Transaction Details
Type Trace Address | From | To | Value | Gas Limit |
---|
AA Txn Hash | Method | Position | From | Internal Txns | Token Txns | NFT Txns | Txn Fee (ETH) | Gas Limit |
---|
Transaction Receipt Event Logs
Name
Burn (index_topic_1 address owner, index_topic_2 int24 bottomTick, index_topic_3 int24 topTick, uint128 liquidityAmount, uint256 amount0, uint256 amount1)View Source
Topics
- 0 0x0c396cd989a39f4459b5fa1aed6a9a8dcdbc45908acfd67e028cd568da98982c
- 1: owner 0xd7A4483115796E3F7A9Db030c388Ed061eE979ab
- 2: bottomTick -78190
- 3: topTick -75260
Data
- liquidityAmount :0
- amount0 :0
- amount1 :0
-
Address
- 0x48b62137edfa95a428d35c09e44256a739f6b557 (Apecoin: WAPE Token)
Name
Transfer (index_topic_1 address from, index_topic_2 address to, uint256 value)View Source
Topics
- 0 0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef
- 1: from 0x1EA5Df273F1b2e0b10554C8F6f7Cc7Ef34F6a51b
- 2: to 0xd7A4483115796E3F7A9Db030c388Ed061eE979ab
Data
- value :15223982977856574184
-
Address
- 0xcf800f4948d16f23333508191b1b1591daf70438 (Apecoin: ApeETH Token)
Name
Transfer (index_topic_1 address from, index_topic_2 address to, uint256 value)View Source
Topics
- 0 0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef
- 1: from 0x1EA5Df273F1b2e0b10554C8F6f7Cc7Ef34F6a51b
- 2: to 0xd7A4483115796E3F7A9Db030c388Ed061eE979ab
Data
- value :1615858949276761
-
Address
- 0xcf800f4948d16f23333508191b1b1591daf70438 (Apecoin: ApeETH Token)
Topics
- 0 0x9d9c909296d9c674451c0c24f02cb64981eb3b727f99865939192f880a755dcb
- 1 0x0000000000000000000000001ea5df273f1b2e0b10554c8f6f7cc7ef34f6a51b
- 2 0x000000000000000000000000d7a4483115796e3f7a9db030c388ed061ee979ab
Data
- 0000000000000000000000000000000000000000000000000004d65563247fad
Name
Collect (index_topic_1 address owner, address recipient, index_topic_2 int24 bottomTick, index_topic_3 int24 topTick, uint128 amount0, uint128 amount1)View Source
Topics
- 0 0x70935338e69775456a85ddef226c395fb668b63fa0115f5f20610b388e6ca9c0
- 1: owner 0xd7A4483115796E3F7A9Db030c388Ed061eE979ab
- 2: bottomTick -78190
- 3: topTick -75260
Data
- recipient :0xd7A4483115796E3F7A9Db030c388Ed061eE979ab
- amount0 :15223982977856574184
- amount1 :1615858949276761
Topics
- 0 0x0da837506583f5704939c1d2e1d67850a6d570406b2bdff7f702de37e16bf46b
- 1 0x39b05fe94d3d5794c0f67663db263d88cf5b5fdbae1f0b6bb7fb173ea7166312
Data
- 000000000000000000000000000000000000000000000000d34673dbb5bc12e8
- 0000000000000000000000000000000000000000000000000005bd9d7aadc459
Topics
- 0 0x18864aac33b9ba01ccc08ab0b244dd2cbacd5368fc51c60b85b9b45e5e13fe07
Data
- 000000000000000000000000000000000000000000000000d34673dbb5bc12e8
- 0000000000000000000000000000000000000000000000000005bd9d7aadc459
-
Address
- 0x48b62137edfa95a428d35c09e44256a739f6b557 (Apecoin: WAPE Token)
Name
Transfer (index_topic_1 address from, index_topic_2 address to, uint256 value)View Source
Topics
- 0 0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef
