Block at Slot 162066

Epoch:

5,064

Slot:

162,066

Status:

Proposed

Time:

2025-01-11 07:23:12 +0000 UTC ()

Proposer:

metanull-node1

Block Root:

0x3f16061bc4a40758e73025809e16463439a0181636c4ec91dfe0513076b20bd9

Parent Root:

0x432ddd1335026f1e3d92356af39a8043bff6cc0dd550fea45fdfd18b509eeacd

State Root:

0xa3a50f418a1812944ea3d002469a7f2dfcd41042d5de4c5f59a436f66104964a

Signature:

0xb76040dedcab1229a8a65c759ce871477967a6850358f75af20c067faa8236d13917c8acc8ddf6ddf1fd4d041054748204ef9beeb3190d07a10506194446332c12e1a530b17171ee0d8bf30b4a59457b19adf52e835001048769470ed5ab5fb4

Randao Reveal:

0xa14052430cd2981a091773cf0ed60297b1eb049f1781555281d37ffb21eb7d6f1b814f23c31b0ef9f860e9074f33c53d08184be13438fd1320bdd42615079cb4e2839032654f7f42dda6be4aa64c2fbaf9dd829dc06c4dbd3dcd4cd4b1aba5d2

Graffiti:

0x4255313431654c53633236630000000000000000000000000000000000000000

Hex UTF-8

Eth 1 Data:

Block Hash:

0xffaad1d8d67e7b4f4cc3b350b063da76c66ed331c55716768c4b9b0c30d5086e

Deposit Count:

3,002

Deposit Root:

0x08c9248b85842304ca5bf554909ab96a72a04a2ebb99355dbd479df2cc2622fc

Sync Aggregate:

Participation:

94.34 %

Bits:

11111111 11111111 11110111 11111111 11111111 11111111 11111011 11111111
11111111 11111111 11111111 11111111 11111111 11111111 11111111 01111111
11111111 11111011 11111111 11111111 11111111 11111111 11111111 11111111
11111111 11111111 11111111 11111111 11111111 01111111 11111111 11111111
11110111 01111111 11111111 11111110 11110111 11111111 11101111 01110111
10111111 11111111 11111111 11101111 11111111 10101111 11011111 11111111
11111111 11011111 11111111 11110111 11111011 11111111 11110110 11111111
10111111 11111111 10111111 11111101 10101111 10111111 11111111 11110111

Signature:

0x8c0ddeffe072e648f1c57cc1118bc9991f404cbd45bbfb62c6a7a9f171fe20444032644f420e085facb74bb04c4e534a16efd9781c6cfc5b7502c805870f345c00e7d1ecf9ac433d427b8a2855777afd6b372b131eaa41d77e3bfd56b980c5f4

Execution Payload:

Parent Hash:

0xd8cc48014544e91ba91a011aeef672cd728740621d9fd964122293cae8b17371

Fee recipient:

State Root:

0x52dc88a6a67e1e69ec9545abd0cc2b2f3bf0421c31b0d4fd7bb6d05a9f74830a

Receipt Root:

Logs Bloom:

0x00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000

Block Randomness

Block Number:

150759

Gas Limit:

30000000

Gas Used:

Timestamp:

1736580192

2025-01-11 07:23:12 +0000 UTC ()

Block Extra Data

Base fee per gas:

Block Hash:

0x1cc888f910a88e8ad7373a6c15b0279d8dcb90b3799921c2df79e10090405dc8

Transactions:

Attestations:

Votes:

896

Voting Validators:

896

Voluntary Exits:

Slashings:

0 attester & 0 proposer slashings

Deposits:

Showing 14 Attestations

Attestation 0

Slot:

162065

Committee Index:

Aggregation Bits:

11111111 11111111 11111111 11110111 01111111 11111111 11111111 1111111
11111111 11011111 11111111 10111111 11111111 11111111 11111111 1111111
11111111 1

Validators:

4189 7245 8103 16625 7183 7399 21870 9124 30667 13564 3467 9936 14344 13360 9104 8555 17481 20674 5836 1094 18204 18490 12263 1938 13493 18647 19492 18480 6050 27374 28273 10207 22173 27893 14339 7856 22807 11753 21478 18796 27641 17986 1880 20072 1183 7407 6343 24016 14349 16073 1910 30403 27556 3965 11820 11270 6623 3264 3185 3679 9468 21187 2266 27023 6259 15960 20478 1422 13168 20518 19267 5101 19215 4694 6609 26953 30678 23928 22939 12837 11940 18826 13193 14411 18766 3297 22048 13087 2649 11817 17410 17961 19710 1594 1989 11953 18370 5967 30399 26959 26773 1160 16181 9935 17294 15273 2392 18210 22125 13399 23562 11867 13246 29060 3170 6536 10745 8730 23225 18684 21580 11573 7256 6971 10622 28234 23162 14916 12006 10290 6255 11250 9313

