ETH Price: $3,108.64 (-0.07%)
Gas: < 0.000001 Gwei

Transaction Details

Transaction Action
Aggregated Transfer of 2 NFTs
Across 1 Token
Transaction Hash:
0xbde701a5d7e4c6c6ccd0a7cc7c4a6e063fa2c8a5654527968d0c7614c35cfdc9
Status:
Success
Block:
18381036 Confirmed by Sequencer
Timestamp:
34 hrs ago (Dec-07-2025 04:10:47 PM +UTC)
From:
0xcC74f5D7F2071f08aAAF5cF0c385b30367d8f3Df
Interacted With (To):
0x5aCb2eC8E7755366e0F23df4579CB5cFaf14715c
Internal Transactions:
ERC-20 Tokens Transferred: 23
ERC-721 Tokens Transferred: 2
Value:
0 ETH ($0.00)
Transaction Fee:
0.000001387156356734 ETH
Gas Price:
0.000000263 Gwei (263 wei)
ETH Price:
$3,060.97 / ETH
Gas Limit & Usage by Txn:
2,699,028 | 1,494,448 (55.37%)
Gas Fees:
Base: 0.000000262 Gwei |Max: 0.000000263 Gwei |Max Priority: 0.000000001 Gwei
Operator Fee Scalar:
0
Operator Fee Constant:
0.000001351351351351 ETH
L2 Fees Paid:
0.000000000393039824 ETH
L1 Fees Paid:
0.000000035411965559 ETH
L1 Gas Price:
0.000000000435216918 ETH (0.435216918 Gwei)
L1 Gas Used by Txn:
19,408
L1 Fee Scalar:
0
Other Attributes:
Txn Type: 2 (EIP-1559) Nonce: 4 Position In Block: 1
Input Data:
Private Note:
To access the Private Note feature, you must be Logged In

The contract call From 0xcC74f5D7...367d8f3Df To 0x5aCb2eC8...Faf14715c produced 2 Internal Transactions

ADVANCED MODE:
  Type Trace Address From   To Value Gas Limit
call_0_1_1_1_1_1_1VaultBridge: vbETH Token 0x3388a64d...3d49971Aa0.000170954381593295 ETH2,300
call_0_1_1_1_10x3388a64d...3d49971Aa 0xd4627eCb...55590c83D0.000001538589434339 ETH2,036,993
AA Txn Hash Method Position From Internal Txns Token Txns NFT Txns Txn Fee (ETH) Gas Limit
Transaction Receipt Event Logs
0
Address
0x3ef3d8ba38ebe18db133cec108f4d14ce00dd9ae
Name

Claimed (index_topic_1 address user, index_topic_2 address token, uint256 amount)View Source

Topics
Data
  • amount :257388699709965419478
1
Address
0x7f1f4b4b29f5058fa32cc7a97141b8d7e5abdc2d (Katana: KAT Token)
Name

Transfer (index_topic_1 address from, index_topic_2 address to, uint256 value)View Source

Topics
Data
  • value :257388699709965419478
2
Address
0x6e9c1f88a960fe63387eb4b71bc525a9313d8461
Name

Transfer (index_topic_1 address from, index_topic_2 address to, uint256 value)View Source

Topics
Data
  • value :257388699709965419478
3
Address
0x6e9c1f88a960fe63387eb4b71bc525a9313d8461
Name

Transfer (index_topic_1 address from, index_topic_2 address to, uint256 value)View Source

Topics
Data
  • value :257388699709965419478
4
Address
0x5ee63f441aa80e8c8d3ba80df8371754c052b027
Name

Burn (index_topic_1 address owner, index_topic_2 int24 tickLower, index_topic_3 int24 tickUpper, uint128 amount, uint256 amount0, uint256 amount1)View Source

Topics
Data
  • amount :0
  • amount0 :0
  • amount1 :0
5
Address
0x2dca96907fde857dd3d816880a0df407eeb2d2f2 (VaultBridge: vbUSDT Token)
Name

Transfer (index_topic_1 address from, index_topic_2 address to, uint256 value)View Source

Topics
Data
  • value :350999
6
Address
0xee7d8bcfb72bc1880d0cf19822eb0a2e6577ab62 (VaultBridge: vbETH Token)
Name

Transfer (index_topic_1 address from, index_topic_2 address to, uint256 value)View Source

