Due to the adjustment of the company's development strategy, CloverPool (formerly BTC.com) has started anew and has been fully updated to a new brand and new domain name to continue to provide high-quality services to our customers.
Txハッシュ
103d2c184269bcc28b64d501c1427897776580d6007e10249c9ee5a39db39ba3
概要
ブロック高度
確認数
77,453
確認時間
2023-06-07 19:15:25
サイズ (rawtx)
6,054 Bytes
バーチャルTxサイズ
5,892 Bytes
Weight
23,568
ステータス
確認済
入力
4.37328423 BTC
出力
4.37032867 BTC
Sigops
234
手数料
0.00295556 BTC
マイニング料率(BTC/kVB)
0.00050162 BTC
他のブロックチェーンブラウザ
Tx
入力 (2)4.37328423 BTC
出力 (176)4.37032867 BTC
スクリプト入力
P2WPKH_V0
(witness)
30440220739215e46ae2cb9c3d2c596ed34c7edcbbe96b4d38371c38f3d622896c10724a022036a9822facab2160b0e8b931ba7e308964e50ed0485de05cd8ed0d41bbf6f67401
035be559854543566d0f6a2a34da8deb47496e1a07ce63cead9c5b964db32b6c43
P2WPKH_V0
(witness)
304402201c74a6eda32aa1b98f8e169b23435d927744bfc41e1c0870458dedf81ec776d602202f3889b7c31de2d29f69659110cc3d709078faf6e46ed2bffe1603e439093c9101
039beb7d3e80473697c98aef4320b4be08b3d77a75122c080afcf676a8518dfc19
スクリプト出力
P2SH
OP_HASH160 d7065eae551c05d38f820c8edbf9a0cf7496a5f7 OP_EQUAL
P2PKH
OP_DUP OP_HASH160 ceb9d2e91f6ce358224d99b4d4462b317c4a559f OP_EQUALVERIFY OP_CHECKSIG
P2SH
OP_HASH160 b5ec30c9630cfaa92b6e0e5e4905bd8ec6799dce OP_EQUAL
P2WPKH_V0
OP_0 e4746011e565b61f016b92bdf6337557e423a3ab
P2PKH
OP_DUP OP_HASH160 136460e43d3c03b800a997ac3df81c382bba508a OP_EQUALVERIFY OP_CHECKSIG
P2WPKH_V0
OP_0 8c18c412a114d987c9d3dc648c8f2f05798b9697
P2PKH
OP_DUP OP_HASH160 3ae3610e615eb258aeb46f0c4ed035f414f760c3 OP_EQUALVERIFY OP_CHECKSIG
P2SH
OP_HASH160 9c3caaed33eb016e8e116830eab1b5c297bfb944 OP_EQUAL
P2WPKH_V0
OP_0 8b35e096b9c656993d0bd8c7195dfe3ff5b1ca23
P2WPKH_V0
OP_0 ecb6996b264724ce885872eae3681407572e263d
P2PKH
OP_DUP OP_HASH160 040b15e80c3bf3736ce6d5ebb55b7066d9833991 OP_EQUALVERIFY OP_CHECKSIG
P2SH
OP_HASH160 7a5e06b5578f006e379222eb57f722b29dc4ac1e OP_EQUAL
P2WPKH_V0
OP_0 ffafdf36e78cc53797bf9a8fb1c9b4af3a4de19c
P2PKH
OP_DUP OP_HASH160 ee33328d025639d41b1b2537d30262751558222c OP_EQUALVERIFY OP_CHECKSIG
P2SH
OP_HASH160 d34136573fec4ef5109c6e2e1840cf53a220d536 OP_EQUAL
P2SH
OP_HASH160 c778cadd942afb6db32f4ee6ab30c9b5af49a0d8 OP_EQUAL
P2WPKH_V0
OP_0 93a03dcef8e7c75d2c5e29d89c99c3ec66b3bec7
P2PKH
