Block at Slot 67044

Epoch:

2,095

Slot:

67,044

Status:

Proposed

Time:

2024-12-29 02:38:48 +0000 UTC ()

Proposer:

icelandcalling-node2

Block Root:

0x2bfb1c583415f6929af40be7d2063a62c6f20fc7af53ef80791e0ee6e8a063b9

Parent Root:

0xc907f0dc9b4f839e8f2186fa24ecac1411af1266bf2a5d7ad1e2bb6b0f65c920

State Root:

0xb84a1b990ab49d00b6eeb717b6b7114ed27c78499e94ee0f621bf4648e9ffa11

Signature:

0x965791704cfc85034e404056b3a5ad81f2654368849376f7180bf4eb1d3e3eac6f36ded99e3f51aaae7c74cafa572fba0c61c1d2ff3e700739df91e306bce13b138071eb13bb59cbfdba5798d8908745b9f55de557704441a8562813f5433895

Randao Reveal:

0x802cc74a91737d473684030319cdc5381cecc9b4b168d4b8ffce456f48279af16099897e5541c487dc0c83553d808dba0b5a5d1a5c262145939decda297902c65c0d61a29dcbec63edc20b8ae018893ce94d2c45c8671b34946c67b0aa2a4f61

Graffiti:

0x42793a20526f636b657420506f6f6c0000000000000000000000000000000000

Hex UTF-8

Eth 1 Data:

Block Hash:

0xbf7314753062019d0f6871d8bee73407ea2648bd405c89599be0bfb6f6f7b48f

Deposit Count:

3,002

Deposit Root:

0x08c9248b85842304ca5bf554909ab96a72a04a2ebb99355dbd479df2cc2622fc

Sync Aggregate:

Participation:

92.58 %

Bits:

11111111 11111111 11101111 11111110 11111111 11010111 11111111 11011111
11111110 11110110 11111111 11111111 11111111 11111111 11111111 01111111
11111111 10111011 01111111 11111111 11111011 11011111 11111101 11111111
11111110 11001111 11111110 10111111 11111111 11111111 11101111 11111111
11111111 11110111 10101111 11111111 11111111 01111111 01111111 11111101
11111111 11111101 11111101 11111110 10111111 11111111 11111111 10111111
11111111 11111101 11111111 11101111 11011111 11111111 11111101 11011111
11111111 11111111 11111111 11111111 11111111 11011111 11111111 11111111

Signature:

0x81be801b117713d6040ff7fa2f5965b6d50aa657539f33002c4efcc220d1de6acce4d4fe9df135667f05dd735f8f1c230d4aa8519f066b1be607f500e54cc1ede282edcea8423e6f2f4ba3874afcf577a2b5d26af828d7ceefcd99391efbd49a

Execution Payload:

Parent Hash:

0xa0541d7b3bdb8c802dde3544077568688d999d5b2c94d2052be1f5a8818889b8

Fee recipient:

State Root:

0x7be05ed88fa2c852028c098a40c2d50c17ff3f14b73286895f95a0e5de58c36d

Receipt Root:

Logs Bloom:

0x00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000

Block Randomness

Block Number:

61982

Gas Limit:

30000000

Gas Used:

Timestamp:

1735439928

2024-12-29 02:38:48 +0000 UTC ()

Block Extra Data

0x4e65746865726d696e64

Base fee per gas:

Block Hash:

0x20eab3d194ca34ce517ba64a5f185b1a29e6e3cb3e90f18870933093b8b810c0

Transactions:

Attestations:

Votes:

877

Voting Validators:

877

Voluntary Exits:

Slashings:

0 attester & 0 proposer slashings

Deposits:

Showing 14 Attestations

Attestation 0

Slot:

67043

Committee Index:

Aggregation Bits:

11111111 11111111 11110111 11110111 11111111 11111111 11111111 1111111
11111111 11111111 11111111 11111111 11111111 11111111 11111111 1111111
111111

Validators:

17580 25830 20358 28251 6539 8993 21250 3683 22522 13571 6161 6675 21998 8259 15652 7126 22845 13193 13618 21107 13752 6622 4652 28650 21364 28981 7593 17425 8763 13515 13997 5247 12366 27608 9219 15072 25760 5962 4795 25982 15917 18298 21572 26195 13224 29695 5216 27692 22351 11580 17068 9562 25944 17398 7870 4744 5106 27091 11455 1390 2678 5533 23149 6719 15230 29528 15930 10375 21655 7489 19800 11448 22184 6901 4664 1845 26588 19826 11183 5421 13326 19367 6931 7553 26678 16743 3661 21934 9446 25788 6106 29068 23971 2177 29363 20195 19635 6778 14362 27436 1285 14821 2632 16489 19639 11061 10125 2097 28972 8554 17557 2034 28549 3006 15357 28365 14178 8364 16794 8426 6748 9991 27392 9240 23981 14492 23732 7482 6179 25205 27979 17254

Beacon Block Root:

0xc907f0dc9b4f839e8f2186fa24ecac1411af1266bf2a5d7ad1e2bb6b0f65c920

Source:

Epoch 2094 (0x851e63a8f7aba63e02c3413f1ebe1ee2c07809e81946d98262bf9a0e3fc05f21)

Target:

Epoch 2095 (0xaec33ec58970f235f29c98f1d02c4601981560080e9af4ec91f6ea5198ac9e04)

Signature:

0x91a3dba93ba39e7f903bae79f785308b9a588612b787380171db352fda2672601f8e275e40f70566f0bad1032f87b1dd157c60da97501e2ca3f33286e690f91a18f60b76c2f01e7c220ab5cfca9db2141fd5f9243702cfe9857d14ab1840a4c6

Attestation 1

Slot:

67043

Committee Index:

Aggregation Bits:

11111111 11011111 11111101 11111111 11111111 11101111 11111111 1111111
11111111 11111111 11111111 11111011 11011111 11111111 11111111 1111111
111111

Validators:

13347 13621 11798 3019 5102 21630 20957 29114 18754 9619 12372 14228 16186 1354 14541 29064 21162 4426 6105 17546 16901 29002 16574 29709 2326 10684 2266 7256 11264 4408 14922 6118 21393 7842 5064 2475 22750 19970 17806 15902 22753 11232 22765 2120 4942 6512 11119 15056 27935 26916 11568 15976 28524 5982 2042 15608 25661 5604 1993 3852 25310 27527 19420 27611 1111 29325 21161 17420 28526 29032 4979 25574 16015 26975 11400 10377 14143 14433 19498 13648 8053 21222 2765 18594 29992 28874 17942 9363 13542 14383 25194 20327 15257 20207 14031 9461 21749 29845 22839 14343 23637 13431 23063 23805 17342 19451 13253 16372 26862 28980 23244 18736 6323 8227 1944 6557 18293 21429 12130 6658 11036 18066 13379 27294 19905 28330 21318 14184 3532

Beacon Block Root:

0xc907f0dc9b4f839e8f2186fa24ecac1411af1266bf2a5d7ad1e2bb6b0f65c920

Source:

Epoch 2094 (0x851e63a8f7aba63e02c3413f1ebe1ee2c07809e81946d98262bf9a0e3fc05f21)

Target:

Epoch 2095 (0xaec33ec58970f235f29c98f1d02c4601981560080e9af4ec91f6ea5198ac9e04)

Signature:

0x960216c42c148921384136a10929c96c980970c0537075433c46f5665f538e061398b736106bb9701020dab193ea7ab70eb56c48ddee2d1d29a9b781308a7171561608141482bd73b761eb497d23db4dcf1a07ba6d33ac7cfcd9cc40e8530907

Attestation 2

Slot:

67043

Committee Index:

Aggregation Bits:

11111111 11111111 11111100 11111111 11111111 11111111 11111111 1111101
11101101 11111111 11111111 11111111 11111111 11110110 11111111 1111111
111111

Validators:

27096 8746 2426 25571 4901 14765 20062 25446 21769 9985 14159 5964 3939 29016 13875 18699 11174 4290 5711 20077 25561 13209 10545 17351 5607 8154 27035 15866 28338 5180 13878 21702 8714 6214 12847 1015 18077 25842 23887 24063 3538 2409 23866 5518 14014 21260 25492 18305 26620 28355 5727 20224 16463 23544 11316 18130 20386 2942 18050 1366 7107 25569 23589 26977 18895 10190 3459 27220 15782 16139 6032 5230 14308 26704 18952 22155 22191 27923 3387 2344 12283 29063 28853 10782 17298 20487 26035 7520 27034 19139 11814 7567 11824 6834 19952 27641 28099 9080 21293 12795 22968 20836 26099 2059 28407 6041 29183 23143 9881 27458 27246 29418 29766 3197 18568 21427 8806 25443 20317 6055 28681 25392 25936 2043 4268 4187 16930