- 1: from 0xd7A4483115796E3F7A9Db030c388Ed061eE979ab
- 2: to 0xa7272D00ae33285994849bCF54681bc9AcA3324c
Data
- value :2283597446678486127
-
Address
- 0xcf800f4948d16f23333508191b1b1591daf70438 (Apecoin: ApeETH Token)
Name
Transfer (index_topic_1 address from, index_topic_2 address to, uint256 value)View Source
Topics
- 0 0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef
- 1: from 0xd7A4483115796E3F7A9Db030c388Ed061eE979ab
- 2: to 0xa7272D00ae33285994849bCF54681bc9AcA3324c
Data
- value :242378842391514
-
Address
- 0xcf800f4948d16f23333508191b1b1591daf70438 (Apecoin: ApeETH Token)
Topics
- 0 0x9d9c909296d9c674451c0c24f02cb64981eb3b727f99865939192f880a755dcb
- 1 0x000000000000000000000000d7a4483115796e3f7a9db030c388ed061ee979ab
- 2 0x000000000000000000000000a7272d00ae33285994849bcf54681bc9aca3324c
Data
- 0000000000000000000000000000000000000000000000000000b9c002124659
Topics
- 0 0xfe09e3206140532f1fd2fe73b1376e4619cbb24b51ab6893be36ea2422a2c973
- 1 0x000000000000000000000000a7272d00ae33285994849bcf54681bc9aca3324c
Data
- 000000000000000000000000000000000000000000000000b3957c145a797679
- 0000000000000000000000000000000000000000000000000004e12c41e0807f
- 0000000000000000000000000000000000000000000000001fb0f7c75b429c6f
- 0000000000000000000000000000000000000000000000000000dc7138cd43da
- 00000000000000000000000000000000000000000000000000000000000000a0
- 0000000000000000000000000000000000000000000000000000000000000005
- 5949454c44000000000000000000000000000000000000000000000000000000
-
Address
- 0x48b62137edfa95a428d35c09e44256a739f6b557 (Apecoin: WAPE Token)
Name
Transfer (index_topic_1 address from, index_topic_2 address to, uint256 value)View Source
Topics
- 0 0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef
- 1: from 0xd7A4483115796E3F7A9Db030c388Ed061eE979ab
- 2: to 0x4Cf08B14B7F29B2CA54DE9f8083866AB4F751669
Data
- value :12940385531178088057
Topics
- 0 0x57751fd4c58054428b0f51283238fe4afcc98de5cbf780a2e462c692218e45a1
- 1 0x000000000000000000000000d7a4483115796e3f7a9db030c388ed061ee979ab
- 2 0x000000000000000000000000a883b4e5d0826bc97993d6a2a2d4a4afd6a1fc31
Data
- 000000000000000000000000000000000000000000000000b3957c145a797679
Topics
- 0 0x57751fd4c58054428b0f51283238fe4afcc98de5cbf780a2e462c692218e45a1
- 1 0x000000000000000000000000d7a4483115796e3f7a9db030c388ed061ee979ab
- 2 0x000000000000000000000000060fa68ca72c8e3e8ed45340e3d533c4719461fd
Data
- 000000000000000000000000000000000000000000000000b3957c145a797679
Topics
- 0 0x57751fd4c58054428b0f51283238fe4afcc98de5cbf780a2e462c692218e45a1
- 1 0x000000000000000000000000d7a4483115796e3f7a9db030c388ed061ee979ab
- 2 0x0000000000000000000000008dadaf5c1f3e5373b711717c7088fb4bf79c4ee8
Data
- 000000000000000000000000000000000000000000000000b3957c145a797679
-
Address
- 0xcf800f4948d16f23333508191b1b1591daf70438 (Apecoin: ApeETH Token)
Name
Transfer (index_topic_1 address from, index_topic_2 address to, uint256 value)View Source
Topics
- 0 0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef
