flash_swap_callback

An entrypoint that executes after execution of user's lambda but only in case when user is trying to loan TEZ tokens. It checks the returns of TEZ tokens and fills it to the appropriative Bucket contract.
When user need to return TEZ tokens, he need to transfer correct amount of TEZ tokens to the DexCore contract at the end of his lambda execution.
Call parameters
type token_id_t         is nat
​
type flash_swap_1_t     is [@layout:comb] record [
  pair_id                 : token_id_t;
  prev_tez_balance        : nat;
  amount_in               : nat;
]
Field
Type
Description
pair_id
token_id_t (nat)
Identifier of the liquidity pool (pair)
prev_tez_balance
nat
TEZ balance of DexCore contract before execution of user's lambda
amount_in
nat
The number of incoming tokens (amount that user must repay)
Usage
Only DexCore contract can call this entrypoint.
Errors
108 - pair (pool) with the specified token_id not listed.
113 - a Bucket contract not found (not TOK/TEZ LP pair).
129 - wrong amount of flash swap returns.
138 - only entered (transaction must be not the first transaction in the chain of calls).
403 - sender of the transaction is not DexCore contract.
412 - non payable entrypoint (can't accept TEZ tokens during call of an entrypoint).

Field	Type	Description
pair_id	token_id_t (nat)	Identifier of the liquidity pool (pair)
prev_tez_balance	nat	TEZ balance of DexCore contract before execution of user's lambda
amount_in	nat	The number of incoming tokens (amount that user must repay)

launch_callback

Last modified 1yr ago