Beacon Block Root:

0xc907f0dc9b4f839e8f2186fa24ecac1411af1266bf2a5d7ad1e2bb6b0f65c920

Source:

Epoch 2094 (0x851e63a8f7aba63e02c3413f1ebe1ee2c07809e81946d98262bf9a0e3fc05f21)

Target:

Epoch 2095 (0xaec33ec58970f235f29c98f1d02c4601981560080e9af4ec91f6ea5198ac9e04)

Signature:

0xac01ffc1ab772f3a2b0c1cdf25c40b6696c7e1eb98fb9e246c709027a19135d7fc683244ec80ab37c30365d99ac6fdd50baa8990aea73572cf99a705b4ed8658fc0544bccde7821d8c5ca78237c38851e8823a1135de8ecb0ad0d58f8eca2aba

Attestation 3

Slot:

67043

Committee Index:

Aggregation Bits:

11111111 11111011 11111111 11111010 11111101 11111111 11111111 1111111
10011111 11111111 11111111 11111011 10111101 11111111 10111111 1111111
111111

Validators:

27874 11948 29883 7764 14660 3351 3558 1777 7936 2028 21607 2892 10728 14838 2709 27099 10877 6110 18354 11907 13485 28755 13909 28398 20669 14935 8168 12045 5241 16928 25677 4385 19433 16243 13343 14984 18012 27135 9713 5688 29683 19401 19350 12987 5796 9208 17848 22290 21073 26308 23404 1382 10093 29090 28182 26847 13701 10632 20803 1421 3745 26293 9370 18197 26462 4944 16036 15041 26103 14553 21450 5662 6789 13745 10149 18259 16537 10252 11844 2092 6503 8280 8323 8268 8030 13351 5807 6734 6792 12669 27438 29977 2379 12627 10330 21494 4791 1991 19466 7003 17286 23651 28316 20613 2261 4335 4344 12575 5855 17441 22879 8155 1458 13677 1876 8569 10943 2106 3361 22721 16161 25280 2416 20360

Beacon Block Root:

0xc907f0dc9b4f839e8f2186fa24ecac1411af1266bf2a5d7ad1e2bb6b0f65c920

Source:

Epoch 2094 (0x851e63a8f7aba63e02c3413f1ebe1ee2c07809e81946d98262bf9a0e3fc05f21)

Target:

Epoch 2095 (0xaec33ec58970f235f29c98f1d02c4601981560080e9af4ec91f6ea5198ac9e04)

Signature:

0x8b1fd71f72ce23ddc2350b1dff2d7d78f4b75658b267e238a798293cbf99fe01bd6ce1fa1950a3913fda879df166fd640740027a5d3eaed37789ee6ccdd9761652ad5c8e8445e05aabccbe03200365b5437d3084d15b400814f3b4905c1603fc

Attestation 4

Slot:

67043

Committee Index:

Aggregation Bits:

11111111 11111111 11110110 11111111 11101111 11011111 10111010 1111111
11111111 11111111 11111101 11111111 11111111 10111111 11111111 1111111
101101

Validators:

9041 18772 1749 20057 16416 18144 8136 26509 16402 9124 27222 7106 9752 21861 1881 25736 4184 20795 14166 10485 14324 22734 10566 25839 11867 9316 19098 5382 19509 16553 13434 23287 5762 19719 8996 3143 5644 26636 28262 12388 12753 23096 27739 16841 3653 23942 18710 5035 25224 27819 26871 26092 28701 3070 17547 9430 27321 22075 5400 29599 17418 15841 19997 17317 18372 11859 11005 27537 1083 25648 5774 9950 12086 20465 1463 6431 5183 16145 25379 4037 29290 4376 19757 22267 8476 1225 7404 25409 27843 11309 3404 11025 25411 29204 8968 29953 25328 15606 8049 11793 10215 27733 8970 9814 3835 3097 28307 12848 7688 7708 3949 25247 14953 12574 22156 9250 20899 6162 18333 3917 10504 4716 2563

