Block at Slot 143675

Epoch:

4,489

Slot:

143,675

Status:

Proposed

Time:

2025-02-05 18:05:00 +0000 UTC ()

Proposer:

metanull-node1

Block Root:

0xe69111b1f9147a9408534491378a64767aec54114918a53eaf4888a6b56d5276

Parent Root:

0x0a931c45046794517316d677370795d601116659dc3ac71abf0d1967ad257246

State Root:

0xedcdd2f008937a74faf0c110dcfa048d4afb416645740afdc3a1a102ff830ebc

Signature:

0xace19759d1097f602fd9fa8670bc3e0dd54544432a613e0c21124f581e688b561c61aa66112cdb193190e2c2e719d5710e6e512c911af5e33fe8cbc1c371f7860fb38a43d5009200eea02ef9cc74f8fa062d9d7dcbc454639c81c5690e54a3c3

Randao Reveal:

0xb32c89ce83026bbc5e5e9a5302ef680774d136dbf86c46b68b851fe23c09090f9927b6436a459e737c0b018c7cde760b0ed363309781a2ec94da2cfff0b13377a7ffd66f0d277867c5d27376f1c11462c3760bc2d96723b67106310baa9b9ca9

Graffiti:

0x4255313431654c53633236630000000000000000000000000000000000000000

Hex UTF-8

Eth 1 Data:

Block Hash:

0xbc747a3dbf987f382b63ec55b213974b6f448900e2f3862fb0ae875894792f35

Deposit Count:

Deposit Root:

0x353c7ac825c743d7f6a10deab9145b5874bb6bc681c452acfdca16d9756833a2

Sync Aggregate:

Participation:

96.09 %

Bits:

11111111 11111111 01111111 11111111 11111111 11110111 11111111 11111101
11111111 11111111 01111111 11111111 11111111 10111111 11111111 11111111
11111111 11111110 11111111 11111111 11111111 11111111 11110111 11111111
11111111 11111111 11111111 11111111 11111011 11101111 11111111 11111101
01111111 10111111 11111111 11111111 11111111 11111111 10111111 11111111
11111101 11111111 11111111 11111111 11011111 11111111 11111111 11111110
11111111 11111101 11011111 11111111 11111111 11111111 11111111 11111111
11111111 11111111 11111101 11111111 11111111 11111110 11111111 11111111

Signature:

0xb1f4452375e9529f29ea644896c7578b09a15f6dc7c8327b7c288e6c0b15b0f4964d9aad935130c6aeba4d04c0f2a83009fc6f4c4d334a1f633c9755308a104f66a4858fb54fde51dfb9a1736f16a5cead5511dccc5b4451635902c936f6f7d9

Execution Payload:

Parent Hash:

0xf274bf66c05f6098639bf31323a60630ae01920873329c2e3ad0558b043d1b40

Fee recipient:

State Root:

0xf9403e47062cb6330aef3b19491b84ee472d5d4363d363ec2cb0fc6b348834ac

Receipt Root:

Logs Bloom:

0x00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000

Block Randomness

Block Number:

137521

Gas Limit:

30000000

Gas Used:

Timestamp:

1738778700

2025-02-05 18:05:00 +0000 UTC ()

Block Extra Data

Base fee per gas:

Block Hash:

0x76ad3364281f7503741112a36273861137fdc4fc97de6696f22e6d21dce516f7

Transactions:

Attestations:

Votes:

963

Voting Validators:

963

Voluntary Exits:

Slashings:

0 attester & 0 proposer slashings

Deposits:

Showing 14 Attestations

Attestation 0

Slot:

143674

Committee Index:

Aggregation Bits:

11111111 11111111 11111111 01111111 11011111 11111111 11111111 1111111
11111101 11111111 11111111 11111111 11111111 11111111 11111111 1111111
11111111 111111

Validators:

10533 29100 1371 20549 29760 6221 31451 5266 16943 15726 17130 12496 12556 5837 31620 12854 15451 27880 28827 8092 3747 29180 9427 20527 29302 24974 12296 24658 19779 6129 28959 12321 4543 19652 16273 17702 8814 10770 11161 10221 5796 12362 26024 22473 24477 10893 8735 16381 7440 6287 17251 23599 30177 24330 7320 17481 26018 13334 13222 27982 13767 2283 6271 17950 22448 19149 8476 9234 8281 11191 2661 25043 3090 12999 9211 13709 27272 24001 13139 13736 10233 29397 8691 18313 11105 16849 8076 10755 11492 2390 16609 10240 25499 8376 19445 24285 3250 19083 16307 19147 22014 21793 23287 30074 9071 17732 31158 27438 23056 23429 19002 19675 8631 13976 7698 29883 10964 12495 18447 26639 26116 18567 16029 20287 11974 25130 22670 30980 28521 28238 9651 4351 3949 2611 9524 20606 24177 18380 2987

Beacon Block Root:

0x0a931c45046794517316d677370795d601116659dc3ac71abf0d1967ad257246

Source:

Epoch 4488 (0x1bfed7f93a634ff8ed6da57028f9fcf56ed326c0066812eeb1eff058bb80ce51)

Target:

Epoch 4489 (0x146c24170702c62a0e73b1b4803839a4a5cf7c650f0229f48cdce32bac6b6616)

Signature:

0x950663ae1303a957b20e501528c672c41b9cbfb6382b3148d6bdba5faa2914e555550fe3c00c2459200cca3b532cb73e0756817e279b4032ab0664d98f6dc74ca463b267789025473f3141e51e5308c2301c0b6505bf24498c461f2bc8184f23

Attestation 1

Slot:

143674

Committee Index:

Aggregation Bits:

11111111 11111011 11111111 11101111 11111111 11111111 11111111 0111111
11111111 11111111 11111111 11111111 11111111 11111111 11111111 1111111
11111111 11111

Validators:

22842 1188 30587 16331 27227 24697 13371 30034 4413 9804 23566 3782 7848 7800 2947 20937 13289 1592 27597 8341 30138 27182 11850 31086 1647 28053 10891 9709 6321 11444 2804 12938 12779 9224 23033 13421 20679 25880 19972 22973 11562 1533 20057 22090 11170 13608 27865 11743 30854 25121 10693 17854 6637 16986 16702 31528 22152 25162 2022 24622 7340 18923 7288 29805 11171 21426 7359 16065 24060 23802 25649 26272 28464 4210 22694 21454 25781 20308 22424 17175 30795 16333 21758 14595 24978 9471 18898 10647 24881 23432 11197 30408 24816 6648 13110 17421 9810 28873 9733 6303 12993 26716 20615 14424 14381 25417 2437 24376 5135 12718 9287 21967 27448 2465 29809 23772 31342 16867 15316 6863 27530 10288 2289 27822 22690 4845 15334 7062 3687 17463 3199 17723 11541 10426 24260 20457 24738 9268

Beacon Block Root:

0x0a931c45046794517316d677370795d601116659dc3ac71abf0d1967ad257246

Source:

Epoch 4488 (0x1bfed7f93a634ff8ed6da57028f9fcf56ed326c0066812eeb1eff058bb80ce51)

Target:

Epoch 4489 (0x146c24170702c62a0e73b1b4803839a4a5cf7c650f0229f48cdce32bac6b6616)

Signature:

0x913ce31b9664ef86716e72b7a02c8d83e066ecaf8c5e0b0042fee7833d5ede0b235fd6786fe2fcec1b5e6844ce960fb019b8791493697d87a9acb69174c8f7b5e6b19c4fd8148936970df6f2b09beb113f63f3ba60caf74832092b8f5d300369

Attestation 2

Slot:

143674

Committee Index:

Aggregation Bits:

11111110 11111111 01111111 11110101 11111111 11111111 11111111 1111111
11111111 11111111 11111111 11111111 11111111 11111111 11111111 1111111
11111111 11111

Validators:

15171 9685 2444 3662 30058 7254 3682 5782 8928 1924 17249 23357 11892 16406 13408 24868 31004 16829 7450 27545 9479 2037 19874 24219 16768 30647 29921 27357 7215 5429 23336 7222 10136 3562 1481 3716 7066 25503 12700 30884 18975 14342 21211 9348 6260 25922 21139 24873 19127 1899 2112 17482 1685 12594 17592 8733 12266 8666 26362 29270 31263 21742 29386 13478 15728 30105 3228 17750 7810 7839 19119 11477 23814 13076 18115 21474 23295 24957 9775 12387 23646 22077 1610 14201 14361 26525 14389 15014 17711 4451 24559 11580 12025 1018 4832 12737 16153 17507 24326 23935 30440 16780 14510 21175 24888 20352 30803 16827 27141 22181 21858 9415 7706 28227 22628 10938 6900 8565 5124 25571 29411 17425 14635 20696 16184 6432 30243 24821 31601 19584 25588 5268 24955 26178 20983 30529 16685

Beacon Block Root:

0x0a931c45046794517316d677370795d601116659dc3ac71abf0d1967ad257246

Source:

Epoch 4488 (0x1bfed7f93a634ff8ed6da57028f9fcf56ed326c0066812eeb1eff058bb80ce51)

Target:

Epoch 4489 (0x146c24170702c62a0e73b1b4803839a4a5cf7c650f0229f48cdce32bac6b6616)

Signature:

0x861e7074c3c13028f35344be860d0f75aba4a11e0789f238b21bc08ec698f2bfa0ed5ad404c4835316bcc8455d10940d037fd94b5b8e3b0bc5a73f4d2360b8c9e0fc107eaca9ddf6da6403f1250cb4df74761f7fd02761da27a40aa07cd1734e

Attestation 3

Slot:

143674

Committee Index:

Aggregation Bits:

11111111 11111111 11111111 01111111 11111111 11110111 11111111 1111111
11111111 11111101 11110111 11111111 11111111 11111111 11111111 1111111
11011111 111111

Validators:

1154 22513 6926 28430 15738 30746 21430 14553 8449 10840 30705 16634 23611 11805 21380 15072 1486 22246 11305 30825 24413 10758 25539 13742 28515 6818 19274 22318 21008 11432 26688 11629 18373 7145 17230 28425 30450 26328 16411 1291 10989 12735 28633 28936 28228 19001 11895 29821 13434 23416 22731 18539 22503 25427 23419 26490 17198 26053 8661 14688 6422 25663 29077 23306 4398 3224 19879 5342 27128 2535 9697 16556 2764 10577 12242 5532 15514 27753 22360 12616 1990 17036 21781 29899 6949 19255 30577 8984 31388 3858 3526 5872 18064 20956 6256 10125 14472 29061 5376 1044 6669 1785 20873 3439 17310 3572 10807 7491 22309 31370 9789 5166 18781 14098 24823 2208 19031 10846 1292 22794 12292 3561 27994 14065 20366 30727 21668 20958 22978 23012 10152 25361 13068 7237 4588 1593 19568

Beacon Block Root:

0x0a931c45046794517316d677370795d601116659dc3ac71abf0d1967ad257246

Source:

Epoch 4488 (0x1bfed7f93a634ff8ed6da57028f9fcf56ed326c0066812eeb1eff058bb80ce51)

Target:

Epoch 4489 (0x146c24170702c62a0e73b1b4803839a4a5cf7c650f0229f48cdce32bac6b6616)

Signature:

0xb10299a5e94b2bdf3af677aac5ae3b61c906de621e87edf2f7905479e9a92f1a769ec7d255bf05766f60e4ca720363a00b448a1ed36865d22fd382e591ea2cb7abced9293b4b68d8877af991b54e802af8edfb1e7ae629f132f875c75384e580

Attestation 4

Slot:

143674

Committee Index:

Aggregation Bits:

10111111 11111111 01111111 11111111 11111111 11111011 11111111 1111111
10111111 11111111 11111111 11111011 01101111 11111111 11111111 1111111
11111111 111111

Validators:

3891 18477 1560 4909 12663 3867 15804 30975 27758 30391 29464 3053 23876 30761 7522 2974 14750 11468 13651 19327 3964 20616 7789 17108 3636 23991 5906 17900 21234 14819 19091 4779 26244 27813 16891 26004 16210 7485 10258 5167 14131 27297 26803 9913 26993 28437 26592 4106 13142 6553 19585 15347 17878 12687 4239 24751 10551 29266 13335 3802 25049 15333 31053 16197 24680 10789 15146 24619 2203 3529 14751 10559 21926 6917 17407 25902 31184 27235 12942 17934 13653 17857 17866 20349 23741 1004 11192 23497 22931 8091 13349 14987 14253 22995 12373 27361 11622 3921 1031 2994 31089 29173 19963 17834 14014 26284 5127 18048 4977 15116 23308 19764 9245 25804 27767 2318 11147 16631 17858 23904 5032 14036 27938 27638 19313 19009 14325 16111 17512 1703 7100 25501 30470 8260 13072

