Approve

post

https://svc.blockdaemon.com/defi/v1/fungibletoken/approve

This endpoint is used to grant permission for a designated spender to withdraw tokens from a user's ERC-20 token balance. By invoking the standard ERC-20 approve function, it sets an allowance that enables the spender to access up to a specified number of tokens on behalf of the user.

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Compute Unit Value: 80 (Fixed)

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Body Params

The request body for a /defi/v1/fungibletoken/approve

from

string

required

Blockchain address of the sender. For EVM chains, use a checksummed hex address (e.g., 0xABCDEF...). This address must hold sufficient balance and will sign the transaction.

tokenAddress

string

required

Address of the token.

amount

string

required

Number of tokens, specified in the token's smallest denomination (base units). Do not send human-readable decimal values. Examples: 1 WETH (18 decimals) = "1000000000000000000"; 1 USDC (6 decimals) = "1000000".

string

required

Blockchain address of the recipient. For EVM chains, use a checksummed hex address (e.g., 0xABCDEF...).

gas

string

Maximum number of gas units to allocate for the transaction, as an integer string (e.g., '200000'). If omitted, gas is estimated automatically. Note: this is gas units, not wei or gwei.

chainId

string

enum

The unique ID to direct queries or transactions to the correct blockchain. Find more here.

chainSymbol

string

The abbreviated chain name for queries or transactions.

gasPriority

string

Specifies the priority level for gas fees (e.g., 'low', 'medium', or 'high'), which influences the transaction speed and cost. Defaults to 'medium'.

enableFee

boolean

Flag to include a basis points fee transaction alongside the main transaction when set to true.

simulate

boolean

When true, dry-runs the transaction batch via eth_simulateV1 and returns a simulate field with status and error on each transaction.

Response

200Successful response