- 1: from 0xd7A4483115796E3F7A9Db030c388Ed061eE979ab
- 2: to 0x4Cf08B14B7F29B2CA54DE9f8083866AB4F751669
Data
- value :1373480106885247
-
Address
- 0xcf800f4948d16f23333508191b1b1591daf70438 (Apecoin: ApeETH Token)
Topics
- 0 0x9d9c909296d9c674451c0c24f02cb64981eb3b727f99865939192f880a755dcb
- 1 0x000000000000000000000000d7a4483115796e3f7a9db030c388ed061ee979ab
- 2 0x0000000000000000000000004cf08b14b7f29b2ca54de9f8083866ab4f751669
Data
- 00000000000000000000000000000000000000000000000000041c9561123953
Topics
- 0 0x311746e281c20c82d27b67c3b4248316f72a972f1cd47ed386b7dcb88c0dfb96
- 1 0x000000000000000000000000d7a4483115796e3f7a9db030c388ed061ee979ab
- 2 0x000000000000000000000000a883b4e5d0826bc97993d6a2a2d4a4afd6a1fc31
Data
- 0000000000000000000000000000000000000000000000000004e12c41e0807f
Topics
- 0 0x311746e281c20c82d27b67c3b4248316f72a972f1cd47ed386b7dcb88c0dfb96
- 1 0x000000000000000000000000d7a4483115796e3f7a9db030c388ed061ee979ab
- 2 0x000000000000000000000000060fa68ca72c8e3e8ed45340e3d533c4719461fd
Data
- 0000000000000000000000000000000000000000000000000004e12c41e0807f
Topics
- 0 0x311746e281c20c82d27b67c3b4248316f72a972f1cd47ed386b7dcb88c0dfb96
- 1 0x000000000000000000000000d7a4483115796e3f7a9db030c388ed061ee979ab
- 2 0x0000000000000000000000008dadaf5c1f3e5373b711717c7088fb4bf79c4ee8
Data
- 0000000000000000000000000000000000000000000000000004e12c41e0807f
Topics
- 0 0xc255550dd661a65506f3f455b9fe31c29738afe481cf6aff88cc2411c7301402
Data
- 00000000000000000000000000000000000000000000012da6ebd1cd3de159a2
- 0000000000000000000000000000000000000000000000000012692589bf860b
Name
Burn (index_topic_1 address owner, index_topic_2 int24 bottomTick, index_topic_3 int24 topTick, uint128 liquidityAmount, uint256 amount0, uint256 amount1)View Source
Topics
- 0 0x0c396cd989a39f4459b5fa1aed6a9a8dcdbc45908acfd67e028cd568da98982c
- 1: owner 0xd7A4483115796E3F7A9Db030c388Ed061eE979ab
- 2: bottomTick -78190
- 3: topTick -75260
Data
- liquidityAmount :813500673078125853851
- amount0 :5527655901479637576969
- amount1 :0
-
Address
- 0x48b62137edfa95a428d35c09e44256a739f6b557 (Apecoin: WAPE Token)
Name
Transfer (index_topic_1 address from, index_topic_2 address to, uint256 value)View Source
Topics
- 0 0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef
- 1: from 0x1EA5Df273F1b2e0b10554C8F6f7Cc7Ef34F6a51b
- 2: to 0xd7A4483115796E3F7A9Db030c388Ed061eE979ab
Data
- value :5527655901479637576969
Name
Collect (index_topic_1 address owner, address recipient, index_topic_2 int24 bottomTick, index_topic_3 int24 topTick, uint128 amount0, uint128 amount1)View Source
Topics
- 0 0x70935338e69775456a85ddef226c395fb668b63fa0115f5f20610b388e6ca9c0
- 1: owner 0xd7A4483115796E3F7A9Db030c388Ed061eE979ab
- 2: bottomTick -78190
- 3: topTick -75260
Data
-
Address
- 0x48b62137edfa95a428d35c09e44256a739f6b557 (Apecoin: WAPE Token)
Name
Transfer (index_topic_1 address from, index_topic_2 address to, uint256 value)View Source
Topics
