Transaction Details
The contract call From 0xF6d3a79D...1923b9999 To 0xaC041Df4...50C5f2e9D produced 2 Internal Transactions
Type Trace Address | From | To | Value | Gas Limit | |
---|---|---|---|---|---|
call_0_1 | 0xaC041Df4...50C5f2e9D | 0xB28Ca7e4...ba553CF82 | 1,000 S | 1,909,599 | |
call_0_1_1 | 0xB28Ca7e4...ba553CF82 | 0x039e2fB6...3bc94aD38 | 1,000 S | 1,865,349 |
AA Txn Hash | Method | Position | From | Internal Txns | Token Txns | NFT Txns | Txn Fee (ETH) | Gas Limit |
---|
Transaction Receipt Event Logs
-
Address
- 0x039e2fb66102314ce7b64ce5ce3e5183bc94ad38 (Sonic Labs: wS Token)
Name
Transfer (index_topic_1 address from, index_topic_2 address to, uint256 value)View Source
Topics
- 0 0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef
- 1: from 0x0000000000000000000000000000000000000000
- 2: to 0xB28Ca7e465C452cE4252598e0Bc96Aeba553CF82
Data
- value :1000000000000000000000
-
Address
- 0x039e2fb66102314ce7b64ce5ce3e5183bc94ad38 (Sonic Labs: wS Token)
Name
Deposit (index_topic_1 address account, uint256 value)View Source
Topics
- 0 0xe1fffcc4923d04b559f4d29a8bfc6cda04eb5b0d3c460751c2402c5c5cc9109c
- 1: account 0xB28Ca7e465C452cE4252598e0Bc96Aeba553CF82
Data
- value :1000000000000000000000
-
Address
- 0xe5da20f15420ad15de0fa650600afc998bbe3955 (Beets: Staked Sonic)
Name
Transfer (index_topic_1 address from, index_topic_2 address to, uint256 value)View Source
Topics
- 0 0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef
- 1: from 0xD760791B29e7894FB827A94Ca433254bb5aFB653
- 2: to 0xB28Ca7e465C452cE4252598e0Bc96Aeba553CF82
Data
- value :648939352475541306293
-
Address
- 0x039e2fb66102314ce7b64ce5ce3e5183bc94ad38 (Sonic Labs: wS Token)
Name
Transfer (index_topic_1 address from, index_topic_2 address to, uint256 value)View Source
Topics
- 0 0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef
- 1: from 0xB28Ca7e465C452cE4252598e0Bc96Aeba553CF82
- 2: to 0xD760791B29e7894FB827A94Ca433254bb5aFB653
Data
- value :655514822574332356453
Name
Swap (index_topic_1 address sender, index_topic_2 address recipient, int256 amount0, int256 amount1, uint160 price, uint128 liquidity, int24 tick)View Source
Topics
- 0 0xc42079f94a6350d7e6235f29174924f928cc2ac818eb64fed8004e115fbcca67
- 1: sender 0xB28Ca7e465C452cE4252598e0Bc96Aeba553CF82
- 2: recipient 0xB28Ca7e465C452cE4252598e0Bc96Aeba553CF82
Data
- amount0 :655514822574332356453
- amount1 :-648939352475541306293
- price :78832548211791397134460907606
- liquidity :8416880466031764238248313617
- tick :-101
-
Address
- 0xe5da20f15420ad15de0fa650600afc998bbe3955 (Beets: Staked Sonic)
Name
Approval (index_topic_1 address owner, index_topic_2 address spender, uint256 value)View Source
Topics
- 0 0x8c5be1e5ebec7d5bd14f71427d1e84f3dd0314c0f7b2291e5b200ac8c7c3b925
- 1: owner 0xB28Ca7e465C452cE4252598e0Bc96Aeba553CF82
- 2: spender 0xBA12222222228d8Ba445958a75a0704d566BF2C8
Data
- value :367469026727842154788
-
Address
- 0xba12222222228d8ba445958a75a0704d566bf2c8 (Beets: Vault V2)