OP_DUP OP_HASH160 a720ecaf6c3e2b16ead97e20351f6439b4dd94ab OP_EQUALVERIFY OP_CHECKSIG
P2PKH
OP_DUP OP_HASH160 58b067b5582f745b594fc6cbd40fc6edc174f966 OP_EQUALVERIFY OP_CHECKSIG
P2PKH
OP_DUP OP_HASH160 647b9f33f94d169cdf4b927f90e7542158a111a3 OP_EQUALVERIFY OP_CHECKSIG
P2PKH
OP_DUP OP_HASH160 da6770f30def3dc8d87dde0a16defe26ba749b5e OP_EQUALVERIFY OP_CHECKSIG
P2PKH
OP_DUP OP_HASH160 ff1fbc65d23cba17dad1a55fd0dc7846887f4910 OP_EQUALVERIFY OP_CHECKSIG
P2PKH
OP_DUP OP_HASH160 9e5030a933221cae0c1d3ec03124e3f43d12d1eb OP_EQUALVERIFY OP_CHECKSIG
P2WPKH_V0
OP_0 03858830e6832f1c1e6c83c18c3507d2b2a1d693
P2PKH
OP_DUP OP_HASH160 ba6644b7276f1aa0639cc1b5b0002224bc10c009 OP_EQUALVERIFY OP_CHECKSIG
P2SH
OP_HASH160 58a66dd3cf390080b55945cd6eb94534272ecb80 OP_EQUAL
P2PKH
OP_DUP OP_HASH160 6c1429692655ccb3b27edc3b112509d210bc6360 OP_EQUALVERIFY OP_CHECKSIG
P2SH
OP_HASH160 ee36597fff25624c57dc20f552e7bbe366725e82 OP_EQUAL
P2WPKH_V0
OP_0 b15f214990999a198fc41155e4f7f58f267afccf
P2SH
OP_HASH160 6fed4b1aabc577d82d96a8384e85428ab86e34c8 OP_EQUAL
P2SH
OP_HASH160 fddc311612168864d511ecc06050fe096efe09a4 OP_EQUAL
P2PKH
OP_DUP OP_HASH160 f803707b5a749916d5429b73b9faf1b0a8fca1bd OP_EQUALVERIFY OP_CHECKSIG
P2SH
OP_HASH160 5a2a3dbfc5bcbf929671aa9ba23cabefbd7ee1e8 OP_EQUAL
P2WPKH_V0
OP_0 c32f164da8a48c5695a4e324b29b1f0224dd9c78
P2SH
OP_HASH160 09b4ef883b0fbf6b68bbdcea5d03fd9d3cbfba6d OP_EQUAL
P2SH
OP_HASH160 a6d7266cd210d6cf4d9846fb6e24aabd4f94e631 OP_EQUAL
P2SH
OP_HASH160 9704a8ce1f3b432c0cf4dd2e8f3da5ebb243c370 OP_EQUAL
P2SH
OP_HASH160 602ca984c4dacaba99add7af36c4ecc6c3c8cc9a OP_EQUAL
P2SH
OP_HASH160 3e40af758475fb972e46dbe15fa8ea35a5a4f0c1 OP_EQUAL
P2SH
OP_HASH160 02b27a72bcca48ca8afede7232f1dd9d14761d09 OP_EQUAL
P2PKH
OP_DUP OP_HASH160 2088698e7c5b0a3a824f665fc0ca07e407ea5665 OP_EQUALVERIFY OP_CHECKSIG
P2PKH
OP_DUP OP_HASH160 bc6e59a9477a413c2265f64eef3f7db4b9e0d772 OP_EQUALVERIFY OP_CHECKSIG
P2SH
OP_HASH160 c98f0380ec785a095d670216dba1317e16b10283 OP_EQUAL
P2SH
OP_HASH160 e5ce2d8eedf0028b145e2fd0aedc79d17e9e7021 OP_EQUAL
P2SH
OP_HASH160 ff82d9a154d59db305c040740043bc94a31af9c0 OP_EQUAL
P2SH
OP_HASH160 9e70cac89d621b6622a62b555e7b7de9831247f4 OP_EQUAL
P2SH
OP_HASH160 d5e8a25ee4d0697faaf709cb582bd137364ac9bf OP_EQUAL
P2WPKH_V0
OP_0 3c2280633ef8d5240af1261df3779231222f89eb
P2PKH
OP_DUP OP_HASH160 d5c56ba2ea4cfc26072ef06eb46f19a62267b1b8 OP_EQUALVERIFY OP_CHECKSIG