- 0 0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef
- 1: from 0xd7A4483115796E3F7A9Db030c388Ed061eE979ab
- 2: to 0x28954e977a1FF440B0A002025c175246A75BBF7B
Data
- value :2787936102217093321087
-
Address
- 0x48b62137edfa95a428d35c09e44256a739f6b557 (Apecoin: WAPE Token)
Name
Approval (index_topic_1 address owner, index_topic_2 address spender, uint256 value)View Source
Topics
- 0 0x8c5be1e5ebec7d5bd14f71427d1e84f3dd0314c0f7b2291e5b200ac8c7c3b925
- 1: owner 0x28954e977a1FF440B0A002025c175246A75BBF7B
- 2: spender 0xaDdE3573aD2E87ee5EFa1E725f562f360b2E4Ceb
Data
- value :2787936102217093321087
-
Address
- 0x48b62137edfa95a428d35c09e44256a739f6b557 (Apecoin: WAPE Token)
Name
Transfer (index_topic_1 address from, index_topic_2 address to, uint256 value)View Source
Topics
- 0 0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef
- 1: from 0x28954e977a1FF440B0A002025c175246A75BBF7B
- 2: to 0x1d3a594EAf472ca2ceC2A8aE44478c06d6A37E22
Data
- value :2787936102217093321087
-
Address
- 0x48b62137edfa95a428d35c09e44256a739f6b557 (Apecoin: WAPE Token)
Name
Approval (index_topic_1 address owner, index_topic_2 address spender, uint256 value)View Source
Topics
- 0 0x8c5be1e5ebec7d5bd14f71427d1e84f3dd0314c0f7b2291e5b200ac8c7c3b925
- 1: owner 0x1d3a594EAf472ca2ceC2A8aE44478c06d6A37E22
- 2: spender 0xC69Dc28924930583024E067b2B3d773018F4EB52
Data
- value :2787936102217093321087
Name
Fee (uint16 feeZto, uint16 feeOtz)View Source
Topics
- 0 0x8a89de70856bccec096661388f305b9a75f5f65cb0d8a0e1e803c39dabedb57f
Data
- feeZto :9242
- feeOtz :9242
-
Address
- 0xcf800f4948d16f23333508191b1b1591daf70438 (Apecoin: ApeETH Token)
Name
Transfer (index_topic_1 address from, index_topic_2 address to, uint256 value)View Source
Topics
- 0 0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef
- 1: from 0x1EA5Df273F1b2e0b10554C8F6f7Cc7Ef34F6a51b
- 2: to 0x1d3a594EAf472ca2ceC2A8aE44478c06d6A37E22
Data
- value :1103062317518273883
-
Address
- 0xcf800f4948d16f23333508191b1b1591daf70438 (Apecoin: ApeETH Token)
Topics
- 0 0x9d9c909296d9c674451c0c24f02cb64981eb3b727f99865939192f880a755dcb
- 1 0x0000000000000000000000001ea5df273f1b2e0b10554c8f6f7cc7ef34f6a51b
- 2 0x0000000000000000000000001d3a594eaf472ca2cec2a8ae44478c06d6a37e22
Data
- 0000000000000000000000000000000000000000000000000ce6217c71764d9d
-
Address
- 0x48b62137edfa95a428d35c09e44256a739f6b557 (Apecoin: WAPE Token)
Name
Transfer (index_topic_1 address from, index_topic_2 address to, uint256 value)View Source
Topics
- 0 0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef
- 1: from 0x1d3a594EAf472ca2ceC2A8aE44478c06d6A37E22
- 2: to 0x1EA5Df273F1b2e0b10554C8F6f7Cc7Ef34F6a51b
Data
- value :2787936102217093321087
-
Address
- 0x48b62137edfa95a428d35c09e44256a739f6b557 (Apecoin: WAPE Token)
Name
Transfer (index_topic_1 address from, index_topic_2 address to, uint256 value)View Source
Topics
- 0 0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef
- 1: from 0x1EA5Df273F1b2e0b10554C8F6f7Cc7Ef34F6a51b