Name
Swap (index_topic_1 bytes32 poolId, index_topic_2 address tokenIn, index_topic_3 address tokenOut, uint256 amountIn, uint256 amountOut)View Source
Topics
- 0 0x2170c741c41531aec20e7c107c24eecfdd15e69c9bb0a8dd37b1840b9e0b207b
- 1: poolId 25CA5451CD5A50AB1D324B5E64F32C0799661891000200000000000000000018
- 2: tokenIn 0xE5DA20F15420aD15DE0fa650600aFc998bbE3955
- 3: tokenOut 0xd3DCe716f3eF535C5Ff8d041c1A41C3bd89b97aE
Data
- amountIn :367469026727842154788
- amountOut :205868563
-
Address
- 0xe5da20f15420ad15de0fa650600afc998bbe3955 (Beets: Staked Sonic)
Name
Transfer (index_topic_1 address from, index_topic_2 address to, uint256 value)View Source
Topics
- 0 0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef
- 1: from 0xB28Ca7e465C452cE4252598e0Bc96Aeba553CF82
- 2: to 0xBA12222222228d8Ba445958a75a0704d566BF2C8
Data
- value :367469026727842154788
-
Address
- 0xd3dce716f3ef535c5ff8d041c1a41c3bd89b97ae (Rings: scUSD Token)
Name
Transfer (index_topic_1 address from, index_topic_2 address to, uint256 amount)View Source
Topics
- 0 0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef
- 1: from 0xBA12222222228d8Ba445958a75a0704d566BF2C8
- 2: to 0xB28Ca7e465C452cE4252598e0Bc96Aeba553CF82
Data
- amount :205868563
-
Address
- 0xe5da20f15420ad15de0fa650600afc998bbe3955 (Beets: Staked Sonic)
Name
Approval (index_topic_1 address owner, index_topic_2 address spender, uint256 value)View Source
Topics
- 0 0x8c5be1e5ebec7d5bd14f71427d1e84f3dd0314c0f7b2291e5b200ac8c7c3b925
- 1: owner 0xB28Ca7e465C452cE4252598e0Bc96Aeba553CF82
- 2: spender 0xBA12222222228d8Ba445958a75a0704d566BF2C8
Data
- value :77110597900359387606
-
Address
- 0xba12222222228d8ba445958a75a0704d566bf2c8 (Beets: Vault V2)
Name
Swap (index_topic_1 bytes32 poolId, index_topic_2 address tokenIn, index_topic_3 address tokenOut, uint256 amountIn, uint256 amountOut)View Source
Topics
- 0 0x2170c741c41531aec20e7c107c24eecfdd15e69c9bb0a8dd37b1840b9e0b207b
- 1: poolId BD4A2ECDCD7ACB0D2B20744AC4CC1368DD8FDC410001000000000000000000A8
- 2: tokenIn 0xE5DA20F15420aD15DE0fa650600aFc998bbE3955
- 3: tokenOut 0xd3DCe716f3eF535C5Ff8d041c1A41C3bd89b97aE
Data
- amountIn :77110597900359387606
- amountOut :43191096
-
Address
- 0xe5da20f15420ad15de0fa650600afc998bbe3955 (Beets: Staked Sonic)
Name
Transfer (index_topic_1 address from, index_topic_2 address to, uint256 value)View Source
Topics
- 0 0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef
- 1: from 0xB28Ca7e465C452cE4252598e0Bc96Aeba553CF82
- 2: to 0xBA12222222228d8Ba445958a75a0704d566BF2C8
Data
- value :77110597900359387606
-
Address
- 0xd3dce716f3ef535c5ff8d041c1a41c3bd89b97ae (Rings: scUSD Token)
Name
Transfer (index_topic_1 address from, index_topic_2 address to, uint256 amount)View Source
Topics
- 0 0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef
- 1: from 0xBA12222222228d8Ba445958a75a0704d566BF2C8
- 2: to 0xB28Ca7e465C452cE4252598e0Bc96Aeba553CF82
Data
- amount :43191096
-
Address