Topics
Data
  • value :172506944090105
7
Address
0x5ee63f441aa80e8c8d3ba80df8371754c052b027
Name

Collect (index_topic_1 address owner, address recipient, index_topic_2 int24 tickLower, index_topic_3 int24 tickUpper, uint128 amount0, uint128 amount1)View Source

Topics
Data
  • recipient :0x3388a64dC6e1c0DfE7EC965aaA928dC3d49971Aa
  • amount0 :350999
  • amount1 :172506944090105
8
Address
0x2659c6085d26144117d904c46b48b6d180393d27 (SushiSwap V3: Position Manager)
Name

Collect (index_topic_1 uint256 tokenId, address recipient, uint256 amount0, uint256 amount1)View Source

Topics
  • 0 0x40d0efd1a53d60ecbf40971b9daf7dc90178c3aadc7aab1765632738fa8b8f01
  • 1: tokenId 96471
Data
  • recipient :0x3388a64dC6e1c0DfE7EC965aaA928dC3d49971Aa
  • amount0 :350999
  • amount1 :172506944090105
9
Address
0x2dca96907fde857dd3d816880a0df407eeb2d2f2 (VaultBridge: vbUSDT Token)
Name

Transfer (index_topic_1 address from, index_topic_2 address to, uint256 value)View Source

Topics
Data
  • value :3158
10
Address
0x3388a64dc6e1c0dfe7ec965aaa928dc3d49971aa
Name

FeeCharged (address strategy, bytes4 feeDescriptor, uint256 amount, address token)View Source

Topics
  • 0 0x20637f693d80799c8bf08f5bf9614910f0106e0f0d787852fcd247b514b5f1ee
Data
11
Address
0xee7d8bcfb72bc1880d0cf19822eb0a2e6577ab62 (VaultBridge: vbETH Token)
Name

Transfer (index_topic_1 address from, index_topic_2 address to, uint256 value)View Source

Topics
Data
  • value :1552562496810
12
Address
0x3388a64dc6e1c0dfe7ec965aaa928dc3d49971aa
Name

FeeCharged (address strategy, bytes4 feeDescriptor, uint256 amount, address token)View Source

Topics
  • 0 0x20637f693d80799c8bf08f5bf9614910f0106e0f0d787852fcd247b514b5f1ee
Data
13
Address
0xee7d8bcfb72bc1880d0cf19822eb0a2e6577ab62 (VaultBridge: vbETH Token)
Name

Transfer (index_topic_1 address from, index_topic_2 address to, uint256 value)View Source

Topics
Data
  • value :170954381593295
14
Address
0xee7d8bcfb72bc1880d0cf19822eb0a2e6577ab62 (VaultBridge: vbETH Token)
Name

Withdrawal (index_topic_1 address to, uint256 value)View Source

Topics
Data
  • value :170954381593295
15
Address
0x3388a64dc6e1c0dfe7ec965aaa928dc3d49971aa
Name

FeeCharged (address strategy, bytes4 feeDescriptor, uint256 amount, address token)View Source

Topics
  • 0 0x20637f693d80799c8bf08f5bf9614910f0106e0f0d787852fcd247b514b5f1ee
Data
16
Address
0x2dca96907fde857dd3d816880a0df407eeb2d2f2 (VaultBridge: vbUSDT Token)
Name

Transfer (index_topic_1 address from, index_topic_2 address to, uint256 value)View Source

Topics
Data
  • value :347841
17
Address
0x5acb2ec8e7755366e0f23df4579cb5cfaf14715c
Name

SickleHarvestedNft (index_topic_1 address sickle, index_topic_2 address nft, index_topic_3 uint256 tokenId, address stakingContract, uint256 poolIndex)View Source

Topics
Data
18
Address
0x5acb2ec8e7755366e0f23df4579cb5cfaf14715c
Name

SickleWithdrewNft (index_topic_1 address sickle, index_topic_2 address nft, index_topic_3 uint256 tokenId, address stakingContract, uint256 poolIndex)View Source

Topics
Data
19
Address
0x5ee63f441aa80e8c8d3ba80df8371754c052b027
Name

Burn (index_topic_1 address owner, index_topic_2 int24 tickLower, index_topic_3 int24 tickUpper, uint128 amount, uint256 amount0, uint256 amount1)View Source