P2PKH
OP_DUP OP_HASH160 1285793ecf649725608dcde45e394612fadbaf4c OP_EQUALVERIFY OP_CHECKSIG
P2WPKH_V0
OP_0 eb16658799ca8e9197be82671bf200f474daf3ec
P2PKH
OP_DUP OP_HASH160 d0717ffc2c6e0915f4b7ba27d9156bb511cf1841 OP_EQUALVERIFY OP_CHECKSIG
P2SH
OP_HASH160 8e187ed9cd5f3e3af90cda42abfda978b975dc29 OP_EQUAL
P2SH
OP_HASH160 0f0883eeea530939e54e9acfb3d9de5e1ac82df4 OP_EQUAL
P2PKH
OP_DUP OP_HASH160 7122926dc4000c62e2eff4e7f3ed1b5f735ba716 OP_EQUALVERIFY OP_CHECKSIG
P2PKH
OP_DUP OP_HASH160 ced701d8602a5e87bdd2d720a60af8c1c11f8a72 OP_EQUALVERIFY OP_CHECKSIG
P2SH
OP_HASH160 be4d550e061568b0650be4ec5a5987b19d2b03b9 OP_EQUAL
P2SH
OP_HASH160 eb7d1165cf536e8be04834159d65de2a7f9c23bf OP_EQUAL
P2WPKH_V0
OP_0 25531aa8b3d622d4d4cad3bb251d80c5fe02d928
P2PKH
OP_DUP OP_HASH160 eefe5f2d712fb160dad276df1577a89c6698c2d0 OP_EQUALVERIFY OP_CHECKSIG
P2SH
OP_HASH160 bda454b24c9a8e7f290929875460be7f1a5a82c2 OP_EQUAL
P2WPKH_V0
OP_0 5ba736488022a9dc1f49508ea657a6a55f545a90
P2PKH
OP_DUP OP_HASH160 57afee914adaf0987055b7337b59d258a838283a OP_EQUALVERIFY OP_CHECKSIG
P2WPKH_V0
OP_0 3ddaefc7dfd430a97663e33a7442c05bfcb4be8d
P2WPKH_V0
OP_0 d40d9b53949ac890253090f9090a7c9b917a2dc9
P2SH
OP_HASH160 40b9612b6e8887b0e170c65828083450e4b1147e OP_EQUAL
P2SH
OP_HASH160 4d5f5edefa8e18122e9d2bf542dee9be48ccde53 OP_EQUAL
P2WPKH_V0
OP_0 44ef02e5a48002dfba4e15b8c8e8530d7d58ad33
P2SH
OP_HASH160 3987f36fd7e64657d3b10f56ed2ca62bd5121cbd OP_EQUAL
P2WPKH_V0
OP_0 ba58813a74a53310b4417dd9e2ccab1ce87d2618
P2PKH
OP_DUP OP_HASH160 2086d54fbf6088fb00ce67350f261b5cf8fc7012 OP_EQUALVERIFY OP_CHECKSIG
P2SH
OP_HASH160 bd0bdee6a137bf9a63d272afa60bd8197d28d99f OP_EQUAL
P2SH
OP_HASH160 3d41edee59e835e1293db734c564230bee3b8118 OP_EQUAL
P2PKH
OP_DUP OP_HASH160 fd074c45978fbc8b5192030e851746940e6c6978 OP_EQUALVERIFY OP_CHECKSIG
P2SH
OP_HASH160 da9b7344e481a1e51d4cdae1d32e3904f25b1e7c OP_EQUAL
P2PKH
OP_DUP OP_HASH160 e9ad0971b60d1bdd069084c8647b5312664376e3 OP_EQUALVERIFY OP_CHECKSIG
P2WPKH_V0
OP_0 e8097f1896d67df879c00dd597db6c58f0fc6869
P2SH
OP_HASH160 48788c403a55b11612dd6e39d1f1acb5a009e91d OP_EQUAL
P2SH
OP_HASH160 ae97bdca9af231ee1c3e25a58775c05af6a492b3 OP_EQUAL
P2PKH
OP_DUP OP_HASH160 4a02958d8a16e0959acfdb158b03975dde088727 OP_EQUALVERIFY OP_CHECKSIG
P2PKH