- 0xe5da20f15420ad15de0fa650600afc998bbe3955 (Beets: Staked Sonic)
Name
Approval (index_topic_1 address owner, index_topic_2 address spender, uint256 value)View Source
Topics
- 0 0x8c5be1e5ebec7d5bd14f71427d1e84f3dd0314c0f7b2291e5b200ac8c7c3b925
- 1: owner 0xB28Ca7e465C452cE4252598e0Bc96Aeba553CF82
- 2: spender 0xBA12222222228d8Ba445958a75a0704d566BF2C8
Data
- value :204359727847339763899
Name
SwapParams (uint256[] balances, tuple invariant, uint256 amount)View Source
Topics
- 0 0x4e1d56f7310a8c32b2267f756b19ba65019b4890068ce114a25009abe54de5ba
Data
- 0000000000000000000000000000000000000000000000000000000000000080
- 00000000000000000000000000000000000000000000671161f5119dd4bea39a
- 00000000000000000000000000000000000000000000671161f5119dd4bea2d4
- 000000000000000000000000000000000000000000000006336cd6c770b4f6c0
- 0000000000000000000000000000000000000000000000000000000000000002
- 0000000000000000000000000000000000000000000005892231a3c8b47eb000
- 000000000000000000000000000000000000000000001a52c265bb31f6d9796a
-
Address
- 0xba12222222228d8ba445958a75a0704d566bf2c8 (Beets: Vault V2)
Name
Swap (index_topic_1 bytes32 poolId, index_topic_2 address tokenIn, index_topic_3 address tokenOut, uint256 amountIn, uint256 amountOut)View Source
Topics
- 0 0x2170c741c41531aec20e7c107c24eecfdd15e69c9bb0a8dd37b1840b9e0b207b
- 1: poolId CF5D1864AB01B50C6E94ADDE80D5EC264C93F4910002000000000000000000BB
- 2: tokenIn 0xE5DA20F15420aD15DE0fa650600aFc998bbE3955
- 3: tokenOut 0xd3DCe716f3eF535C5Ff8d041c1A41C3bd89b97aE
Data
- amountIn :204359727847339763899
- amountOut :114386037
-
Address
- 0xe5da20f15420ad15de0fa650600afc998bbe3955 (Beets: Staked Sonic)
Name
Transfer (index_topic_1 address from, index_topic_2 address to, uint256 value)View Source
Topics
- 0 0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef
- 1: from 0xB28Ca7e465C452cE4252598e0Bc96Aeba553CF82
- 2: to 0xBA12222222228d8Ba445958a75a0704d566BF2C8
Data
- value :204359727847339763899
-
Address
- 0xd3dce716f3ef535c5ff8d041c1a41c3bd89b97ae (Rings: scUSD Token)
Name
Transfer (index_topic_1 address from, index_topic_2 address to, uint256 amount)View Source
Topics
- 0 0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef
- 1: from 0xBA12222222228d8Ba445958a75a0704d566BF2C8
- 2: to 0xB28Ca7e465C452cE4252598e0Bc96Aeba553CF82
Data
- amount :114386037
-
Address
- 0x50c42deacd8fc9773493ed674b675be577f2634b (Sonic Labs: WETH Token)
Name
Transfer (index_topic_1 address from, index_topic_2 address to, uint256 value)View Source
Topics
- 0 0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef
- 1: from 0xF58fC088C33aD46113940173cB0da3Dd08c4AA88
- 2: to 0xB28Ca7e465C452cE4252598e0Bc96Aeba553CF82
Data
- value :29123559916279231
-
Address
- 0x039e2fb66102314ce7b64ce5ce3e5183bc94ad38 (Sonic Labs: wS Token)
Name
Transfer (index_topic_1 address from, index_topic_2 address to, uint256 value)View Source
Topics
- 0 0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef
- 1: from 0xB28Ca7e465C452cE4252598e0Bc96Aeba553CF82