- 2: to 0x58095979B412a366687cA05CbE85fF56241bE21f
Data
- value :5153221091338075294
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 0xC69Dc28924930583024E067b2B3d773018F4EB52
- 2: recipient 0x1d3a594EAf472ca2ceC2A8aE44478c06d6A37E22
Data
- amount0 :2787936102217093321087
- amount1 :-1103062317518273883
- price :1581386025499768388921162467
- liquidity :23206040808722765445608
- tick :-78285
-
Address
- 0xcf800f4948d16f23333508191b1b1591daf70438 (Apecoin: ApeETH Token)
Name
Transfer (index_topic_1 address from, index_topic_2 address to, uint256 value)View Source
Topics
- 0 0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef
- 1: from 0x1d3a594EAf472ca2ceC2A8aE44478c06d6A37E22
- 2: to 0x28954e977a1FF440B0A002025c175246A75BBF7B
Data
- value :1103062317518273882
-
Address
- 0xcf800f4948d16f23333508191b1b1591daf70438 (Apecoin: ApeETH Token)
Topics
- 0 0x9d9c909296d9c674451c0c24f02cb64981eb3b727f99865939192f880a755dcb
- 1 0x0000000000000000000000001d3a594eaf472ca2cec2a8ae44478c06d6a37e22
- 2 0x00000000000000000000000028954e977a1ff440b0a002025c175246a75bbf7b
Data
- 0000000000000000000000000000000000000000000000000ce6217c71764d9d
-
Address
- 0xcf800f4948d16f23333508191b1b1591daf70438 (Apecoin: ApeETH Token)
Name
Transfer (index_topic_1 address from, index_topic_2 address to, uint256 value)View Source
Topics
- 0 0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef
- 1: from 0x28954e977a1FF440B0A002025c175246A75BBF7B
- 2: to 0xd7A4483115796E3F7A9Db030c388Ed061eE979ab
Data
- value :1103062317518273882
-
Address
- 0xcf800f4948d16f23333508191b1b1591daf70438 (Apecoin: ApeETH Token)
Topics
- 0 0x9d9c909296d9c674451c0c24f02cb64981eb3b727f99865939192f880a755dcb
- 1 0x00000000000000000000000028954e977a1ff440b0a002025c175246a75bbf7b
- 2 0x000000000000000000000000d7a4483115796e3f7a9db030c388ed061ee979ab
Data
- 0000000000000000000000000000000000000000000000000ce6217c71764d9d
-
Address
- 0x48b62137edfa95a428d35c09e44256a739f6b557 (Apecoin: WAPE Token)
Name
Approval (index_topic_1 address owner, index_topic_2 address spender, uint256 value)View Source
Topics
- 0 0x8c5be1e5ebec7d5bd14f71427d1e84f3dd0314c0f7b2291e5b200ac8c7c3b925
- 1: owner 0x28954e977a1FF440B0A002025c175246A75BBF7B
- 2: spender 0xaDdE3573aD2E87ee5EFa1E725f562f360b2E4Ceb
Data
- value :0
Topics
- 0 0xeec75b6a94cd53cc969f3c9dc257968b4735971a6b993af70561df50f53a5b2c
- 1 0x000000000000000000000000d7a4483115796e3f7a9db030c388ed061ee979ab
- 2 0x00000000000000000000000048b62137edfa95a428d35c09e44256a739f6b557
- 3 0x000000000000000000000000cf800f4948d16f23333508191b1b1591daf70438
Data
- 000000000000000000000000adde3573ad2e87ee5efa1e725f562f360b2e4ceb
- 0000000000000000000000000000000000000000000000972262b9d910f9917f
- 0000000000000000000000000000000000000000000000000f4edd5560cbbd5a
Topics
- 0 0x460bb16b10a1fdd3804e150af05662ffc889997563ab7f97f28a03fefd21a1be
Data
- 0000000000000000000000000000000000000000000000000000000000000020
- 0000000000000000000000000000000000000000000000000000000000000001