Beacon Block Root:

0x432ddd1335026f1e3d92356af39a8043bff6cc0dd550fea45fdfd18b509eeacd

Source:

Epoch 5063 (0x27efe9b0c9532096ceec5e9b348c1ed45f769fe51c0afd967addf406ce009ac7)

Target:

Epoch 5064 (0xacdafe6e3dd13b1f2e341f98de048ee3470cf23b753defefa97c7c09f42cf5a1)

Signature:

0xacdbf99f189fcd20f90a58119af5efa14ae3ee04e1213e8a36445cae2ead751b278f2d5efccee8b74cf0a852e45ad6c0120db6500c011ef436c640d863e08ac874cc90f84f895d1e68677f7e8cee53dfb028d603085af5743fa1d97f30a61edf

Attestation 1

Slot:

162065

Committee Index:

Aggregation Bits:

11111111 11111111 11111111 11111111 10111111 11111111 11111111 1111011
11111011 11111111 11111111 11111111 11111111 11111101 11111111 111101
11111111 1

Validators:

30246 7315 27078 28034 4380 27699 9139 17192 2002 17919 30499 12769 3802 26134 17521 6759 4238 6018 17023 20259 12254 5879 1599 20541 2397 18430 28222 23540 3005 18249 14484 23288 21847 22777 13551 3258 17671 9472 26907 13109 5094 13159 20186 29043 26329 8354 12247 28694 15776 12813 20678 8100 7733 30195 23358 13466 30081 12325 28407 19512 5501 30217 16921 17010 6381 9853 19978 8873 15251 7467 19811 2053 28072 3997 18258 20486 20113 22816 29208 26235 8051 21990 21232 17946 27615 12780 27443 17892 23872 4416 3509 26890 2209 9801 23480 4430 19859 20447 27128 15681 27957 27454 4389 1077 29880 17430 12442 23670 10673 14439 19231 6341 2384 6531 22326 26941 4777 11096 29396 15086 22368 29904 8221 25280 4449 12329 16071 21459 8703 11256 5574

Beacon Block Root:

0x432ddd1335026f1e3d92356af39a8043bff6cc0dd550fea45fdfd18b509eeacd

Source:

Epoch 5063 (0x27efe9b0c9532096ceec5e9b348c1ed45f769fe51c0afd967addf406ce009ac7)

Target:

Epoch 5064 (0xacdafe6e3dd13b1f2e341f98de048ee3470cf23b753defefa97c7c09f42cf5a1)

Signature:

0xae9865bff4e66dd0edcfe036a0c6cf23e75672e9134be6cb2e4570489dbc04df8f830bcebc1d6280322657d0f232442e00e96fcb16515675caed02be63af03600f36b7f300637505188d4d47c1d06b883e03cae2fd3df2c6a906b461f3f7463d

Attestation 2

Slot:

162065

Committee Index:

Aggregation Bits:

11111111 11111111 11111010 11111011 11111111 10111111 11111111 111111
11111111 11111110 11111111 11111111 11111111 11111111 11111111 1111111
11110111 0

Validators:

10415 2673 16332 6952 16461 23554 1048 27955 29127 27426 4714 8321 23950 10361 28624 6062 20514 16806 12710 19852 7774 26253 29862 28546 2900 10577 29170 10647 8279 16457 7137 14559 2994 14634 22641 7767 5233 1161 8594 13549 23712 30188 10715 21498 19443 5809 29506 12723 17306 1273 18926 1395 18451 20333 4234 8783 9282 10258 16742 21599 13408 13411 19432 4992 14227 28325 16665 9609 9156 7726 22080 25126 12967 10732 1968 6035 6260 26335 4258 10615 6363 3017 29140 11409 27213 13552 18005 28526 12961 1545 3670 18432 16636 1615 26733 9918 5565 9114 3256 5533 30387 3131 28890 3192 19193 19411 20101 8801 25945 4810 3182 8027 26007 9221 26379 30588 3145 9174 3128 26247 20380 2343 13460 17206 23536 18216 16775 4818 15755

Beacon Block Root:

0x432ddd1335026f1e3d92356af39a8043bff6cc0dd550fea45fdfd18b509eeacd

Source:

Epoch 5063 (0x27efe9b0c9532096ceec5e9b348c1ed45f769fe51c0afd967addf406ce009ac7)

Target:

Epoch 5064 (0xacdafe6e3dd13b1f2e341f98de048ee3470cf23b753defefa97c7c09f42cf5a1)