- 2: to 0xF58fC088C33aD46113940173cB0da3Dd08c4AA88
Data
- value :116382498189107346235
Name
Swap (index_topic_1 address sender, index_topic_2 address recipient, int256 amount0, int256 amount1, uint160 price, uint128 liquidity, int24 tick)View Source
Topics
- 0 0xc42079f94a6350d7e6235f29174924f928cc2ac818eb64fed8004e115fbcca67
- 1: sender 0xB28Ca7e465C452cE4252598e0Bc96Aeba553CF82
- 2: recipient 0xB28Ca7e465C452cE4252598e0Bc96Aeba553CF82
Data
- amount0 :116382498189107346235
- amount1 :-29123559916279231
- price :1254173536973099643990026028
- liquidity :87566278116585281646832
- tick :-82922
-
Address
- 0x039e2fb66102314ce7b64ce5ce3e5183bc94ad38 (Sonic Labs: wS Token)
Name
Transfer (index_topic_1 address from, index_topic_2 address to, uint256 value)View Source
Topics
- 0 0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef
- 1: from 0xB28Ca7e465C452cE4252598e0Bc96Aeba553CF82
- 2: to 0xEbcCE8b534A35E93c7Cf25f3FfF2F8202F9f0655
Data
- value :228102679236560297312
-
Address
- 0x71e99522ead5e21cf57f1f542dc4ad2e841f7321 (Metropolis: METRO Token)
Name
Transfer (index_topic_1 address from, index_topic_2 address to, uint256 value)View Source
Topics
- 0 0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef
- 1: from 0x1a5Ded6adCfc64aceDE86151B1F142088C6E03da
- 2: to 0xE3F132867fC5cbb95D21C53c00647E8e7Cd6CF97
Data
- value :0
-
Address
- 0x71e99522ead5e21cf57f1f542dc4ad2e841f7321 (Metropolis: METRO Token)
Name
Transfer (index_topic_1 address from, index_topic_2 address to, uint256 value)View Source
Topics
- 0 0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef
- 1: from 0x1a5Ded6adCfc64aceDE86151B1F142088C6E03da
- 2: to 0x9E3f2A82Ad9F0C83DE176E3108068635628403a0
Data
- value :14242728251622085
Name
PositionModified (index_topic_1 uint256 pid, index_topic_2 address account, int256 deltaAmount, uint256 metroReward)View Source
Topics
- 0 0x0e006e790dc8db480892a6d5c0bf539c411db278e5185b07d46bdcc110ba6af5
- 1: pid 5
- 2: account 0x9E3f2A82Ad9F0C83DE176E3108068635628403a0
Data
- deltaAmount :0
- metroReward :14242728251622085
Name
Swap (index_topic_1 address sender, index_topic_2 address to, uint24 id, bytes32 amountsIn, bytes32 amountsOut, uint24 volatilityAccumulator, bytes32 totalFees, bytes32 protocolFees)View Source
Topics
- 0 0xad7d6f97abf51ce18e17a38f4d70e975be9c0708474987bb3e26ad21bd93ca70
- 1: sender 0xB28Ca7e465C452cE4252598e0Bc96Aeba553CF82
- 2: to 0xB28Ca7e465C452cE4252598e0Bc96Aeba553CF82
Data
- id :8374484
- amountsIn :00000000000000000000000000000000000000000000000B619E1E1B9CD675E3
- amountsOut :00000000000000000000000006EEA62300000000000000000000000000000000
- volatilityAccumulator :14426
- totalFees :000000000000000000000000000000000000000000000000075650ACC7AC9277
- protocolFees :00000000000000000000000000000000000000000000000001D5942B31EB249D
Name
Swap (index_topic_1 address sender, index_topic_2 address to, uint24 id, bytes32 amountsIn, bytes32 amountsOut, uint24 volatilityAccumulator, bytes32 totalFees, bytes32 protocolFees)View Source
