-
Notifications
You must be signed in to change notification settings - Fork 241
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
Problem: bi-directional token conversion is not implemented (#600)
- Loading branch information
1 parent
85163e4
commit ca819e5
Showing
35 changed files
with
1,008 additions
and
254 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,34 +1,104 @@ | ||
| pragma solidity ^0.6.8; | ||
| pragma solidity ^0.6.1; | ||
|
|
||
| import "./ModuleCRC20.sol"; | ||
| import "ds-token/token.sol"; | ||
|
|
||
| contract ModuleCRC21 is ModuleCRC20 { | ||
| contract ModuleCRC21 is DSToken { | ||
| // sha256('cronos-evm')[:20] | ||
| address constant module_address = 0x89A7EF2F08B1c018D5Cc88836249b84Dd5392905; | ||
| string denom; | ||
| bool isSource; | ||
|
|
||
| event __CronosSendToIbc(address sender, string recipient, uint256 amount); | ||
| event __CronosSendToChain(address sender, address recipient, uint256 amount, uint256 bridge_fee, uint256 chain_id); | ||
| event __CronosCancelSendToChain(address sender, uint256 id); | ||
|
|
||
| constructor(string memory denom_, uint8 decimals_) ModuleCRC20(denom_, decimals_) public { | ||
| constructor(string memory denom_, uint8 decimals_, bool isSource_) DSToken(denom_) public { | ||
| decimals = decimals_; | ||
| denom = denom_; | ||
| isSource = isSource_; | ||
| } | ||
|
|
||
| // make unsafe_burn internal | ||
| function unsafe_burn_internal(address addr, uint amount) internal { | ||
| // Deduct user's balance without approval | ||
| require(balanceOf[addr] >= amount, "ds-token-insufficient-balance"); | ||
| balanceOf[addr] = sub(balanceOf[addr], amount); | ||
| totalSupply = sub(totalSupply, amount); | ||
| emit Burn(addr, amount); | ||
| /** | ||
| views | ||
| **/ | ||
| function native_denom() public view returns (string memory) { | ||
| return denom; | ||
| } | ||
|
|
||
| function is_source() public view returns (bool) { | ||
| return isSource; | ||
| } | ||
|
|
||
|
|
||
| /** | ||
| Internal functions to be called by cronos module | ||
| **/ | ||
| function mint_by_cronos_module(address addr, uint amount) public { | ||
| require(msg.sender == module_address); | ||
| mint(addr, amount); | ||
| } | ||
|
|
||
| function burn_by_cronos_module(address addr, uint amount) public { | ||
| require(msg.sender == module_address); | ||
| unsafe_burn(addr, amount); | ||
| } | ||
|
|
||
| function transfer_by_cronos_module(address addr, uint amount) public { | ||
| require(msg.sender == module_address); | ||
| unsafe_transfer(addr, module_address, amount); | ||
| } | ||
|
|
||
| function transfer_from_cronos_module(address addr, uint amount) public { | ||
| transferFrom(module_address, addr, amount); | ||
| } | ||
|
|
||
| /** | ||
| Evm hooks functions | ||
| **/ | ||
|
|
||
| // send an "amount" of the contract token to recipient through IBC | ||
| function send_to_ibc(string memory recipient, uint amount) public { | ||
| if (isSource) { | ||
| transferFrom(msg.sender, module_address, amount); | ||
| } else { | ||
| unsafe_burn(msg.sender, amount); | ||
| } | ||
| emit __CronosSendToIbc(msg.sender, recipient, amount); | ||
| } | ||
|
|
||
| // send to another chain through gravity bridge | ||
| function send_to_chain(address recipient, uint amount, uint bridge_fee, uint chain_id) external { | ||
| unsafe_burn_internal(msg.sender, add(amount, bridge_fee)); | ||
| if (isSource) { | ||
| transferFrom(msg.sender, module_address, add(amount, bridge_fee)); | ||
| } else { | ||
| unsafe_burn(msg.sender, add(amount, bridge_fee)); | ||
| } | ||
| emit __CronosSendToChain(msg.sender, recipient, amount, bridge_fee, chain_id); | ||
| } | ||
|
|
||
| // cancel a send to chain transaction considering if it hasnt been batched yet. | ||
| function cancel_send_to_chain(uint256 id) external { | ||
| emit __CronosCancelSendToChain(msg.sender, id); | ||
| } | ||
|
|
||
| /** | ||
| Internal functions | ||
| **/ | ||
|
|
||
| // unsafe_burn burn tokens without user's approval and authentication, used internally | ||
| function unsafe_burn(address addr, uint amount) internal { | ||
| // Deduct user's balance without approval | ||
| require(balanceOf[addr] >= amount, "ds-token-insufficient-balance"); | ||
| balanceOf[addr] = sub(balanceOf[addr], amount); | ||
| totalSupply = sub(totalSupply, amount); | ||
| emit Burn(addr, amount); | ||
| } | ||
|
|
||
| // unsafe_transfer transfer tokens without user's approval and authentication, used internally | ||
| function unsafe_transfer(address src, address dst, uint amount) internal { | ||
| require(balanceOf[src] >= amount, "ds-token-insufficient-balance"); | ||
| balanceOf[src] = sub(balanceOf[src], amount); | ||
| balanceOf[dst] = add(balanceOf[dst], amount); | ||
| emit Transfer(src, dst, amount); | ||
| } | ||
| } |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Oops, something went wrong.