Beacon Block Root:

0xc907f0dc9b4f839e8f2186fa24ecac1411af1266bf2a5d7ad1e2bb6b0f65c920

Source:

Epoch 2094 (0x851e63a8f7aba63e02c3413f1ebe1ee2c07809e81946d98262bf9a0e3fc05f21)

Target:

Epoch 2095 (0xaec33ec58970f235f29c98f1d02c4601981560080e9af4ec91f6ea5198ac9e04)

Signature:

0x835727e34b17cfa0a795c66a0db1d35c014d2f464045eeb33b53ea7403a706d8c5baa8d64b745183d01d67ac8aee7b9f16ec649fc4756b68425d46375acb6eda46f6bfa373f3851915ef089250e19a377a92bf5468ac840cb9d9353294d1e90e

Attestation 5

Slot:

67043

Committee Index:

Aggregation Bits:

11111111 11111111 11111111 11111110 11001111 11111111 11111111 1111111
11111111 01111111 10111111 11001101 11111111 00011111 11101111 1111111
111111

Validators:

2750 23604 10388 2758 15791 23580 7687 17076 19737 5224 23189 11586 22167 15124 17984 18234 8808 2844 16360 22310 22263 1980 28472 12083 26151 27243 12482 21121 3043 11615 15340 16817 2045 16862 26451 29056 12253 18664 20014 27104 16074 17432 10478 9980 22959 26359 18112 16018 27174 4644 3881 14856 1818 1706 11750 19101 21292 23497 17187 11228 7836 7913 10383 8091 15348 25367 28635 22936 15701 26245 26357 13222 18920 13122 1644 21681 26127 27351 22670 17523 21898 18092 8694 8125 13850 17979 23085 12462 10571 19673 26593 6612 26114 27067 13527 13728 16762 12710 9498 18344 20585 17709 20733 27189 18436 3440 29819 14416 12208 15690 19629 23235 5236 10607 17825 19731 20745 19960 10242 26457 14631 7444

Beacon Block Root:

0xc907f0dc9b4f839e8f2186fa24ecac1411af1266bf2a5d7ad1e2bb6b0f65c920

Source:

Epoch 2094 (0x851e63a8f7aba63e02c3413f1ebe1ee2c07809e81946d98262bf9a0e3fc05f21)

Target:

Epoch 2095 (0xaec33ec58970f235f29c98f1d02c4601981560080e9af4ec91f6ea5198ac9e04)

Signature:

0xb2127b3ff1c7e6accd0e6ecc6b24dce6b0980b84e49466a178aaf84c9d19d527e8d66fbe2a51519db2cc5318552756c70212a45cb8414494b2dd957736d4d137b319ee4fbe48005dc092168f056fa7dcb63e6d1f7223004e2baa542faaccac44

Attestation 6

Slot:

67043

Committee Index:

Aggregation Bits:

01111011 11111111 11010111 11011111 11111100 11111111 11111111 1101011
11111101 11101111 11111111 11111110 11111111 11111111 11111111 1111111
111111

Validators:

10402 9778 29582 23367 28375 6440 15846 19920 27430 28003 12791 19524 11081 9350 28991 23969 8829 2795 14415 10380 24006 27652 2456 27053 7353 4903 19160 22967 7004 21076 16286 3412 7307 16783 12166 17732 28722 18120 20991 29137 28751 3101 26184 12500 9344 12799 5300 20715 24040 17266 12112 14202 18693 27247 9643 15578 23016 18338 28127 15901 19688 26983 19582 22235 28852 22289 29357 15242 27060 8157 10395 19726 5731 14647 19223 19915 1259 11685 29610 27185 2633 2044 26512 15045 7859 10630 1044 4196 25537 10003 13733 5070 9043 13155 1910 8623 13538 14591 19035 2220 27746 6215 18906 21368 25263 8587 22358 18268 20985 17274 1554 11763 6547 15374 5869 7066 17011 22975 14576 29783 27990 1323

Beacon Block Root:

