How to Map MTR -> eMTR and MTRG -> eMTRG Using the Meter Wallet

March 19, 2021

NOTE: If you are looking for how to map eMTRG -> MTRG, click here.

Here is a step-by-step tutorial on how to use the Meter-Ethereum bridge in the Meter wallet to map our mainnet tokens to their ERC-20 equivalents.

Hello Methereans!

On Sunday, August 9, 2020, we listed eMTRG, the ERC20 version of MTRG, on Uniswap. This allowed ETH holders to acquire eMTRG.

The listing kicked off the first step in providing cross-chain interoperability between Meter and Ethereum. The availability of eMTR (the ERC20 version of our stablecoin MTR) and eMTRG will allow you to take part in Ethereum’s DeFI offerings, such as providing liquidity to the Uniswap pool, participating in our upcoming liquidity mining program, and much more. 

Please read on for important information about the bridge and a step-by-step tutorial on how to use it.

Details of the Meter-Ethereum bridge

First of all, please note that the bridge is still in Beta. Use it at your own risk. 

Here are the relevant addresses where token activity will occur:

And here are links to our tokens on Uniswap:

Over the first 6 months after launch, we will limit the capacity of the bridge to 1.5 million eMTR and 3 million eMTRG. The bridge will allow mapping of the initial 3M MTRG to eMTRG in the following amounts:

  • 30% of current circulating supply (~2.1M) = 630,000 MTRG (to be mapped by current MTRG holders on a first-come, first-served basis)
  • 30% of the Meter Foundation’s operations budget (4.9M) = 1.47M MTRG (already mapped for liquidity)
  • 30% of the Marketing/Community budget (3M) = 900,000 MTRG (already mapped for liquidity)

There may be limitations to how much MTRG can be mapped to eMTRG each week. We will release this information when this functionality is released. There will be no additional limitations aside from the ones mentioned above.

The limit of 3M MTRG mapped to eMTRG can be eventually increased via governance. There will be no long-term limit for MTR mapped to eMTR.

Because of the high cost of gas on the Ethereum side of the bridge, there will be a fee of 0.5% of the volume mapped (with a minimum fee of 10 MTRG or 20 MTR, depending on which coin you map) at this moment to avoid abuse of the bridge. Any transactions that attempt to pay transfer fees lower than 10 MTRG or 20 MTR will fail, and these fees will not be refunded.

Thus, it may only make sense to map your MTRG to eMTRG if you are seriously planning to participate in our liquidity mining program.

How to map MTR/MTRG to eMTR/eMTRG with your Meter wallet

Here are the steps you need to take to map your MTR to eMTR and MTRG to eMTRG:

1) If you haven’t already, download the Meter wallet and move the coins you want to map there. If you already have the Meter wallet, go to “Settings” and make sure you are using version 1.2.0 or above. If not, click “Check” to upgrade. Please note that you will have to buy some MTR to pay gas fees to map your MTR/MTRG to eMTR/eMTRG (currently at 0.0105 MTR per transaction), and you may also need some to move your coins from exchanges to the Meter wallet.

2) Before using the bridge, you will need to back up your Meter wallet and import it to an ETH wallet (such as Metamask); eMTRG and eMTR will be mapped to the same address by the bridge. Here are instructions to do so:

a) Open the Meter wallet app and click into your wallet

b) Click “Backup” in the submenu toward the top of your wallet. Then enter your password when prompted.

c) Your keystore will appear in a modal. Click “Save” and save it to your computer. 

d) We will use Metamask as our ETH wallet for this example. Open up Metamask, log in, click on the favicon in the upper right corner, and click “Import Account”. 

e) In the “Select Type” dropdown, choose “JSON File”. 

f) Click the “Choose File” button and select the keystore file you recently saved.

g) Enter the password of your Meter wallet (not your Metamask password), then click the “Import” button. 

h) You should see a new wallet appear in Metamask with an “imported” note next to it. Make sure the imported wallet address is the same as your Meter wallet address. 

i) Next you’ll have to add the eMTR and eMTRG tokens to the Account you just imported. Click into the account, and click the “Add Token” button at the bottom. 

j) Click on the “Custom Token” tab.

k) Copy and paste the contract address into the Token Contract Address field - 0x29e9fdf5933824ad21bc6dbb8bf156efa3735e32 for eMTR, 0xBd2949F67DcdC549c6Ebe98696449Fa79D988A9F for eMTRG. The other fields will auto-populate. Click the “Next” button.

l) Metamask will then confirm that you want to add the token. Click “Add Tokens”.

m) Once you click back to the main imported account screen, you will see the added token. 

You can repeat steps 2i-2m for the other Meter ERC20 token you haven’t added yet.

3) Now that you’ve imported your Meter wallet to an ETH wallet and added the tokens, return to the Meter wallet. In the upper left corner of the wallet app, click “Bridge”.

4) Please read the Bridge Exchange Rules and disclaimer carefully before executing an exchange.

5) Enter the amount of MTR or MTRG you would like to map to eMTR or eMTRG, respectively. Select the appropriate token in the dropdown to the right of the amount. 

6) Click the “Send” button. 

7) The Meter wallet will show you the details of the transaction. Click the “Next” button. 

7) Enter your password then click the “Sign” button. 

8) The wallet will then confirm your transaction. You can view the transaction details by navigating back into your wallet and clicking on the “Load” button. 

9) This will bring up your recent transactions. You can click on “Trade Details” to see the details of your bridge transaction.

10) The details of your bridge transaction will be displayed in a new tab in the Meter wallet. You can click on the link next to “Inbound Transaction” to display information of the transaction sent to the bridge. The link next to “Outbound Transaction” will send you to an Etherscan page with the Ethereum transaction details. 

11) You should then see your eMTR or eMTRG in your ETH wallet within a few minutes. Now you’re a Metherian!

If you run into any issues, please save your Meter network transaction hash and contact us on our Telegram group or Discord server.


We’re excited to launch the Meter-Ethereum bridge!

This bridge will be the foundation of our liquidity mining program and bring the Meter and Ethereum DeFi worlds closer together.

Thanks for your support!

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