- 0000000000000000000000000000000000000000000000000000000000000000
- 0000000000000000000000000000000000000000000000000000000000000001
- 00000000000000000000000000000000000000000000002c1996f80da2defc9b
- 0000000000000000000000000000000000000000000000000000000000000001
- 0000000000000000000000000000000000000000000000000000000000000000
- 0000000000000000000000000000000000000000000000000000000000000000
-
Address
- 0x48b62137edfa95a428d35c09e44256a739f6b557 (Apecoin: WAPE Token)
Name
Transfer (index_topic_1 address from, index_topic_2 address to, uint256 value)View Source
Topics
- 0 0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef
- 1: from 0xd7A4483115796E3F7A9Db030c388Ed061eE979ab
- 2: to 0x1EA5Df273F1b2e0b10554C8F6f7Cc7Ef34F6a51b
Data
- value :2776561800523685159240
-
Address
- 0xcf800f4948d16f23333508191b1b1591daf70438 (Apecoin: ApeETH Token)
Name
Transfer (index_topic_1 address from, index_topic_2 address to, uint256 value)View Source
Topics
- 0 0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef
- 1: from 0xd7A4483115796E3F7A9Db030c388Ed061eE979ab
- 2: to 0x1EA5Df273F1b2e0b10554C8F6f7Cc7Ef34F6a51b
Data
- value :1043005638066481386
-
Address
- 0xcf800f4948d16f23333508191b1b1591daf70438 (Apecoin: ApeETH Token)
Topics
- 0 0x9d9c909296d9c674451c0c24f02cb64981eb3b727f99865939192f880a755dcb
- 1 0x000000000000000000000000d7a4483115796e3f7a9db030c388ed061ee979ab
- 2 0x0000000000000000000000001ea5df273f1b2e0b10554c8f6f7cc7ef34f6a51b
Data
- 0000000000000000000000000000000000000000000000000c32584e17767020
-
Address
- 0x48b62137edfa95a428d35c09e44256a739f6b557 (Apecoin: WAPE Token)
Name
Transfer (index_topic_1 address from, index_topic_2 address to, uint256 value)View Source
Topics
- 0 0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef
- 1: from 0x1EA5Df273F1b2e0b10554C8F6f7Cc7Ef34F6a51b
- 2: to 0xd7A4483115796E3F7A9Db030c388Ed061eE979ab
Data
- value :2664
Name
Mint (address sender, index_topic_1 address owner, index_topic_2 int24 bottomTick, index_topic_3 int24 topTick, uint128 liquidityAmount, uint256 amount0, uint256 amount1)View Source
Topics
- 0 0x7a53080ba414158be7ec69b987b5fb7d07dee101fe85488f0853ae16239d0bde
- 1: owner 0xd7A4483115796E3F7A9Db030c388Ed061eE979ab
- 2: bottomTick -79700
- 3: topTick -76780
Data
- sender :0xd7A4483115796E3F7A9Db030c388Ed061eE979ab
- liquidityAmount :764807742592044909903
- amount0 :2776561800523685156576
- amount1 :1043005638066481385
Topics
- 0 0x4d0eef27f696d97f5a16d5591119df5ae2eacc6aebf22b92bddbcd42a1fea8f2
Data
- 0000000000000000000000000000000000000000000000000000000000000020
- 0000000000000000000000000000000000000000000000000000000000000001
- fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffec8ac
- fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffed414
- 000000000000000000000000000000000000000000000096848916b8ad41e14b
- 0000000000000000000000000000000000000000000000000f12e5e4ba873040
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.