Hydro
  • Getting Started
  • Raindrop
    • Raindrop Overview
    • Client Side Raindrop
      • Client-Side Raindrop Overview
      • Handling User Signatures
      • Recognizing Users
      • User Account Management
        • Check if Username is Taken
        • Creating HydroIDs
        • Creating HydroIDs (delegated)
        • Deleting Users
      • Verifying signatures
    • Server Side Raindrop
  • Snowflake
    • Snowflake Overview
      • Setting Up Snowflake
      • Naming Conventions
      • Handling User Signatures
    • Address Management
      • Adding Addresses
      • Removing Addresses
    • Provider Management
      • Add Providers
      • Upgrade Providers
    • Resolver Management
      • Adding Resolvers
      • Adding Resolvers (delegated)
      • Removing Resolvers
    • Allowances in Snowflake
      • User Hydro Balances and the Allowance Structure
      • Allowance management logic
      • Setting Initial DApp Allowances
      • Changing DApp Allowances
      • Change DApp Allowances (Delegated)
    • Payments in Snowflake
      • Self-Initiated Payments
      • Resolver-Initiated Payments
        • EIN - EIN Transfer
        • EIN - Address Withdrawal
      • Resolver-Initiated Via Payments
        • EIN - Via - EIN Transfer
        • EIN - Via - Address Withdrawals
      • Resolver-As-Escrow Payments
        • Resolver - EIN Transfer
        • Resolver - Address Withdrawal
      • Resolver-As-Escrow Via Payments
        • Resolver - Via - EIN Transfer
        • Resolver - Via - Address Withdrawal
    • Building a Resolver
      • Smart Contract
      • React Front-End
    • Building a Via Contract
  • Ice
    • Untitled
  • Tide
    • Untitled
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  1. Snowflake
  2. Allowances in Snowflake

Changing DApp Allowances

If a user wishes to change an Allowance for a DApp, they may call the changeResolverAllowances function on the Snowflake smart contract with an array of Resolver addresses for whom the allowance is being changed, and an array of uints denoting the corresponding new allowances.

ARGUMENTS

Parameter

Type

Description

resolvers

address[]

Array of addresses of Resolversfor which the allowance is being changed.

withdrawAllowances

uint[]

An array of uints of the new allowance for each corresponding Resolver address.

Note that unlike allowances in the ERC token structure and most allowance patterns for Ethereum smart contracts, in Snowflake it is acceptable for nonzero allowances to be changed, as Resolvers must be vetted onSignup, after which the scope of malicious behavior is already pre-defined.

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Last updated 6 years ago

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