Send USDC from Hydration to EWX

Key facts you must know

• USDC uses 6 decimals.

  • 1 USDC = 1,000,000 base units.

• You will replace two fields before submitting:

  • the recipient public key (AccountId32)

  • the USDC amount (base units)

Safety tip: Do a small test first (e.g., 0.5–1 USDC) before sending a large amount.

Step 1: Check your USDC balance on Hydration (optional)

Open the Hydration explorer and paste your Hydration account address:

https://hydration.subscan.io/account/

Step 2: Open Polkadot.js "Decode call" on Hydration (transaction-enabled RPC)

Use this Polkadot.js Apps link (Hydration RPC):

https://polkadot.js.org/apps/?rpc=wss%3A%2F%2Fhydration.dotters.network#/extrinsics/decode

Step 3: Paste the pre-built hex call

In "hex-encoded call", paste this exact value:

0x89001600000020a107000000000000000000000000000401020045340100d43593c715fdd31c61141abd04a99fd6822c8558854ccde39a5684e7a56da27d00

This call is pre-built with Alice's address as the recipient for testing. You will replace it with your own recipient address in Step 5.

Verify (do not skip)

Confirm the decoded call shows:

• pallet: xTokens, call: transfer

• currencyId: 22 (USDC on Hydration)

• dest → Parachain 3345 (EWX), AccountId32

• destWeightLimit: Unlimited

• the amount field is present and editable

If anything looks different, STOP and do not sign.

Step 4: Get the recipient "hex public key" (32-byte AccountId32)

Open Polkadot.js Utilities on the Hydration RPC:

https://polkadot.js.org/apps/?rpc=wss%3A%2F%2Fhydration.dotters.network#/utilities

Choose the destination address

• If you are sending to the same wallet account on EWX, use your own address.

• If you are sending to a different EWX account, use that account's address.

Convert address → hex public key

In Utilities, use the tool that converts an address to hex (often labeled "Address to Hex"):

1. Paste the destination EWX address

2. Copy the output hex public key

It should look like:

• starts with 0x

• followed by 64 hex characters (32 bytes)

Step 5: Fill recipient + amount on the Submission tab

Go back to the Decode page and click Submission.

A) Paste the recipient public key

Find the field under dest:

• AccountId32 → id: [u8;32]

Paste the recipient hex public key (from Step 4).

B) Enter the USDC amount (base units)

Find:

• amount: u128

Enter the amount in base units (6 decimals):

USDC_to_send × 1,000,000 = base_units

Examples:

• 0.5 USDC → 500000

• 1 USDC → 1000000

• 10 USDC → 10000000

• 12.34 USDC → 12340000

Step 6: Submit the transaction

1. Click Submit Transaction

2. Approve/sign in your wallet

Step 7: Confirm on EWX explorer

After it processes, check the recipient address on the EWX explorer:

https://energywebx.subscan.io/account/

You should see the USDC balance on EWX.

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