Topics
- 0 0xad7d6f97abf51ce18e17a38f4d70e975be9c0708474987bb3e26ad21bd93ca70
- 1: sender 0xB28Ca7e465C452cE4252598e0Bc96Aeba553CF82
- 2: to 0xB28Ca7e465C452cE4252598e0Bc96Aeba553CF82
Data
- id :8374483
- amountsIn :000000000000000000000000000000000000000000000000F9F307E929D4D7BF
- amountsOut :0000000000000000000000000097EF0400000000000000000000000000000000
- volatilityAccumulator :24426
- totalFees :00000000000000000000000000000000000000000000000000A3202765D6AC87
- protocolFees :0000000000000000000000000000000000000000000000000028C809D975AB21
-
Address
- 0xd3dce716f3ef535c5ff8d041c1a41c3bd89b97ae (Rings: scUSD Token)
Name
Transfer (index_topic_1 address from, index_topic_2 address to, uint256 amount)View Source
Topics
- 0 0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef
- 1: from 0xEbcCE8b534A35E93c7Cf25f3FfF2F8202F9f0655
- 2: to 0xB28Ca7e465C452cE4252598e0Bc96Aeba553CF82
Data
- amount :126260519
-
Address
- 0xd3dce716f3ef535c5ff8d041c1a41c3bd89b97ae (Rings: scUSD Token)
Name
Approval (index_topic_1 address owner, index_topic_2 address spender, uint256 amount)View Source
Topics
- 0 0x8c5be1e5ebec7d5bd14f71427d1e84f3dd0314c0f7b2291e5b200ac8c7c3b925
- 1: owner 0xB28Ca7e465C452cE4252598e0Bc96Aeba553CF82
- 2: spender 0xBA12222222228d8Ba445958a75a0704d566BF2C8
Data
- amount :489706215
-
Address
- 0xba12222222228d8ba445958a75a0704d566bf2c8 (Beets: Vault V2)
Name
Swap (index_topic_1 bytes32 poolId, index_topic_2 address tokenIn, index_topic_3 address tokenOut, uint256 amountIn, uint256 amountOut)View Source
Topics
- 0 0x2170c741c41531aec20e7c107c24eecfdd15e69c9bb0a8dd37b1840b9e0b207b
- 1: poolId CD4D2B142235D5650FFA6A38787ED0B7D7A51C0C000000000000000000000037
- 2: tokenIn 0xd3DCe716f3eF535C5Ff8d041c1A41C3bd89b97aE
- 3: tokenOut 0x29219dd400f2Bf60E5a23d13Be72B486D4038894
Data
- amountIn :489706215
- amountOut :489184355
-
Address
- 0xd3dce716f3ef535c5ff8d041c1a41c3bd89b97ae (Rings: scUSD Token)
Name
Transfer (index_topic_1 address from, index_topic_2 address to, uint256 amount)View Source
Topics
- 0 0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef
- 1: from 0xB28Ca7e465C452cE4252598e0Bc96Aeba553CF82
- 2: to 0xBA12222222228d8Ba445958a75a0704d566BF2C8
Data
- amount :489706215
-
Address
- 0x29219dd400f2bf60e5a23d13be72b486d4038894 (Sonic Labs: Bridged USDC.e Token)
Name
Transfer (index_topic_1 address from, index_topic_2 address to, uint256 value)View Source
Topics
- 0 0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef
- 1: from 0xBA12222222228d8Ba445958a75a0704d566BF2C8
- 2: to 0xaC041Df48dF9791B0654f1Dbbf2CC8450C5f2e9D
Data
- value :489184355
-
Address
- 0x50c42deacd8fc9773493ed674b675be577f2634b (Sonic Labs: WETH Token)
Name
Approval (index_topic_1 address owner, index_topic_2 address spender, uint256 value)View Source
Topics
- 0 0x8c5be1e5ebec7d5bd14f71427d1e84f3dd0314c0f7b2291e5b200ac8c7c3b925
- 1: owner 0xB28Ca7e465C452cE4252598e0Bc96Aeba553CF82