OP_DUP OP_HASH160 7b285c36dfc8cf658147e8f3329c3e8de78a42f6 OP_EQUALVERIFY OP_CHECKSIG
P2SH
OP_HASH160 136c48c1ec9ee7a0c5d079199a0c8dd111700615 OP_EQUAL
P2SH
OP_HASH160 dd9afe9a886bc207641f2a2109f33e07605f41b1 OP_EQUAL
P2WPKH_V0
OP_0 26468e0dca4267248568be74e559a9b39cfb5dac
P2SH
OP_HASH160 1a00cb9fb80845a0e1d706e1f0acfe2208a9405c OP_EQUAL
P2SH
OP_HASH160 3488c3894f285bbff1fff2b732ae1df973b4e2d7 OP_EQUAL
P2WPKH_V0
OP_0 08c01dadef1f2621a249cfac6585d99cf31f65a2
P2SH
OP_HASH160 43841b37665da2bc3873c8c3c2c92d876fd48718 OP_EQUAL
P2SH
OP_HASH160 8671ac8e4d7153488e8c3c4fd265a757de4ed5dd OP_EQUAL
P2WPKH_V0
OP_0 67359dc6bb01b1bea4175a185535a0beaff7e8e9
P2PKH
OP_DUP OP_HASH160 2a550251c685238b842832553498368d36da6a4b OP_EQUALVERIFY OP_CHECKSIG
P2SH
OP_HASH160 c5e5474f2058f1b61329d8610dcbc8d9760483af OP_EQUAL
P2WPKH_V0
OP_0 3619045fc8ec5c1c2b627a2a99fba1ebf333d01f
P2PKH
OP_DUP OP_HASH160 5018a023641b10c8f465ed0c3ce238d66821e59b OP_EQUALVERIFY OP_CHECKSIG
P2WPKH_V0
OP_0 3caeea0e6376bfcab771a0b0e7dca264748fa0bd
P2SH
OP_HASH160 6ddc878079988768f1064ab78d2041c2585a0f58 OP_EQUAL
P2WPKH_V0
OP_0 af5b5f89af6e2e7f03b8407794300114b409082a
P2WPKH_V0
OP_0 9cb0fd507d64912c592b5b990b4fc54ebe9486e6
P2SH
OP_HASH160 64631d882da39653536d945f4515ef50b57b7beb OP_EQUAL
P2WSH_V0
OP_0 3602c030a475457dcd8357d1b7f76c206c67d314a2ccd69ff78148e7c31a0fca
P2WPKH_V0
OP_0 4546621e688d2f0acbcd57878c4cd2b8c65766c3
P2PKH
OP_DUP OP_HASH160 c0f7b658502ed69faf1b63e33b7b5a4b36638570 OP_EQUALVERIFY OP_CHECKSIG
P2SH
OP_HASH160 e2986f725c50f2691b05b299aa88f09bfee05e85 OP_EQUAL
P2SH
OP_HASH160 7c779b833f63f88983c309746e33da675cb3f57a OP_EQUAL
P2WPKH_V0
OP_0 0a00b8d389b7cc284978d93806c132498a3ea056
P2SH
OP_HASH160 a96eeb77e699ac86c25114f8247e7a553c8fbf0c OP_EQUAL
P2WPKH_V0
OP_0 46ae7e0f89534d1ff3818293eb32e98f61c8c6c8
P2WSH_V0
OP_0 ce034b6bd6d9ef8cf69a833012a062326a071862bf428b7dc134d9e160a57851
P2WPKH_V0
OP_0 2b8fd766c698c672af0cbe6cb637e7dff03daa0d
P2WSH_V0
OP_0 3b2811059a017f940ed1638f3c91dddce5e659ad2058c42c4c5cba97fdaf31f2
P2PKH
OP_DUP OP_HASH160 adae8a620ac75b1e2aa2822b3c564cc88d700c12 OP_EQUALVERIFY OP_CHECKSIG
P2SH
OP_HASH160 1e52b3530a00e213985187b0aba7dfd2a37e695a OP_EQUAL
P2PKH
OP_DUP OP_HASH160 6fe591f5424e06ed88e58ae31541a15ae3bbc2ae OP_EQUALVERIFY OP_CHECKSIG
P2WPKH_V0
OP_0 1f9774e26993b0c4d6742e0dffd6f0722a6395a5
P2WPKH_V0
