFee
string

Base fee component

​
priorityFee
string

Priority/tip fee component

​
maxFee
string

Maximum possible fee (for chains with variable pricing)