Topics
Data
  • amount :74174709955406
  • amount0 :0
  • amount1 :28061922002431212
20
Address
0x2659c6085d26144117d904c46b48b6d180393d27 (SushiSwap V3: Position Manager)
Name

DecreaseLiquidity (index_topic_1 uint256 tokenId, uint128 liquidity, uint256 amount0, uint256 amount1)View Source

Topics
  • 0 0x26f6a048ee9138f2c0ce266f322cb99228e8d619ae2bff30c67f8dcf9d2377b4
  • 1: tokenId 96471
Data
  • liquidity :74174709955406
  • amount0 :0
  • amount1 :28061922002431212
21
Address
0xee7d8bcfb72bc1880d0cf19822eb0a2e6577ab62 (VaultBridge: vbETH Token)
Name

Transfer (index_topic_1 address from, index_topic_2 address to, uint256 value)View Source

Topics
Data
  • value :28061922002431212
22
Address
0x5ee63f441aa80e8c8d3ba80df8371754c052b027
Name

Collect (index_topic_1 address owner, address recipient, index_topic_2 int24 tickLower, index_topic_3 int24 tickUpper, uint128 amount0, uint128 amount1)View Source

Topics
Data
  • recipient :0x3388a64dC6e1c0DfE7EC965aaA928dC3d49971Aa
  • amount0 :0
  • amount1 :28061922002431212
23
Address
0x2659c6085d26144117d904c46b48b6d180393d27 (SushiSwap V3: Position Manager)
Name

Collect (index_topic_1 uint256 tokenId, address recipient, uint256 amount0, uint256 amount1)View Source

Topics
  • 0 0x40d0efd1a53d60ecbf40971b9daf7dc90178c3aadc7aab1765632738fa8b8f01
  • 1: tokenId 96471
Data
  • recipient :0x3388a64dC6e1c0DfE7EC965aaA928dC3d49971Aa
  • amount0 :0
  • amount1 :28061922002431212
24
Address
0x2659c6085d26144117d904c46b48b6d180393d27 (SushiSwap V3: Position Manager)
Name

Approval (index_topic_1 address owner, index_topic_2 address approved, index_topic_3 uint256 tokenId)View Source

Topics
Data
    0x
25
Address
0x2659c6085d26144117d904c46b48b6d180393d27 (SushiSwap V3: Position Manager)
Name

Transfer (index_topic_1 address from, index_topic_2 address to, index_topic_3 uint256 tokenId)View Source

Topics
Data
    0x
26
Address
0xee7d8bcfb72bc1880d0cf19822eb0a2e6577ab62 (VaultBridge: vbETH Token)
Name

Transfer (index_topic_1 address from, index_topic_2 address to, uint256 value)View Source

Topics
Data
  • value :8418576600729
27
Address
0x3388a64dc6e1c0dfe7ec965aaa928dc3d49971aa
Name

FeeCharged (address strategy, bytes4 feeDescriptor, uint256 amount, address token)View Source

Topics
  • 0 0x20637f693d80799c8bf08f5bf9614910f0106e0f0d787852fcd247b514b5f1ee
Data
28
Address
0xee7d8bcfb72bc1880d0cf19822eb0a2e6577ab62 (VaultBridge: vbETH Token)
Name

Approval (index_topic_1 address owner, index_topic_2 address spender, uint256 value)View Source

Topics
Data
  • value :0
29
Address
0xee7d8bcfb72bc1880d0cf19822eb0a2e6577ab62 (VaultBridge: vbETH Token)
Name

Approval (index_topic_1 address owner, index_topic_2 address spender, uint256 value)View Source

Topics
Data
  • value :14593120433900268
30
Address
0xee7d8bcfb72bc1880d0cf19822eb0a2e6577ab62 (VaultBridge: vbETH Token)
Name

Transfer (index_topic_1 address from, index_topic_2 address to, uint256 value)View Source

Topics
Data
  • value :14593120433900268
31
Address
0x00000000efe302beaa2b3e6e1b18d08d69a9012a (Agora: AUSD Token)
Name

Transfer (index_topic_1 address from, index_topic_2 address to, uint256 value)View Source

Topics
Data
  • value :14599686
32
Address
0xee7d8bcfb72bc1880d0cf19822eb0a2e6577ab62 (VaultBridge: vbETH Token)
Name

