@token.allowance

Fetch the allowance an owner has granted to a spender, in base units.

Returns: number

Syntax

@token.allowance(tokenSymbol owner spender)

Arguments

Name	Type	Description
tokenSymbol	token-symbol	Token symbol (e.g. DAI) or address
owner	address	Owner address
spender	address	Spender address

Examples

# Query an allowance
set $allowance @token.allowance(DAI @me 0x4F2083f5fBede34C2714aFfb3105539775f7FE64)

# Top up an allowance only when it is too low
set $spender 0x4F2083f5fBede34C2714aFfb3105539775f7FE64
if @bool(@token.allowance(DAI @me $spender) < @token.amount(DAI 100)) (
  exec @token(DAI) "approve(address,uint256)" $spender @token.amount(DAI 100)
)

See Also

• @token.balance — token balance of an address
• @token.amount — convert to base units