Carbon DeFi Dev
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          • approve() / allowance()
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        • controllerType()
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    • CarbonVortex Functions
      • Write Functions
        • trade()
        • execute()
      • Read Functions
        • amountAvailableForTrading()
        • availableTokens()
        • expectedTradeInput()
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        • finalTargetToken()
        • minTargetTokenSaleAmount()
        • minTokenSaleAmount()
        • pairDisabled()
        • priceDecayHalfLife()
        • rewardsPPM()
        • targetToken()
        • targetTokenPriceDecayHalfLife()
        • targetTokenSaleAmount()
        • tokenPrice()
        • totalCollected()
        • tradingEnabled()
    • CarbonVortexBridge Functions
      • Write Functions
        • Bridge()
  • Rest API
    • Carbon DeFi Public REST API
  • Developer Guides
    • Carbon DeFi SDK
      • Getting started
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        • Managing Strategies
        • Performing Trades
        • Getting User and Pair Data
        • Collecting Liquidity Data
      • SDK Functions
        • constructor
        • startDataSync
        • getCachedPairs
        • hasLiquidityByPair
        • getLiquidityByPair
        • getUserStrategies
        • getTradeData
        • composeTradeByTargetTransaction
        • composeTradeBySourceTransaction
        • createBuySellStrategy
        • updateStrategy
        • deleteStrategy
        • getMinRateByPair
        • getMaxRateByPair
        • getRateLiquidityDepthByPair
    • The Carbon DeFi versus Uniswap V3 Invariant Functions
    • Carbon DeFi Subgraph
      • Accessing the Subgraph
      • Creating Subgraph Queries
      • Subgraph Query in Python
      • Sample Subgraph Queries
    • Using CarbonVortex
      • CarbonVortex Dynamics
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  1. Contracts & Functions
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  3. Write Functions

Transaction Prerequisites

PreviousWrite FunctionsNextapprove() / allowance()

Last updated 7 months ago

Before interacting with any blockchain smart contract, approval must be granted by the user for use of their tokens.

The options to grant approval include:

approve()
allowance()