Transfer (index_topic_1 address from, index_topic_2 address to, uint256 value)View Source

Topics
Data
  • value :4864373477966756
33
Address
0xa522683ece4b864a505cc7d4f65faefc93e72f38
Name

Swap (index_topic_1 address sender, index_topic_2 address recipient, int256 amount0, int256 amount1, uint160 sqrtPriceX96, uint128 liquidity, int24 tick)View Source

Topics
Data
  • amount0 :-14599686
  • amount1 :4864373477966756
  • sqrtPriceX96 :1444300577148322307559942041245677
  • liquidity :651189307948219
  • tick :196225
34
Address
0x2dca96907fde857dd3d816880a0df407eeb2d2f2 (VaultBridge: vbUSDT Token)
Name

Transfer (index_topic_1 address from, index_topic_2 address to, uint256 value)View Source

Topics
Data
  • value :29197776
35
Address
0xee7d8bcfb72bc1880d0cf19822eb0a2e6577ab62 (VaultBridge: vbETH Token)
Name

Transfer (index_topic_1 address from, index_topic_2 address to, uint256 value)View Source

Topics
Data
  • value :9728746955933512
36
Address
0x5ee63f441aa80e8c8d3ba80df8371754c052b027
Name

Swap (index_topic_1 address sender, index_topic_2 address recipient, int256 amount0, int256 amount1, uint160 sqrtPriceX96, uint128 liquidity, int24 tick)View Source

Topics
Data
  • amount0 :-29197776
  • amount1 :9728746955933512
  • sqrtPriceX96 :1444076370505151567597460630926456
  • liquidity :12247549734198720
  • tick :196222
37
Address
0x2dca96907fde857dd3d816880a0df407eeb2d2f2 (VaultBridge: vbUSDT Token)
Name

Transfer (index_topic_1 address from, index_topic_2 address to, uint256 value)View Source

Topics
Data
  • value :14604552
38
Address
0x00000000efe302beaa2b3e6e1b18d08d69a9012a (Agora: AUSD Token)
Name

Transfer (index_topic_1 address from, index_topic_2 address to, uint256 value)View Source

Topics
Data
  • value :14599686
39
Address
0x381e0e9ded3a1c3fb06a808050d5b1912273a1a6
Name

Swap (index_topic_1 address sender, index_topic_2 address recipient, int256 amount0, int256 amount1, uint160 sqrtPriceX96, uint128 liquidity, int24 tick)View Source

Topics
Data
  • amount0 :14599686
  • amount1 :-14604552
  • sqrtPriceX96 :79239379396204345991852276087
  • liquidity :97392997585
  • tick :2
40
Address
0x2dca96907fde857dd3d816880a0df407eeb2d2f2 (VaultBridge: vbUSDT Token)
Name

Transfer (index_topic_1 address from, index_topic_2 address to, uint256 value)View Source

Topics
Data
  • value :43802328
41
Address
0xd2b37ade14708bf18904047b1e31f8166d39612b
Topics
  • 0 0x84b514c5b926879bf66a04e4becdc6f521e94a4411e7dfa3dd255f214478f558
  • 1 0x000000000000000000000000ad27827c312cd5e71311d68e180a9872d42de23d
  • 2 0x000000000000000000000000ee7d8bcfb72bc1880d0cf19822eb0a2e6577ab62
  • 3 0x0000000000000000000000000000000000000000000000000000000000000007
Data
  • 0000000000000000000000003388a64dc6e1c0dfe7ec965aaa928dc3d49971aa
  • 0000000000000000000000002dca96907fde857dd3d816880a0df407eeb2d2f2
  • 0000000000000000000000000000000000000000000000000033d85d9fa08aec
  • 00000000000000000000000000000000000000000000000000000000029c5ed8
  • fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffe
  • 0000000000000000000000000000000000000000000000000000000000000000
42
Address
0x3388a64dc6e1c0dfe7ec965aaa928dc3d49971aa
Name

SwapExecuted (index_topic_1 address router, index_topic_2 address tokenIn, index_topic_3 address tokenOut, uint256 amountIn, uint256 desiredAmountOut, uint256 minAmountOut, uint256 actualAmountOut)View Source