Beacon Block Root:

0x0a931c45046794517316d677370795d601116659dc3ac71abf0d1967ad257246

Source:

Epoch 4488 (0x1bfed7f93a634ff8ed6da57028f9fcf56ed326c0066812eeb1eff058bb80ce51)

Target:

Epoch 4489 (0x146c24170702c62a0e73b1b4803839a4a5cf7c650f0229f48cdce32bac6b6616)

Signature:

0x8e1782632a3c82c2a61ffa7ee009a5ac4351046942dd8beb06eafd87adaefc6c1e96f136b74f09263b5ced33a2f5c8ac16acd94a6bc4d085c05cab3262d1353696cde3335365bbaef7090544f6bc3316cdbd6169b440c56403ccd0408745c8a3

Attestation 5

Slot:

143674

Committee Index:

Aggregation Bits:

11111111 11111111 11111111 10111111 11111111 11111111 11101111 1101111
11111111 11111011 11101111 11111111 11111111 11101111 11111111 1111011
11111111 11111

Validators:

29116 12384 23606 15283 5262 30542 25500 18099 24991 21857 28971 11540 14063 14899 29239 4213 24655 11811 21147 25390 5549 17191 29659 9212 31669 16978 11565 9969 2493 13735 21439 16147 7943 16517 11744 23398 18521 8917 6027 2988 20787 27920 4146 10719 27359 13867 15020 16294 28290 1624 12575 7545 13432 25946 17946 10301 20381 22002 6983 22967 29825 31307 10440 1672 14069 31362 27042 10112 27677 9418 23583 6192 31447 2293 23601 19281 31550 9777 15989 25234 10978 2887 25581 12389 17087 25564 3837 30462 5990 13553 8434 21884 6580 20880 28567 8346 21256 7150 15608 22814 1645 13322 22566 17585 7904 12009 17693 18570 11835 6074 5774 4998 30719 28877 24105 2541 10599 9600 27890 18593 20538 28378 19212 22389 9196 17913 11002 14349 23071 27010 8359 5887 10230 22803

Beacon Block Root:

0x0a931c45046794517316d677370795d601116659dc3ac71abf0d1967ad257246

Source:

Epoch 4488 (0x1bfed7f93a634ff8ed6da57028f9fcf56ed326c0066812eeb1eff058bb80ce51)

Target:

Epoch 4489 (0x146c24170702c62a0e73b1b4803839a4a5cf7c650f0229f48cdce32bac6b6616)

Signature:

0x939c36e0d0491258a421af86c3ce8df994def85e437823dadae883c6791eb77e08e3ccab65cea1a8473ad588bc225f1c0be5d03cbd15cf8b13643fa857c2b0ad77e70107f58738444aaf3bbc1c2a8f4bedf2f731fc7265a80724aebce626c440

Attestation 6

Slot:

143674

Committee Index:

Aggregation Bits:

11111111 11111111 10111101 11111111 11111111 11111111 11111110 0111111
11111111 10110111 11111111 11111111 11111111 11110111 11111101 1100111
11111111 111111

Validators:

5289 16688 7722 20393 12862 29828 16353 28408 10849 16138 23770 9337 21971 5149 12786 29520 28450 17559 26894 1981 15544 9457 26384 20371 19095 25057 16007 19600 23136 30226 1811 7774 8771 29947 11214 20976 21067 23667 1779 8179 6458 8823 2601 16343 25952 13263 13252 21787 1548 22465 9056 19415 14153 8524 23937 21495 2120 29552 15401 16744 30781 14230 17932 22877 8891 4660 9017 27734 27847 10367 24026 5193 9548 28506 9460 22544 24840 20933 23828 19006 10926 16286 17982 10709 8541 3306 8199 25019 9670 28303 24408 7540 14523 11962 15339 8880 24804 12382 5372 9991 21851 29377 5248 31653 3174 11889 24135 10284 11908 26681 13156 18381 20221 1075 28405 5207 21470 10998 23263 18265 26506 1333 13277 10684 1804 6355 2016 22615 8989 10234 31394 17261

