DEXInfo Fees Endpoint

Fee Estimation Endpoint

The fee estimation endpoint lives under the /fees route and accepts a POSTed JSON in the following format:

{ tx: AbstractTransactionMappingRequest }

Where the AbstractTransactionMappingRequest model is defined here: https://github.com/allinbits/emeris-libraries/blob/feat/mapper-updates/packages/types/src/EmerisTransactions.ts#L153-L157

Essentially we provide the chain name this Tx is for, the signing address and an array of abstract transactions/messages to be included.

Abstract transactions are defined here: https://github.com/allinbits/emeris-libraries/blob/feat/mapper-updates/packages/types/src/EmerisTransactions.ts#L151

The fees route handler then proceeds to:

• fetch chain information for the provided chain name
• instantiate an emeris signer object (provided by @emeris/signer: https://github.com/allinbits/emeris-libraries/tree/feat/mapper-updates/packages/signer/src) with a dummy account/mnemonic.
• map the abstract transactions to chain and library specific messages using the map() function provided by @emeris/mapper (https://github.com/allinbits/emeris-libraries/tree/feat/mapper-updates/packages/mapper/src)
• use the getFees() method provided by the emeris signer object with the chain name and mapped chain-specific messages to get the estimated fee and return it