Topics
Data
  • amountIn :14593120433900268
  • desiredAmountOut :43802330
  • minAmountOut :43583318
  • actualAmountOut :43802328
43
Address
0xee7d8bcfb72bc1880d0cf19822eb0a2e6577ab62 (VaultBridge: vbETH Token)
Name

Approval (index_topic_1 address owner, index_topic_2 address spender, uint256 value)View Source

Topics
Data
  • value :0
44
Address
0x2dca96907fde857dd3d816880a0df407eeb2d2f2 (VaultBridge: vbUSDT Token)
Name

Approval (index_topic_1 address owner, index_topic_2 address spender, uint256 value)View Source

Topics
Data
  • value :0
45
Address
0x2dca96907fde857dd3d816880a0df407eeb2d2f2 (VaultBridge: vbUSDT Token)
Name

Approval (index_topic_1 address owner, index_topic_2 address spender, uint256 value)View Source

Topics
Data
  • value :43802328
46
Address
0xee7d8bcfb72bc1880d0cf19822eb0a2e6577ab62 (VaultBridge: vbETH Token)
Name

Approval (index_topic_1 address owner, index_topic_2 address spender, uint256 value)View Source

Topics
Data
  • value :0
47
Address
0xee7d8bcfb72bc1880d0cf19822eb0a2e6577ab62 (VaultBridge: vbETH Token)
Name

Approval (index_topic_1 address owner, index_topic_2 address spender, uint256 value)View Source

Topics
Data
  • value :13460382991930215
48
Address
0x2dca96907fde857dd3d816880a0df407eeb2d2f2 (VaultBridge: vbUSDT Token)
Name

Transfer (index_topic_1 address from, index_topic_2 address to, uint256 value)View Source

Topics
Data
  • value :43384949
49
Address
0xee7d8bcfb72bc1880d0cf19822eb0a2e6577ab62 (VaultBridge: vbETH Token)
Name

Transfer (index_topic_1 address from, index_topic_2 address to, uint256 value)View Source

Topics
Data
  • value :13460382991930084
50
Address
0x5ee63f441aa80e8c8d3ba80df8371754c052b027
Name

Mint (address sender, index_topic_1 address owner, index_topic_2 int24 tickLower, index_topic_3 int24 tickUpper, uint128 amount, uint256 amount0, uint256 amount1)View Source

Topics
Data
  • sender :0x2659C6085D26144117D904C46B48B6d180393d27
  • amount :73209116544681
  • amount0 :43384949
  • amount1 :13460382991930084
51
Address
0x2659c6085d26144117d904c46b48b6d180393d27 (SushiSwap V3: Position Manager)
Name

Transfer (index_topic_1 address from, index_topic_2 address to, index_topic_3 uint256 tokenId)View Source

Topics
Data
    0x
52
Address
0x2659c6085d26144117d904c46b48b6d180393d27 (SushiSwap V3: Position Manager)
Name

IncreaseLiquidity (index_topic_1 uint256 tokenId, uint128 liquidity, uint256 amount0, uint256 amount1)View Source

Topics
  • 0 0x3067048beee31b25b2f1681f88dac838c8bba36af25bfb2b7cf7473a5847e35f
  • 1: tokenId 98091
Data
  • liquidity :73209116544681
  • amount0 :43384949
  • amount1 :13460382991930084
53
Address
0x2dca96907fde857dd3d816880a0df407eeb2d2f2 (VaultBridge: vbUSDT Token)
Name

Approval (index_topic_1 address owner, index_topic_2 address spender, uint256 value)View Source

Topics
Data
  • value :0
54
Address
0xee7d8bcfb72bc1880d0cf19822eb0a2e6577ab62 (VaultBridge: vbETH Token)
Name

Approval (index_topic_1 address owner, index_topic_2 address spender, uint256 value)View Source

Topics
Data
  • value :0
55
Address
0x372e7761997858be1ee3c492dfa01091282c5083
Name

NftSettingsUnset (tuple key)View Source

Topics
  • 0 0xaa3b569bcc3b07fe86d5ae3e76d5d1006e3078ab36159916f288c61b95d01752
Data
  • 0000000000000000000000003388a64dc6e1c0dfe7ec965aaa928dc3d49971aa
  • 0000000000000000000000002659c6085d26144117d904c46b48b6d180393d27
  • 00000000000000000000000000000000000000000000000000000000000178d7
56
Address
0x372e7761997858be1ee3c492dfa01091282c5083
Name