0xc907f0dc9b4f839e8f2186fa24ecac1411af1266bf2a5d7ad1e2bb6b0f65c920

Source:

Epoch 2094 (0x851e63a8f7aba63e02c3413f1ebe1ee2c07809e81946d98262bf9a0e3fc05f21)

Target:

Epoch 2095 (0xaec33ec58970f235f29c98f1d02c4601981560080e9af4ec91f6ea5198ac9e04)

Signature:

0x86568138ab56a87d7df15423b06e65513c543410cef480620fdfc68cfd1188aea500d0be2d4d79ec4272053216603538143966d841aaae31bef8b50d4f48a7641b2f7af8db47da1a45d76cf6982897b97e6b171fca1d3b7ed39c4860a58e73cd

Attestation 7

Slot:

67043

Committee Index:

Aggregation Bits:

00010000 01000010 00100100 10100001 10000100 00000011 00000000 0
00110000 00000000 00100000 00000100 10001001 00000010 00101110 0
00001

Validators:

Beacon Block Root:

0xc907f0dc9b4f839e8f2186fa24ecac1411af1266bf2a5d7ad1e2bb6b0f65c920

Source:

Epoch 2094 (0x851e63a8f7aba63e02c3413f1ebe1ee2c07809e81946d98262bf9a0e3fc05f21)

Target:

Epoch 2095 (0xaec33ec58970f235f29c98f1d02c4601981560080e9af4ec91f6ea5198ac9e04)

Signature:

0x9692abd5aa059fe0e61d793617e47f6d4a447dcac70fc197be999d9655980fc19107f44f30b2a949deb2e3af6348473b15a570a5026cc9aa0bd9822b7e0822244f05704743bc378dfb4997f70ee56a8001ef047fe37d0efa905db9f5f511347d

Attestation 8

Slot:

67043

Committee Index:

Aggregation Bits:

11000000 00001001 00000000 01000000 10000000 00000000 00110001 0
00000001 00000001 10100001 00011000 10010010 10100001 00000000 0
00101

Validators:

Beacon Block Root:

0xc907f0dc9b4f839e8f2186fa24ecac1411af1266bf2a5d7ad1e2bb6b0f65c920

Source:

Epoch 2094 (0x851e63a8f7aba63e02c3413f1ebe1ee2c07809e81946d98262bf9a0e3fc05f21)

Target:

Epoch 2095 (0xaec33ec58970f235f29c98f1d02c4601981560080e9af4ec91f6ea5198ac9e04)

Signature:

0xa3da33a63f7a55b45a4ac0da671632c71bda8167925f770a3f4bea999d1032b4abef29d9e80c8715cc33b66212fd9033011b6073cab2dd865bc67cf6dab6bb22b3bec7d8153ed03c015d11f989f542064f11aa8fff6937fa06b37bcb57e34c69

Attestation 9

Slot:

67043

Committee Index:

Aggregation Bits:

10001000 00000010 00000101 10100000 00000101 00000000 00000000 001
00000000 01010001 00000000 00010000 00000000 00000001 00000000 0
0

Validators:

27874 14660 14838 13485 13909 28398 14935 13343 14984 28182 13701 15041 14553 13745 13351 28316 13677

Beacon Block Root:

0xc907f0dc9b4f839e8f2186fa24ecac1411af1266bf2a5d7ad1e2bb6b0f65c920

Source:

Epoch 2094 (0x851e63a8f7aba63e02c3413f1ebe1ee2c07809e81946d98262bf9a0e3fc05f21)

Target:

Epoch 2095 (0xaec33ec58970f235f29c98f1d02c4601981560080e9af4ec91f6ea5198ac9e04)

Signature:

0xb2edcac908e556ada2240d70381792624b5db60df69b32138f80d3acbe9e84da3de12db6f58ed817d12c300b2b160657019490e0fb2ee0afdd8f36d132a7bbb6f1ade276ed58549aab65a984526d8831a1509af088bfb0b7862b6e2df189d768

Attestation 10

Slot:

67043

Committee Index:

Aggregation Bits:

00000000 00000100 00000000 00000010 00000000 11001000 00010001 0
01000000 00000000 00100011 00000000 00000100 00000010 01100010 0
0

Validators:

29016 28338 23887 24063 23866 28355 23544 23589 27923 29063 28853 28099 28407 29183 23143 29418 28681

Beacon Block Root:

0xc907f0dc9b4f839e8f2186fa24ecac1411af1266bf2a5d7ad1e2bb6b0f65c920

Source:

Epoch 2094 (0x851e63a8f7aba63e02c3413f1ebe1ee2c07809e81946d98262bf9a0e3fc05f21)

Target:

Epoch 2095 (0xaec33ec58970f235f29c98f1d02c4601981560080e9af4ec91f6ea5198ac9e04)

Signature:

0xb3de7f2bd31ab4a5cf875eaa9593fdf6187b5f7fd97ad91106c06d76dd0e2d6ff3575095180033fe6acb3d8202d63a4213a5112900d5396918bcea370ff834fadc61c3709a21b11b4a7038221c13f8525525fc87ff96e620d7981dd582a4734c

Attestation 11

Slot:

67043

Committee Index:

Aggregation Bits:

00001000 00000000 01000010 10000000 00000000 00000000 00000001 0
10000000 00000010 00001000 00000010 00000010 00001100 00000000 0
001

Validators:

23367 23969 14415 24006 24040 14202 15578 15242 14647 15045 13733 13538 14591 15374 14576

Beacon Block Root:

0xc907f0dc9b4f839e8f2186fa24ecac1411af1266bf2a5d7ad1e2bb6b0f65c920

Source:

Epoch 2094 (0x851e63a8f7aba63e02c3413f1ebe1ee2c07809e81946d98262bf9a0e3fc05f21)

Target:

Epoch 2095 (0xaec33ec58970f235f29c98f1d02c4601981560080e9af4ec91f6ea5198ac9e04)

Signature:

0x83bdd13ba0e2cb248d0f81d979afb00080f3acb03a7163134504183067b49f3ea05c6d38a73bb4644af19f5d32b88eec0fe7bfe12b84159373a8aae1a1fdb8dc730dbcbd496260bcc5176c6858cab033595a505d2f5f3c3a24fbe66de1b54e63

Attestation 12

Slot:

67043

Committee Index:

Aggregation Bits:

00000000 00000100 00000000 00000010 00000000 00000000 00000010 0
00010000 00010000 00000000 01000000 00000011 00000000 00000001 0
00001

Validators:

15124 15340 14856 15348 13222 13850 13527 13728 14416 15690 14631

Beacon Block Root:

0xc907f0dc9b4f839e8f2186fa24ecac1411af1266bf2a5d7ad1e2bb6b0f65c920

Source:

Epoch 2094 (0x851e63a8f7aba63e02c3413f1ebe1ee2c07809e81946d98262bf9a0e3fc05f21)

Target:

Epoch 2095 (0xaec33ec58970f235f29c98f1d02c4601981560080e9af4ec91f6ea5198ac9e04)

Signature:

0xa04ddda4ceff59cac681edb20b5f637be82dbfc0849ab7d864372f81f29ff7a39954a7aca6b4349876ed59c52e2a7fd517560598ba9244f9d037c027658987d851578d1286315fad11b7a57f2f6f055963dcd4a1e8bb8ced10cd4da16bc4a64f

Attestation 13

Slot:

67043

Committee Index:

Aggregation Bits:

00000000 00000000 01000000 00000000 00000000 00000000 00000000 0
00000000 00000000 10000000 00000000 00000000 00000000 00000000 0
0

Validators:

20795 20465 20899

Beacon Block Root:

0xc907f0dc9b4f839e8f2186fa24ecac1411af1266bf2a5d7ad1e2bb6b0f65c920

Source:

Epoch 2094 (0x851e63a8f7aba63e02c3413f1ebe1ee2c07809e81946d98262bf9a0e3fc05f21)

Target:

Epoch 2095 (0xaec33ec58970f235f29c98f1d02c4601981560080e9af4ec91f6ea5198ac9e04)

Signature:

0xa4125b03bc0797aa3aebaf020abe885d029b7f7b04db707173d768be8bfc749c6498b3c87e26a191796aa2a332517e0a07331e6dd0f0ca435bc037d217e1bfbb20cc0357e30ae59820388c5ac49a646d19f1cfc380d380b2e77520591f1573ef