OKB X Layer

Overview

OKB X Layer is a Layer 2 scaling solution built on top of the Ethereum blockchain. It is powered by the Polygon CDK (Chain Development Kit) and uses ZK-rollup technology to deliver fast, low-cost transactions while inheriting Ethereum's security. OKB X Layer uses OKB as its native gas token. The X Layer Sepolia testnet uses chain ID 195. It utilizes:

• Account model
• EcDSA signature algorithm

OKB X Layer supports both legacy and TSS (Threshold Signature Scheme) transfers.

Explorer

Wallets Types

BitGo enables holding OKB X Layer in the following wallet types:

Ticker Symbols

Faucet

You can use a faucet to obtain free testnet OKB X Layer for development and testing purposes.

Faucet: https://www.okx.com/xlayer/faucet

Units

Each OKB X Layer is comprised of 1,000,000,000,000,000,000 (1018) wei, so not even a single OKB X Layer can be stored numerically without exceeding the range of JavaScript numbers. Gas fees are denoted in gwei.

• 1 OKB X Layer = 1018 wei
• 1 wei = 10-18 OKB X Layer
• 1 gwei = 10-9 OKB X Layer

For that reason, only string balance properties are available, which are balanceString, confirmedBalanceString, and spendableBalanceString.

Tokens

The OKB X Layer blockchain natively supports tokens. To view all BitGo supported tokens on the OKB X Layer Mainnet, see the OKB X Layer - ERC20 Tokens.

Fees

OKB X Layer supports both legacy (eth_gasPrice) and EIP-1559 (eth_feeHistory) gas estimation. OKB X Layer uses OKB as the gas token for transaction fees.

OKB X Layer's gas costs are typically very low. The base fee is the minimum price per unit of gas that a transaction must pay to be included in a block. Transactions must specify a maximum base fee higher than the block base fee to be included. The actual fee charged is the block base fee, even if the transaction specifies a higher maximum base fee.

The sequencer prioritizes transactions on a first-come first-served basis. Because priority fees do not make sense in this model, they are ignored. OKB X Layer users always just pay the base fee regardless of the tip they choose.

Create Wallet

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export BITGO_EXPRESS_HOST="<YOUR_LOCALHOST>"
export COIN="tokbxlayer"
export ACCESS_TOKEN="<YOUR_ACCESS_TOKEN>"
export LABEL="<DESIRED_WALLET_NAME>"
export PASSPHRASE="<YOUR_BITGO_LOGIN_PASSPHRASE>"
export ENTERPRISE_ID="<YOUR_ENTERPRISE_ID>"

curl -X POST \
 http://$BITGO_EXPRESS_HOST/api/v2/$COIN/wallet/generate \
 -H 'Content-Type: application/json' \
 -H "Authorization: Bearer $ACCESS_TOKEN" \
  -d '{
    "label": "'"$LABEL"'",
    "passphrase": "'"$PASSPHRASE"'",
    "enterprise": "'"$ENTERPRISE_ID"'",
    "walletVersion": 4
}'

Create Address

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export WALLET="585c51a5df8380e0e3082e46"
export ACCESS_TOKEN="<YOUR_ACCESS_TOKEN>"

curl -X POST \
-H "Authorization: Bearer $ACCESS_TOKEN" \
https://app.bitgo-test.com/api/v2/tokbxlayer/wallet/$WALLET/address

Consolidate Balance

Consolidation Fee Source: OKB X Layer Gas Tank

OKB X Layer uses forwarders, so it does not support manual consolidation.

Estimate Fee

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export COIN="tokbxlayer"
export ACCESS_TOKEN="<YOUR_ACCESS_TOKEN>"

curl -X GET \
 https://app.bitgo-test.com/api/v2/$COIN/tx/fee \
 -H 'Content-Type: application/json' \
 -H "Authorization: Bearer $ACCESS_TOKEN"

Transact

Withdrawal Fee Source: Wallet Base Address

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export BITGO_EXPRESS_HOST="<YOUR_LOCALHOST>"
export COIN="tokbxlayer"
export WALLET_ID="<YOUR_WALLET_ID>"
export ACCESS_TOKEN="<YOUR_ACCESS_TOKEN>"
export ADDRESS="<DESTINATION_ADDRESS>"
export AMOUNT="<AMOUNT_IN_BASE_UNITS>"
export WALLET_PASSPHRASE="<YOUR_WALLET_PASSPHRASE>"

curl -X POST \
 http://$BITGO_EXPRESS_HOST/api/v2/$COIN/wallet/$WALLET_ID/sendcoins \
  -H 'Content-Type: application/json' \
  -H "Authorization: Bearer $ACCESS_TOKEN" \
  -d '{
    "address": "'"$ADDRESS"'",
    "amount": "'"$AMOUNT"'",
    "walletPassphrase": "'"$WALLET_PASSPHRASE"'"
}'

Stake

OKB X Layer isn't a stakeable asset.

See Also

• OKB X Layer - ERC20 Tokens