NftSettingsSet (tuple key, tuple settings)View Source

Topics
  • 0 0xb566e9ef526dad3c79be7d60406d5e70e9218d05c8072728570b032e32377d49
Data
  • 0000000000000000000000003388a64dc6e1c0dfe7ec965aaa928dc3d49971aa
  • 0000000000000000000000002659c6085d26144117d904c46b48b6d180393d27
  • 0000000000000000000000000000000000000000000000000000000000017f2b
  • 0000000000000000000000000000000000000000000000000000000000000080
  • 0000000000000000000000005ee63f441aa80e8c8d3ba80df8371754c052b027
  • 0000000000000000000000000000000000000000000000000000000000000000
  • 0000000000000000000000000000000000000000000000000000000000000000
  • 0000000000000000000000000000000000000000000000000000000000000000
  • 0000000000000000000000000000000000000000000000000000000000000000
  • 0000000000000000000000000000000000000000000000000000000000000000
  • 0000000000000000000000000000000000000000000000000000000000000000
  • 0000000000000000000000000000000000000000000000000000000000000000
  • 0000000000000000000000000000000000000000000000000000000000000000
  • 0000000000000000000000000000000000000000000000000000000000000000
  • 0000000000000000000000000000000000000000000000000000000000000000
  • 0000000000000000000000000000000000000000000000000000000000000000
  • 0000000000000000000000000000000000000000000000000000000000000000
  • 0000000000000000000000000000000000000000000000000000000000000000
  • 0000000000000000000000000000000000000000000000000000000000000000
  • 0000000000000000000000000000000000000000000000000000000000000000
  • 0000000000000000000000000000000000000000000000000000000000000000
  • 0000000000000000000000000000000000000000000000000000000000000000
  • 0000000000000000000000000000000000000000000000000000000000000000
  • 0000000000000000000000000000000000000000000000000000000000000000
  • 0000000000000000000000000000000000000000000000000000000000000000
  • 0000000000000000000000000000000000000000000000000000000000000000
  • 0000000000000000000000000000000000000000000000000000000000000000
  • 0000000000000000000000000000000000000000000000000000000000000000
  • 0000000000000000000000000000000000000000000000000000000000000000
  • 0000000000000000000000000000000000000000000000000000000000000340
  • 0000000000000000000000000000000000000000000000000000000000000000
57
Address
0x5acb2ec8e7755366e0f23df4579cb5cfaf14715c
Name

SickleDepositedNft (index_topic_1 address sickle, index_topic_2 address nft, index_topic_3 uint256 tokenId, address stakingContract, uint256 poolIndex)View Source

Topics
Data
58
Address
0x2dca96907fde857dd3d816880a0df407eeb2d2f2 (VaultBridge: vbUSDT Token)
Name

Transfer (index_topic_1 address from, index_topic_2 address to, uint256 value)View Source

Topics
Data
  • value :417379
59
Address
0xee7d8bcfb72bc1880d0cf19822eb0a2e6577ab62 (VaultBridge: vbETH Token)
Name

Transfer (index_topic_1 address from, index_topic_2 address to, uint256 value)View Source

Topics
Data
  • value :131
60
Address
0x5acb2ec8e7755366e0f23df4579cb5cfaf14715c
Name

SickleRebalancedNft (index_topic_1 address sickle, index_topic_2 address nft, index_topic_3 uint256 tokenId, address stakingContract, uint256 poolIndex)View Source

Topics
Data
:
:
:
:
:
:
:
:
:
:
: 

                

            




            

                

                    
                    

                        

                            

                                
                                    

                                        Authority
                                        
                                            Delegated Address
                                        
                                        Nonce
                                        Validity 
                                        yParity
                                        r
                                        s
                                    

                                
                                
                                    
                                
                            

                        

                        

                    

                    
                


            


            
            

                

                    

                        
Loading

                    

                    

                        
                    

                

            

            

            

                

                    

                        
Loading

                    

                    

                        
                    

                

            


            
        

        

        
        

            

                 
                A transaction is a cryptographically signed instruction that changes the blockchain state. Block explorers track the details of all transactions in the network. Learn more about transactions in our Knowledge Base.