OP_0 5cea0e051f27e47d71214a4fda5e46073e135e0e
P2WPKH_V0
OP_0 ed4384d97289c78df31c11b87830d906ee1d6c78
P2WPKH_V0
OP_0 700934cd953c060d3a8f01fc8baa97aff0c7971b
P2PKH
OP_DUP OP_HASH160 267691a2e2dc3a6c12a3a84c24b44c6a74080cd0 OP_EQUALVERIFY OP_CHECKSIG
P2WPKH_V0
OP_0 1c528c085656de5c1f0eb784dc8e13f374fc603c
P2PKH
OP_DUP OP_HASH160 fc7cc319d344a0d8ef574839ed48a644eb9235f4 OP_EQUALVERIFY OP_CHECKSIG
P2PKH
OP_DUP OP_HASH160 bf408ea9d8983a983bdb1de9835e5ecad1c9b4ea OP_EQUALVERIFY OP_CHECKSIG
P2WPKH_V0
OP_0 160c4dafd64e587420a01f30a92a8f0cd2708bab
P2SH
OP_HASH160 eac658e22ae3beb1aaa7cde82b8fa37805c4b9f7 OP_EQUAL
P2PKH
OP_DUP OP_HASH160 49fd8a519f9b85f6282126bc0867af103532a4c2 OP_EQUALVERIFY OP_CHECKSIG
P2PKH
OP_DUP OP_HASH160 2b95c65d3400294dc1a031a9e78fb2d55f8a8b2e OP_EQUALVERIFY OP_CHECKSIG
P2WPKH_V0
OP_0 056ce7dd18e02acebe004a1a04b3695a87ed1615
P2WPKH_V0
OP_0 64c2d59d154d7917a985907e7fc5362fef0ea51d
P2PKH
OP_DUP OP_HASH160 41b0558b62433b64ac26bd96cbccaad5f455766b OP_EQUALVERIFY OP_CHECKSIG
P2PKH
OP_DUP OP_HASH160 a850294b2a8b5ed555f8de4706f2bd4706df24b0 OP_EQUALVERIFY OP_CHECKSIG
P2PKH
OP_DUP OP_HASH160 b25c8086c7677cd086ca19bd338e89997f86ffd2 OP_EQUALVERIFY OP_CHECKSIG
P2SH
OP_HASH160 6942160a2d60301fd48cc8c4f100b7f8f59d5774 OP_EQUAL
P2SH
OP_HASH160 1d2e635e4e8262d6d1f8d2d0686c8eac4fc34cc0 OP_EQUAL
P2PKH
OP_DUP OP_HASH160 384094d70fdc1557a82d4d1e21508712dcdea173 OP_EQUALVERIFY OP_CHECKSIG
P2PKH
OP_DUP OP_HASH160 41ebb5db81252a6a1a08e446cdc226c247d8b9b2 OP_EQUALVERIFY OP_CHECKSIG
P2SH
OP_HASH160 f3ffedf55c3d30e4042acbe962ffe7633e22ecd7 OP_EQUAL
P2PKH
OP_DUP OP_HASH160 3835c453e2726389a28a23eccecf5d29f47965ee OP_EQUALVERIFY OP_CHECKSIG
P2WPKH_V0
OP_0 028fd6701a6b35e394edc3cade05b595e9c7a27f
P2SH
OP_HASH160 a953c605cb1bf12bbfdba4f2c4b80df1764f93f4 OP_EQUAL
P2WPKH_V0
OP_0 9c143a575848dc9985feaeefe99deddc4bbe2a9f
P2PKH
OP_DUP OP_HASH160 30db3a68e2508dd10e5f095811d79a872594f6aa OP_EQUALVERIFY OP_CHECKSIG
P2PKH
OP_DUP OP_HASH160 a768670bb74dc0366851de66cd5976cba7262b50 OP_EQUALVERIFY OP_CHECKSIG
P2SH
OP_HASH160 55069213f815015d4bf144811c8aa305099a35dc OP_EQUAL
P2PKH
OP_DUP OP_HASH160 3aaa33fb76e7086fe01ad000d569ac3594676d2a OP_EQUALVERIFY OP_CHECKSIG
P2PKH
OP_DUP OP_HASH160 067331c9971453a677a1945d596c99b3aad309f0 OP_EQUALVERIFY OP_CHECKSIG
P2PKH
