Page Comparison

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1. approve

   1. Steps:

      1. User (via a dApp) calls wraptokens

      2. The oracle executes a mint then an approve

      3. The user (via a dApp) executes a transferFrom

      4. The user adds wfio token to Metamask (or similar) holding their Ethereum key and now sees their wfio

   2. Pros:

      1. This is a more standard approach to transferring ERC20 tokens. For example, Uniswap first asks users to “approve” the transaction. Once approved a second “transferFrom” step happens.

      2. Using approve gives an extra layer of security to the transfer process. In theory, if a mistake is made during approve, the approval can be modified (assuming the transferFrom has not occurred).

      3. The user pays the fees for the transferFrom

   3. Cons:

      1. Extra steps

2. transfer

   1. Steps:

      1. User (via a dApp) calls wraptokensT

      2. The oracle executes a mint then a transfer

      3. The user adds wfio token to Metamask (or similar) holding their Ethereum key and now sees their wfio

Alternative

1. User (via a dApp) calls wraptokens

2. Oracle #1 calls mintTransfer

   1. ERC20 contract collects “observation” #1

3. Oracle #2 calls mintTransfer

   1. mintTransfer calls _mint (mints to contract , not to Oracle)

   2. mintTransfer calls transfer (to user Ethereum key)