From d2a66867d8e5c140c8f5d60f76a679241dde9eba Mon Sep 17 00:00:00 2001 From: jjy Date: Mon, 23 Oct 2023 14:19:36 +0800 Subject: [PATCH] store denom trace mapping --- contracts/apps/20-transfer/ICS20TransferERC20.sol | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) diff --git a/contracts/apps/20-transfer/ICS20TransferERC20.sol b/contracts/apps/20-transfer/ICS20TransferERC20.sol index cf7b19a..c72443c 100644 --- a/contracts/apps/20-transfer/ICS20TransferERC20.sol +++ b/contracts/apps/20-transfer/ICS20TransferERC20.sol @@ -12,6 +12,8 @@ import "@openzeppelin/contracts/token/ERC20/presets/ERC20PresetMinterPauser.sol" contract ICS20TransferERC20 is ICS20Transfer { // Map sink denom to ERC20. mapping(string => ERC20PresetMinterPauser) public denomTokenContract; + // Map denom hash to denom full path + mapping(bytes32 => string) public denomTraces; constructor(IBCHandler ibcHandler_) ICS20Transfer(ibcHandler_) { } @@ -33,8 +35,14 @@ contract ICS20TransferERC20 is ICS20Transfer { function _mint(address account, string memory denom, uint256 amount) internal virtual override returns (bool) { // Deploy an ERC20 contract for each (sink zone) denom seen. if (address(denomTokenContract[denom]) == address(0)) { - string memory name = string.concat("IBC/", hexEncode(abi.encodePacked(sha256(bytes(denom))))); + bytes32 dh = sha256(bytes(denom)); + string memory name = string.concat("IBC/", hexEncode(abi.encodePacked(dh))); denomTokenContract[denom] = new ERC20PresetMinterPauser(name, ""); + // store denomTrace(hash -> denom) + bytes memory denomTrace = bytes(denomTraces[dh]); // Uses memory + if (denomTrace.length == 0) { + denomTraces[dh] = denom; + } } denomTokenContract[denom].mint(account, amount); return true;