Several key features and improvements including better USDC support, new fiat on-ramp options, currency display conversion and new admin/usability features
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Here is a full video walkthrough for managing conflicts that will come up if you merge v4.2 into an existing application. It is long but worth it to get the full understanding of what changes/improvements have been made and how they may impact existing customizations you have already made:
Optimizations for USDC and alternative ERC-20 currencies
Fix for thirdweb create listing when targeting USDC (removed placeholders for assetcontract in base URL option set
Fix for check balance when targeting USDC
Fix for User Balance on ERC-20 tokens that have decimals other than 18 (i.e. USDC on mumbai 0xf3e547EDD97F60227c7bc9FE57FB4228DC447d26 has decimals of 6)
Optimizations for fiat on-ramp
Streamlining recharge workflow for /item page
Wert + Transak fiat on-ramp redirect widgets (api keys required for all on-ramp options)
Added hostedApiKey parameter for live mode for Ramp network
Fiat currency display enhancements
New dropdown to switch to USD, EUR or GBP display
New features
Switch default wallet workflow for existing users via magic link (for when wallet address gets reset, i.e. web3auth versioning or other reasons)
Simple admin dashboard for split contracts with view balance and deploy actions
v0.1 of exclusive content (available but not integrated into create workflow)
Miscellaneous
added app_version to options sets to track versioning of templates
changed "BaseURL" option set name to "settings_technical (BaseURL)"
Fix for service fee displayed calculation for put on sale at set fixed price, place bid 1155 and set auction 1155 on item page (multiply by quantity)
Added inputs for key configuration inputs into admin technical settings screen.
fixed service fee calculation on /create_item page
fixed logic on /item page listing creation where price was not being saved
Removed deprecated pages and workflows related to off-chain presale NFTs
Fix for purchase workflow for 1155 (if you are not seeing nft listed in user's account profile, it is missing the NFT in User's List-item-owned value)
Fix to add Featured flag check for mobile "Featured" seaction Search for Collection conditions