OP_DUP OP_HASH160 c5ae20e498b9b4355d64e6dbb51cb63a0a70cb91 OP_EQUALVERIFY OP_CHECKSIG
P2SH
OP_HASH160 eec2bd446042417ecfa2814e9f14e53042745b96 OP_EQUAL
P2PKH
OP_DUP OP_HASH160 edc341505aeeda324b2eff2c6f1ee5707ff7de5b OP_EQUALVERIFY OP_CHECKSIG
P2PKH
OP_DUP OP_HASH160 42ce7a3fa64332da3d047bd49cf8aeb6758b9c3d OP_EQUALVERIFY OP_CHECKSIG
P2SH
OP_HASH160 9b910e9ecf60eeb396e15cfd189c38424ded987b OP_EQUAL
P2SH
OP_HASH160 51b5c03d004732494882acd17dc19fb7cc7ded01 OP_EQUAL
P2SH
OP_HASH160 6e2a7622736b3d39e7b66be61cab3f2fcb64087d OP_EQUAL
P2PKH
OP_DUP OP_HASH160 6ae0f5da95fc4d16ae1be699760df7c65581084c OP_EQUALVERIFY OP_CHECKSIG
P2PKH
OP_DUP OP_HASH160 9f5347843980d882563a204e706eb883ed2df02e OP_EQUALVERIFY OP_CHECKSIG
P2PKH
OP_DUP OP_HASH160 b13b75ce931d1d0b9d8a397de51904e92e93c215 OP_EQUALVERIFY OP_CHECKSIG
P2PKH
OP_DUP OP_HASH160 3ef7afa1f03aeb13244d275b59792f25942b3f2a OP_EQUALVERIFY OP_CHECKSIG
P2SH
OP_HASH160 44cf75028d4e438d17f5e72223f1ffb6b84bdc65 OP_EQUAL
P2SH
OP_HASH160 8a753c9534fe9b15ceb2500e95f4f9fa71d51597 OP_EQUAL
P2WPKH_V0
OP_0 a3bc452e76993f28b1f2d2f099ac3e533acab561
P2SH
OP_HASH160 b2fb85a5704086eebef63738f79cd9a0336648c8 OP_EQUAL
P2SH
OP_HASH160 ca8b7efe8412f1ed3f1f9bc1d5e7483b31b41e4a OP_EQUAL
P2WPKH_V0
OP_0 9727e2ad6ce2096c9d7cb811760cfcc648225341
P2PKH
OP_DUP OP_HASH160 d6ad6775c2ff003eebc479e0862a7d4dbd5c85e1 OP_EQUALVERIFY OP_CHECKSIG
P2WPKH_V0
OP_0 22610731624a213f1bc7db32f5ecc77330ccf3f0
P2PKH
OP_DUP OP_HASH160 264ebaaba2e3c82efe55c2476e52bbd31ee6752e OP_EQUALVERIFY OP_CHECKSIG
P2WPKH_V0
OP_0 4435eb5db3a0c9cde36cb1e3173583a5c18bf3f0
P2SH
OP_HASH160 a78fadb1edda5757061382333e90e59ec95c7b5d OP_EQUAL
P2SH
OP_HASH160 99994feb552936f5da5befb851f3b3c27248b5e8 OP_EQUAL
P2SH
OP_HASH160 8cf148b4b2b52cc8e95bd94e86c7807aa4f149d8 OP_EQUAL
P2WPKH_V0
OP_0 732e9d2adc338459382f70b8489d60e5bb48fb9a
P2SH
OP_HASH160 30df97537a7527706fe20b0d34387d037fdce447 OP_EQUAL
P2SH
OP_HASH160 682cb265139d3197de9d50c2620e8275a26cc31c OP_EQUAL
P2PKH
OP_DUP OP_HASH160 66fa1e029ed221f3f50488dd6341257f59bc0bee OP_EQUALVERIFY OP_CHECKSIG
P2WPKH_V0
OP_0 63edd81feff2c8bf6e69d35b5e7eeb8c425dff06
P2SH
OP_HASH160 43a14e980178aaf6567e9b7d596ff023590bb23f OP_EQUAL
WITNESS_V1_TAPROOT
OP_1 a8de57311c6a616c70d828e10bf006d7c9eb02f9cab907eda00e0e33b3536411
P2WPKH_V0
OP_0 3d3f2e60a9266427127d26c53e199dfe545d47f4