$GWEI Bridge Instructions

These instructions cover manual (contract-level) token bridging via Wormhole. While this provides zero bridge fee, full control, and transparency, it requires multiple steps and careful input handling.

Most users may prefer UI-based bridge providers such as https://portalbridge.com, inputting the $GWEI contract address directly, automating this process, and offering a simpler, safer experience, but charging a fee for their service.

$GWEI Token Addresses

• Ethereum Mainnet: 0x2798b1cC5A993085E8A9D46e80499F1B63f42204

• BSC: 0x30117E4bC17d7B044194b76A38365C53b72F7D49

$GWEI Bridge Instructions

Bridging from BSC -> Ethereum

1. On BSC chain, approve GWEI token for wormhole tokebridge: 0xb6f6d86a8f9879a9c87f643768d9efc38c1da6e7

2. Call wormhole tokebridge 0xb6f6d86a8f9879a9c87f643768d9efc38c1da6e7 transferTokens() according to https://wormhole.com/docs/products/token-transfers/wrapped-token-transfers/guides/wtt-contracts/#transfer-tokens

   1. token is the GWEI address 0x30117E4bC17d7B044194b76A38365C53b72F7D49

   2. recipientChain ID for ETH is 2 according to https://wormhole.com/docs/products/reference/chain-ids

   3. recipient must be in bytes32 format, for example if your address is 0xf1357d45671CB16dE055752809C8d2e3aB4AfE2e then you should input 0x000000000000000000000000f1357d45671cb16de055752809c8d2e3ab4afe2e

   4. arbiterFee can be set to 0

   5. nonce can start with 0

   6. Example tx: https://bscscan.com/tx/0x566b40c9e9f1cd4d90274a889ab07d0e4b2717eb988512dd60ce7c468060579f

3. Search your tx hash on https://wormholescan.io and wait for around 1-2 min

4. On the Ethereum chain, call wormhole tokenbridge 0x3ee18b2214aff97000d974cf647e7c347e8fa585 completeTransfer with input data from the below:

   1. Get the VAA bytes from https://wormhole.com/docs/products/token-transfers/wrapped-token-transfers/guides/fetch-signed-vaa, remember to put 0x before the hex data

      1. Or, open the terminal and run echo "<raw-vaa>" | base64 --decode | xxd -p -c 9999 where "<raw-vaa>" refers to the vaa data found in the advanced tab of the wormhole explorer page

   2. Example tx: https://etherscan.io/tx/0x27993971f2548908178c2e2e6761279e0eb204f64c3db0b724107c33a4d1cf01

Bridging from Ethereum -> BSC

1. On the Ethereum chain, approve GWEI token for wormhole tokebridge 0x3ee18b2214aff97000d974cf647e7c347e8fa585

2. Call wormhole tokebridge 0x3ee18b2214aff97000d974cf647e7c347e8fa585 transferTokens() according to https://wormhole.com/docs/products/token-transfers/wrapped-token-transfers/guides/wtt-contracts/#transfer-tokens

   1. token is the GWEI address 0x2798b1cC5A993085E8A9D46e80499F1B63f42204

   2. recipientChain ID for BSC is 4 according to https://wormhole.com/docs/products/reference/chain-ids/

   3. recipient must be in bytes32 format, for example if your address is 0xf1357d45671CB16dE055752809C8d2e3aB4AfE2e then you should input 0x000000000000000000000000f1357d45671cb16de055752809c8d2e3ab4afe2e

   4. arbiterFee can be set to 0

   5. nonce can start with 0

   6. Example tx: https://etherscan.io/tx/0x2afbaf839d3e17a128f315e75f8fb69a3ff3bb33e491538f88e150e905bc9e11

3. Search your tx hash on https://wormholescan.io and wait for around 18-20 min

4. On BSC chain, call wormhole tokenbridge 0xb6f6d86a8f9879a9c87f643768d9efc38c1da6e7 completeTransfer with input data from the below

   1. Get the VAA bytes from https://wormhole.com/docs/products/token-transfers/wrapped-token-transfers/guides/fetch-signed-vaa, remember to put 0x before the hex data

      1. Or, open the terminal and run echo "<raw-vaa>" | base64 --decode | xxd -p -c 9999 where "<raw-vaa>" refers to the vaa data found in the advanced tab of the wormhole explorer page

   2. Example tx: https://bscscan.com/tx/0xd96cbbdb8dbe47185a27c264196d633a043475465f5150b23ab11a7f1c2261a0