@debridge-finance/dln-client v17.5.0
dln-client
by deBridge
A client SDK that facilitates interaction deSwap Liquidity Network (DLN) contracts on Solana and EVM blockchains. DLN is built on top of the deBridge cross-chain messaging protocol.
A note on calculating execution fees and take cost
Consider looking at https://github.com/debridge-finance/dln-ts-client/pull/63 for definitions
DLN order creation and expenses
Main flow:
Order creation -> Fulfill / Cancel -> Send unlock -> Claim
After order creation you need to send fulfill, unlock transactions. Also, if order has calldata you need to store and execute it.
Solana to EVM
Transactions order: 1. Order creation (Solana) 2. Fulfill (EVM) / Cancel (EVM) 3. Send unlock (EVM) 4. Claim (Solana) 5. Execution calldata (Solana)
Order creation
Transaction example. This transaction contains the following expenses and returns:
Instruction | Spend type | Account name | Bytes (for alloc) | Lamports | Comment |
---|---|---|---|---|---|
CreateOrderWithNonce | rent | giveOrderState | 176 | -2115840 | |
rent | giveOrderWallet | 165 | -2039280 | ||
rent | nonceMaster | 16 | -1002240 | Is added when dln nonce account doesn't exists | |
tx fee | -5000 | ||||
priority fee |
Claim
Claim transaction follows after fulfill/cancel and send unlock transactions in source chain. Transaction example. This transaction contains the following expenses and returns:
Instruction | Spend type | Account name | Bytes (for alloc) | Lamports | Comment |
---|---|---|---|---|---|
Claim | rent | claimToWallet | 165 | -2039280 | Should be returned after claim |
rent | submission | 194 | -2241120 | Should be returned after claim | |
rent return | confirmationStorage | +5909040 | |||
tx fee | -5000 | ||||
priority fee |
Execution calldata
Before calldata execution you need to fulfill order. Transaction example. This transaction contains the following expenses and returns:
Instruction | Spend type | Account name | Bytes (for alloc) | Lamports | Comment |
---|---|---|---|---|---|
ExecuteExternalCall | rent return | externalCallStorage | +13906080 | ||
rent return | externalCallMeta | +1085760 | |||
rent return | submissionWallet | +2039280 | |||
tx fee | -5000 | ||||
priority fee |
EVM to Solana
Transactions order: 1. Order creation (EVM) 2. Fulfill (Solana) / Cancel (Solana) 3. Send unlock (Solana) 4. Claim (EVM) 5. Execution calldata (EVM)
Fulfill
Creates accounts for on-chain data storing which contains order state and additional accounts for calldata.
Transaction example.
This transaction contains the following expenses and returns:
Instruction | Spend type | Account name | Bytes (for alloc) | Lamports | Comment |
---|---|---|---|---|---|
FulfillOrder | rent | takeOrderState | 106 | -1628640 | |
InitializeExtcallMeta | rent | externalCallMeta | 200 | -2282880 | Creates if order contains calldata |
rent | executeWallet | 165 | -2039280 | Adds if take order token on Solana is SPL and calldata exists | |
tx fee | -5000 | ||||
priority fee |
Send unlock
For availability to claim order in destination chain. Transaction example. This transaction contains the following expenses and returns:
Instruction | Spend type | Account name | Bytes (for alloc) | Lamports | Comment |
---|---|---|---|---|---|
PrepareSend | transfer | sendFrom | = externalCallStorage + externalCallMeta + debridge fix fee (transferred to debridge feeBeneficiary) | ||
transfer | sendFromWallet | = execution fee | |||
SendUnlock / SendBatchUnlock | rent | nonceStorage | 16 | -1002240 | Is added when debridge nonce account doesn't exist |
rent | externalCallStorage | 76 | -1419840 | If batch unlock it would be 108 + (32 * n), where n - amount of orders in batch | |
rent | externalCallMeta | 28 | -1085760 | ||
protocol fee | -30000000 | Transfers to feeBeneficiary (prod value, hanoi value is 100000) | |||
execution fee | -57823 | Depends from give chain, transfers to stakingWallet | |||
tx fee | -5000 | ||||
priority fee |
Cancel
Calls instead of fulfill if you want to cancel an order. Transaction example. This transaction contains the following expenses:
Instruction | Spend type | Account name | Bytes (for alloc) | Lamports | Comment |
---|---|---|---|---|---|
CancelOrder | rent | takeOrderState | 106 | -1628640 | |
PrepareSend | transfer | sendFrom | = externalCallStorage + externalCallMeta + debridge fix fee (transferred to debridge feeBeneficiary) | ||
transfer | sendFromWallet | = execution fee | |||
SendUnlock | rent | nonceStorage | 16 | -1002240 | Is added when debridge nonce account doesn't exist |
rent | externalCallStorage | 76 | -1419840 | ||
rent | externalCallMeta | 28 | -1085760 | ||
protocol fee | -30000000 | Transfers to feeBeneficiary (prod value, hanoi value is 100000) | |||
execution fee | -364728 | Depends from give chain, transfers to stakingWallet | |||
tx fee | -5000 | ||||
priority fee |
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