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Contract: Pool-Based Transfer
Trigger cBridge contract `send` function to move user's assets to cBridge contract on source chain. Then cBridge gateway and Celer SGN will send assets to the user's asset on the destination chain
Pool-based transfers are done via the Bridge contract, specifically via the send or sendNative functions. For advanced users, these two functions can be called from smart contracts, but please read the refund process before you proceed.
Here is the abi for Bridge: https://github.com/celer-network/cBridge-typescript-client/tree/main/contract/abi/Bridge.sol
- Transfer gas token(ETH): sendNative. No need to provide token address
- Transfer ERC20 token: send. Token address is needed
/// SendNative
const transferTx = await transactor(
bridge.sendNative(
"0xaa47c83316edc05cf9ff7136296b026c5de7eccd", /// User's wallet Address
100000000, /// Transfer amount with decimal
4002, /// Destination chain id
1638864397751, /// Nonce
3000, /// Max slippage
{
value: 100000000, /// Same amount as above
},
),
).catch(e => {
/// Handle Error
});
/// Send
const transferTx = await transactor(
bridge.send(
"0xdad9d86885d217b92a47370e1e785897dd09a4f3", /// User's Wallet Address
"0x7d43aabc515c356145049227cee54b608342c0ad", /// Selected Token Address
10000000000, /// Transfer amount with decimal
5, /// Destination chain id
1638862397751, /// Nonce
780, /// Max slippage
),
).catch(e => {
/// Handle Error
});
Name | Type | Description |
|---|---|---|
receiver | String | User's wallet address |
token | String | Token's address on source chain |
amount | BigNumber | Token amount to be sent |
dst_chain_id | BigNumber | Destination chain id |
nonce | BigNumber | Current timestamp |
max_slippage | BigNumber |
If you want to use a max_slippage with your own calculation, please make sure it is not less than minimalMaxSlippage given by cBridge contract. Otherwise, the transaction will fail.
If
receiver is a smart contract and the token you are sending is a wrapped native gas token on the destination chain, make sure the contract can receive native gas token by implementing fallback / receive functions.When you submit on-chain send transaction, you can also generate a transfer id for future reference. For example, it is used for getTransferStatus and withdrawLiquidityForTransferRefund. It should be the same as transferId inside on-chain transaction log.
const transfer_id = ethers.utils.solidityKeccak256(
[
"address",
"address",
"address",
"uint256",
"uint64",
"uint64",
"uint64"
],
[
"0xdad9d86885d217b92a47370e1e785897dd09a4f3", /// User's wallet address,
"0xdad9d86885d217b92a47370e1e785897dd09a4f3", /// User's wallet address,
"0x7d43aabc515c356145049227cee54b608342c0ad", /// Wrap token address/ ERC20 token address
"10000000000", /// Send amount in String
"5", /// Destination chain id
"1638862397751", /// Nonce
"4002", /// Source chain id
],
)
Since this function is an Ethereum on-chain transaction, the response is the corresponding transaction response.
Last modified 4mo ago