Test in Remix

Open MetaMask, connect to Ropsten, and import an account with some Testnet ETH to pay for gas costs
Go to https://remix.ethereum.org/#appVersion=0.7.7&optimize=false&version=soljson-v0.5.16+commit.9c3226ce.js
Open the directory and choose all relevant Lockdrop related smart contracts (the ones in this PR https://github.com/DataHighway-DHX/mining/pull/11/files)
Change all the imports so they are importing from the same browser-based directory:
- i.e. change import "./lib/ERC20.sol"; to import "./ERC20.sol";
Go to "Compile" > "Start Compile". Fix any compiler errors
Go to "Run"
- choose Environment "Injected Web3 Ropsten"
- choose Account ""
- choose Gas Limit "3000000"
- choose Value "20" Gwei
- Choose:
  - Lockdrop
  - Enter for startTime: 1592493571 (get current Epoch time from https://www.epochconverter.com/)
  - Click "Transact" button
- Alternatively:
  - Paste the address where the Lockdrop contract was deployed to on Ropsten into "At Address"
    - Click the "At Address" text button
- In the MetaMask popup, click to "Edit" the "Gas Price", then click "Advanced", and enter Gas Price: 42, and Gas Limit: 3339875
- In the "Deployed Contracts" section, click to expand "Lockdrop at 0x...."

Convert the DataHighway Address to Hex and then to Bytes

truffle console --network ropsten --verbose-rpc
const res = web3.utils.utf8ToHex("<DATAHIGHWAY_PUBLIC_KEY")

Note: It doesn't appear necessary to then run web3.utils.hexToBytes(res)

In Remix, paste that hex value in value for key dataHighwayPublicKey when calling the smart contract. 0x2768fdab1c89b4cfcabd9aff80d87ece0d496a39
Transact "signal" function:
- Paste value: "3","100","0x46765939697a514462737a7a46556b437a65643435547039785062754b4e516e4d563150676b385959444b43573476","0x2768fdab1c89b4cfcabd9aff80d87ece0d496a39"
- OR "signalFromContract": "0x1f7ace08af5c49a5d69fbb98fb9339a729b27161","1","3","100","0x46765939697a514462737a7a46556b437a65643435547039785062754b4e516e4d563150676b385959444b43573476","0x2768fdab1c89b4cfcabd9aff80d87ece0d496a39"
- Click "transact" button
- Choose 30 Gwei and 75000 Gas Limit
- Successfully works!

Call "signalWalletStructs":

Paste value: "0x1f7ace08af5c49a5d69fbb98fb9339a729b27161","0x2768fdab1c89b4cfcabd9aff80d87ece0d496a39"
Click "call" button

Success - it returns (if it failed it'd return 0: address[]:)

0: uint8: claimStatus 0
1: uint256: approvedTokenERC20Amount 0
2: uint8: term 3
3: uint256: tokenERC20Amount 100
4: bytes: dataHighwayPublicKey 0x46765939697a514462737a7a46556b437a65643435547039785062754b4e516e4d563150676b385959444b43573476
5: address: contractAddr 0x0000000000000000000000000000000000000000
6: uint32: nonce 0
7: uint256: createdAt 1592554374

transact "setClaimStatus", to Approve it (i.e. "1")
- Paste value: "0x1f7ace08af5c49a5d69fbb98fb9339a729b27161","1","0x2768fdab1c89b4cfcabd9aff80d87ece0d496a39","1","100"
- Click "transact" button
- SOLVED - it works if replace using StandardToken token = StandardToken ... with ERC20 token = ERC20 ...for some reason.
Call "signalWalletStructs" again to check it's Approved with correct amount
- Paste value: "0x1f7ace08af5c49a5d69fbb98fb9339a729b27161","0x2768fdab1c89b4cfcabd9aff80d87ece0d496a39"
- Click "call" button
- Success - it returns (if it failed it'd return 0: address[]:)
```
0: uint8: claimStatus 1
1: uint256: approvedTokenERC20Amount 100
...
```
- IMPORTANT: Ensure that you have deployed the MXCToken to the tokenContractAddress and on the network that you're using (i.e. Ropsten, or Rinkeby). If you try to run the above and enter the wrong ERC20 token (e.g. MXCToken), then the transaction will fail with unknown error
Transact "lock" function:
- Paste value: "0x1f7ace08af5c49a5d69fbb98fb9339a729b27161","3","100","0x46765939697a514462737a7a46556b437a65643435547039785062754b4e516e4d563150676b385959444b43573476","0x2768fdab1c89b4cfcabd9aff80d87ece0d496a39",false
- Click button "lock" (use at least 600,000 Gas)
- FAILS - when it runs token.transfer( ... it crashes in Remix e.g. https://rinkeby.etherscan.io/tx/0x5dce9e2adb20316171d4fc7634c933fd5adebf8cbb04952b02daef0f5244a1cd

ltfschoen/lockdrop-setup.md

Test in Remix