- 2: spender 0xBA12222222228d8Ba445958a75a0704d566BF2C8
Data
- value :29123559916279231
Name
SwapParams (uint256[] balances, tuple invariant, uint256 amount)View Source
Topics
- 0 0x4e1d56f7310a8c32b2267f756b19ba65019b4890068ce114a25009abe54de5ba
Data
- 0000000000000000000000000000000000000000000000000000000000000080
- 00000000000000000000000000000000000000000000730493b453125923a0a8
- 00000000000000000000000000000000000000000000730493b4531259239f9a
- 0000000000000000000000000000000000000000000000037e61bf2a48f866f0
- 0000000000000000000000000000000000000000000000000000000000000002
- 000000000000000000000000000000000000000000000a64432cbc7a35e57000
- 000000000000000000000000000000000000000000000d41b37f7761b0d49c74
-
Address
- 0xba12222222228d8ba445958a75a0704d566bf2c8 (Beets: Vault V2)
Name
Swap (index_topic_1 bytes32 poolId, index_topic_2 address tokenIn, index_topic_3 address tokenOut, uint256 amountIn, uint256 amountOut)View Source
Topics
- 0 0x2170c741c41531aec20e7c107c24eecfdd15e69c9bb0a8dd37b1840b9e0b207b
- 1: poolId 5485C26921E28830FBD7469442C0EDAD0E27E01C0002000000000000000000C7
- 2: tokenIn 0x50c42dEAcD8Fc9773493ED674b675bE577f2634b
- 3: tokenOut 0x29219dd400f2Bf60E5a23d13Be72B486D4038894
Data
- amountIn :29123559916279231
- amountOut :64447002
-
Address
- 0x50c42deacd8fc9773493ed674b675be577f2634b (Sonic Labs: WETH Token)
Name
Transfer (index_topic_1 address from, index_topic_2 address to, uint256 value)View Source
Topics
- 0 0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef
- 1: from 0xB28Ca7e465C452cE4252598e0Bc96Aeba553CF82
- 2: to 0xBA12222222228d8Ba445958a75a0704d566BF2C8
Data
- value :29123559916279231
-
Address
- 0x29219dd400f2bf60e5a23d13be72b486d4038894 (Sonic Labs: Bridged USDC.e Token)
Name
Transfer (index_topic_1 address from, index_topic_2 address to, uint256 value)View Source
Topics
- 0 0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef
- 1: from 0xBA12222222228d8Ba445958a75a0704d566BF2C8
- 2: to 0xaC041Df48dF9791B0654f1Dbbf2CC8450C5f2e9D
Data
- value :64447002
-
Address
- 0x29219dd400f2bf60e5a23d13be72b486d4038894 (Sonic Labs: Bridged USDC.e Token)
Name
Transfer (index_topic_1 address from, index_topic_2 address to, uint256 value)View Source
Topics
- 0 0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef
- 1: from 0xaC041Df48dF9791B0654f1Dbbf2CC8450C5f2e9D
- 2: to 0xF6d3a79D0B625AA42950a7f07E034861923b9999
Data
- value :553631357
Name
Swap (address sender, uint256 inputAmount, address inputToken, uint256 amountOut, address outputToken, int256 slippage, uint32 referralCode)View Source
Topics
- 0 0x823eaf01002d7353fbcadb2ea3305cc46fa35d799cb0914846d185ac06f8ad05
Data
- sender :0xF6d3a79D0B625AA42950a7f07E034861923b9999
- inputAmount :1000000000000000000000
- inputToken :0x0000000000000000000000000000000000000000
- amountOut :553631357
- outputToken :0x29219dd400f2Bf60E5a23d13Be72B486D4038894
- slippage :-407934
- referralCode :0
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.