Beacon Block Root:

0x0a931c45046794517316d677370795d601116659dc3ac71abf0d1967ad257246

Source:

Epoch 4488 (0x1bfed7f93a634ff8ed6da57028f9fcf56ed326c0066812eeb1eff058bb80ce51)

Target:

Epoch 4489 (0x146c24170702c62a0e73b1b4803839a4a5cf7c650f0229f48cdce32bac6b6616)

Signature:

0x857761184fa952b48fe507a1d230f243c1140e0991584139c9752f4b1ddfd22811a9e1f0bbb941b4d5d2783bd5dcd14b06d8e4405d7c2f35525c497e91dd55c87dc710b24b7b258d037850a41e05a29d84a98f3d9b4a8868b4d22bfd6748bfb4

Attestation 7

Slot:

143674

Committee Index:

Aggregation Bits:

01000110 01000001 00000100 00011001 00010000 00000100 00000000 000001
01000000 00000000 00100001 00000100 10101010 00010000 01000000 0
00000000 0

Validators:

Beacon Block Root:

0x0a931c45046794517316d677370795d601116659dc3ac71abf0d1967ad257246

Source:

Epoch 4488 (0x1bfed7f93a634ff8ed6da57028f9fcf56ed326c0066812eeb1eff058bb80ce51)

Target:

Epoch 4489 (0x146c24170702c62a0e73b1b4803839a4a5cf7c650f0229f48cdce32bac6b6616)

Signature:

0xa4fb4fd0a37e7e6e1e242df8a94b1ba8262883e3e8cb588f79a87724818193e075cdf73716635c5cfc6d9caf4fcbb56719a7402cd56c5335f7cb1098557432ce11c571573c41046531b3a70a25aecc7d7117ab823e03b0c543f188b99051b2bd

Attestation 8

Slot:

143674

Committee Index:

Aggregation Bits:

00000000 00000000 01100000 01010000 00000000 00010010 00110000 0
11000000 00000001 01000100 00000010 00000010 00011010 00100000 0
00010000 1

Validators:

Beacon Block Root:

0x0a931c45046794517316d677370795d601116659dc3ac71abf0d1967ad257246

Source:

Epoch 4488 (0x1bfed7f93a634ff8ed6da57028f9fcf56ed326c0066812eeb1eff058bb80ce51)

Target:

Epoch 4489 (0x146c24170702c62a0e73b1b4803839a4a5cf7c650f0229f48cdce32bac6b6616)

Signature:

0x8f1cf19592522b05ca5c99f0dea02763155b9506db9642af8ac1d5b0c272129dd218380f2aa46b2a2f6108de50513c0e089d1c7f06b9020c9cfee3cd9ea11da0d8bab678b77ceabb8ae1141f3b3f6a42baa97a2aeb89ded62c5520e3c6704423

Attestation 9

Slot:

143674

Committee Index:

Aggregation Bits:

00010100 00000000 00000000 10000000 00000000 00000000 00100000 001
00000010 00000000 00011011 00010001 00000000 00110010 00000001 0
01000000 0101

Validators:

Beacon Block Root:

0x0a931c45046794517316d677370795d601116659dc3ac71abf0d1967ad257246

Source:

Epoch 4488 (0x1bfed7f93a634ff8ed6da57028f9fcf56ed326c0066812eeb1eff058bb80ce51)

Target:

Epoch 4489 (0x146c24170702c62a0e73b1b4803839a4a5cf7c650f0229f48cdce32bac6b6616)

Signature:

0xa8f17af6e039606d6e8506e2476559bc26cbe8f332abb5dd842fcfe9202875b3bcf653e4c91ac88564d5b6b4ee573f45144d876e011b04c294d8e73b843007321a7c0d107a23d89ebfbf0204d51f26d67e5a6a87162219e9511d8b2d4b681afb

Attestation 10

Slot:

143674

Committee Index:

Aggregation Bits:

00000001 00000000 00100000 00000001 00000010 00000000 00000010 0
10010010 00100000 00000000 00000000 01100000 00000000 00001000 0
00000110 0

