Gas Optimizations

[code423n4]

1. Short reason string can be used for saving more gas

Every reason string takes at least 32 bytes. Use short reason strings that fits in 32 bytes or it will become more expensive.

main/contracts/dnssec-oracle/RRUtils.sol#L307  "Long keys not permitted"
main/contracts/wrapper/Controllable.sol#L17 "Controllable: Caller is not a controller"
main/contracts/wrapper/BytesUtil.sol#L28  "namehash: Junk at end of name"
main/contracts/wrapper/BytesUtil.sol#L42 "readLabel: Index out of bounds"
main/contracts/wrapper/ERC1155Fuse.sol#L62 "ERC1155: balance query for the zero address"
main/contracts/wrapper/ERC1155Fuse.sol#L87 "ERC1155: accounts and ids length mismatch"
main/contracts/wrapper/ERC1155Fuse.sol#L109 "ERC1155: setting approval status for self"
main/contracts/wrapper/ERC1155Fuse.sol#L176 "ERC1155: transfer to the zero address"
main/contracts/wrapper/ERC1155Fuse.sol#L179 "ERC1155: caller is not owner nor approved"
main/contracts/wrapper/ERC1155Fuse.sol#L197"ERC1155: ids and amounts length mismatch"
main/contracts/wrapper/ERC1155Fuse.sol#L199 "ERC1155: transfer to the zero address"
main/contracts/wrapper/ERC1155Fuse.sol#L202 "ERC1155: transfer caller is not owner nor approved"
main/contracts/wrapper/ERC1155Fuse.sol#L217 "ERC1155: insufficient balance for transfer"
main/contracts/wrapper/ERC1155Fuse.sol#L322 "ERC1155: ERC1155Receiver rejected tokens"
main/contracts/wrapper/ERC1155Fuse.sol#L327 "ERC1155: transfer to non ERC1155Receiver implementer"
main/contracts/wrapper/ERC1155Fuse.sol#L354 "ERC1155: ERC1155Receiver rejected tokens"
main/contracts/wrapper/ERC1155Fuse.sol#L359 "ERC1155: transfer to non ERC1155Receiver implementer"

2. Using count++ can saving more gas

https://github.com/code-423n4/2022-07-ens/blob/ff6e59b9415d0ead7daf31c2ed06e86d9061ae22/contracts/dnssec-oracle/RRUtils.sol#L58

3. Saving gas by removing = 0

This implementation code can be saving more gas by removing = 0, it because If a variable was not set/initialized, it is assumed to have default value to 0

https://github.com/code-423n4/2022-07-ens/blob/ff6e59b9415d0ead7daf31c2ed06e86d9061ae22/contracts/wrapper/ERC1155Fuse.sol#L145
https://github.com/code-423n4/2022-07-ens/blob/ff6e59b9415d0ead7daf31c2ed06e86d9061ae22/contracts/dnssec-oracle/BytesUtils.sol#L264

4. change uint256 i = 0 into uint i for saving more gas

using this implementation can saving more gas for each loops.

/main/contracts/wrapper/ERC1155Fuse.sol#L92         for (uint256 i = 0; i < accounts.length; ++i) {
/main/contracts/wrapper/ERC1155Fuse.sol#L205         for (uint256 i = 0; i < ids.length; ++i) {
 /main/contracts/dnssec-oracle/BytesUtils.sol#L266        for(uint i = 0; i < len; i++) {