Validators:

15804 14750 14819 16210 15347 15333 16197 15146 14751 14987 14253 15116 16631 14325 16111

Beacon Block Root:

0x0a931c45046794517316d677370795d601116659dc3ac71abf0d1967ad257246

Source:

Epoch 4488 (0x1bfed7f93a634ff8ed6da57028f9fcf56ed326c0066812eeb1eff058bb80ce51)

Target:

Epoch 4489 (0x146c24170702c62a0e73b1b4803839a4a5cf7c650f0229f48cdce32bac6b6616)

Signature:

0xa8be6da7e4fedd2f8afab396ca497e309ae995041b684cd0eda1cb0c29dab11b70bea6d4955d21f5c6ea91864c448e490e34d2632ce41fc127e07dfc422be144d24bcb03b58c9ec958c0f16866e0ec7ef525e725a3b7c128575dad3e0027eda9

Attestation 11

Slot:

143674

Committee Index:

Aggregation Bits:

00000000 01000000 10000000 00101000 00001000 00000010 01000001 0
00000000 00100000 00000000 00000100 00100100 00000000 00000000 0
00000000 0001

Validators:

15726 15451 24974 24658 16273 24477 16381 24330 25043 16609 24285 16307 16029 24177

Beacon Block Root:

0x0a931c45046794517316d677370795d601116659dc3ac71abf0d1967ad257246

Source:

Epoch 4488 (0x1bfed7f93a634ff8ed6da57028f9fcf56ed326c0066812eeb1eff058bb80ce51)

Target:

Epoch 4489 (0x146c24170702c62a0e73b1b4803839a4a5cf7c650f0229f48cdce32bac6b6616)

Signature:

0xaab1ddcfee7adfd469d2dd951d4d3013d08b282b2faa83312ca4e32c03004be76c6f16cec52e83bde88e1ced19dd9ee01130e90b6fcaab75b25b45740fd95f00ee583e9eba0b63d5810abe257e26eee3fddc0c2b82ddb2a2e7f1785c1fef7fac

Attestation 12

Slot:

143674

Committee Index:

Aggregation Bits:

10010000 00100110 00000000 00000000 10100000 00000001 10000000 0
00000000 00000000 00100000 00000000 00000001 00000000 00000001 0
00000010 0

Validators:

29116 15283 28971 14899 29239 16147 16517 15020 16294 15989 15608 28877 14349

Beacon Block Root:

0x0a931c45046794517316d677370795d601116659dc3ac71abf0d1967ad257246

Source:

Epoch 4488 (0x1bfed7f93a634ff8ed6da57028f9fcf56ed326c0066812eeb1eff058bb80ce51)

Target:

Epoch 4489 (0x146c24170702c62a0e73b1b4803839a4a5cf7c650f0229f48cdce32bac6b6616)

Signature:

0x89335a5ac18f7caec5946f70b2a918c77323910bb9125bdb9bbcb6202fadea38590d76eca09afe1776a564cd925e4327069571451d1a9d54207937d0b68cc75fe4a7ec13f8608a3bc54550c5125f0930e0e391898a4ce8b8a602d7ac1e46e3db

Attestation 13

Slot:

143674

Committee Index:

Aggregation Bits:

00000010 00000010 00000000 00000000 00000000 00000000 00000000 0
00000000 00000000 00000010 00000000 00000000 00000000 00000000 0
00010000 0

Validators:

21430 21380 21781 21668

Beacon Block Root:

0x0a931c45046794517316d677370795d601116659dc3ac71abf0d1967ad257246

Source:

Epoch 4488 (0x1bfed7f93a634ff8ed6da57028f9fcf56ed326c0066812eeb1eff058bb80ce51)

Target:

Epoch 4489 (0x146c24170702c62a0e73b1b4803839a4a5cf7c650f0229f48cdce32bac6b6616)

Signature:

0xb5978fa631674cf7e3b731f3bb5cb400ea650384cdba2bc4f0a13ff2ba46c7de6f1cbee7b464bb69670ef5d1da6327990a41a05383c5200ad9fc822aa27ede257c44c3b211931ec0fbf8dba1bb85550a0a745c40ae39f7c829a9693831e13ffa