Signature:

0xb8ead9e376f9d7217fc710be085be1fd04b5d89879fee1d093be918522f8daec785082c0eea6e75c2379e55accf1397f174f28975b4d4b688882f71c72064f926133d7d0cf8c455d77890a654176209f821dd6eebbb33a26a41022e2dd37dda1

Attestation 3

Slot:

162065

Committee Index:

Aggregation Bits:

11110111 11111111 11101111 11111111 11111111 11011111 11111111 1111111
10111101 11111111 11101111 11111111 11011011 11111111 11111111 1111111
11111111 1

Validators:

6101 14766 12055 14535 9725 27737 13389 5620 2055 20303 11806 29289 25980 7056 18630 2282 22099 18458 21516 21901 1972 29334 21975 29768 12223 13970 28202 13282 19300 14702 30111 22688 8339 1067 2907 13297 15343 29970 4385 18471 20981 5911 7625 9371 2656 16990 12920 12152 8218 9529 30660 10209 13052 18828 14371 19174 29455 21733 14718 28282 11486 16965 21933 28038 15699 28175 4195 18277 3893 2640 16693 5014 15299 6044 22465 5030 14715 25131 18302 1482 1179 19464 17853 23002 19000 15270 29071 20194 29689 25221 12205 29167 6737 17072 12461 21593 26483 3511 25847 5288 19486 25647 10119 17674 15166 7462 7671 6419 11704 13840 22325 15508 19673 29190 17947 24025 16027 15188 15867 14614 27689 11664 16949 18759 26912 12902 25666 14764 22281

Beacon Block Root:

0x432ddd1335026f1e3d92356af39a8043bff6cc0dd550fea45fdfd18b509eeacd

Source:

Epoch 5063 (0x27efe9b0c9532096ceec5e9b348c1ed45f769fe51c0afd967addf406ce009ac7)

Target:

Epoch 5064 (0xacdafe6e3dd13b1f2e341f98de048ee3470cf23b753defefa97c7c09f42cf5a1)

Signature:

0xac526d3703722e4faf4676f7a7b6d07f79a9c27de6da94c5c3272cd4f03bb1d52faaa9000f4ca638af481ba421ed824c0a4d49c2bef10c3f0245924b5df40d8bd38a4d91a493655da26f52962844993959bbba8763b8829aed3846867e1e7a33

Attestation 4

Slot:

162065

Committee Index:

Aggregation Bits:

11111111 11111111 11111101 11111111 11011111 11111111 11111111 0111111
11111111 10111011 11111111 11111111 11110111 11111111 11111111 1111011
11010111 1

Validators:

7216 21059 11997 1429 17498 7430 29629 16755 13879 13989 6772 10773 11826 11898 15145 18474 7107 20785 5073 13418 10505 23372 6709 19910 18027 3216 2328 26289 11305 14446 16578 13318 16794 3727 26590 2860 11514 8030 27320 3873 20178 17438 20090 30536 22346 27781 23715 7712 13383 5718 19590 22866 21165 18047 12873 13808 12260 25690 7964 25315 1869 1516 4432 13833 12807 5674 14345 18618 25514 9649 4781 15630 10445 14273 1642 13245 5308 21288 16493 9522 21019 9607 2634 1816 13899 14988 17310 18792 8968 21075 17620 7384 6907 23908 8368 26291 1334 21555 26893 22954 24080 3540 26781 12668 9038 21051 20390 10710 9454 4607 29210 18971 17685 5239 25554 5396 9731 13578 17622 29335 12430 9843 14069 23756 29808 17918 23885 2461

Beacon Block Root:

0x432ddd1335026f1e3d92356af39a8043bff6cc0dd550fea45fdfd18b509eeacd

Source:

Epoch 5063 (0x27efe9b0c9532096ceec5e9b348c1ed45f769fe51c0afd967addf406ce009ac7)

Target:

Epoch 5064 (0xacdafe6e3dd13b1f2e341f98de048ee3470cf23b753defefa97c7c09f42cf5a1)

Signature:

0x864a301e040cfd493f9cc82e634c4bdf85099a1288ab58dcaea4796e4bf3a30c11fa16efeeb19a5d2652095bbfab02280be5a1a27e5290b80cd66b1505512883391ac760f80ca7aaa6598e957b9c05b0331ef0cf896c0fc3b123c2817d2210f7

Attestation 5

Slot:

162065

Committee Index:

Aggregation Bits:

11111111 10110111 10111111 11111111 11111011 11111111 11111111 111111
11111111 11111111 10111111 10111111 11111111 11111111 11111101 1111111
10111111 0

Validators:

19299 26585 15964 23192 3251 2432 12949 23124 18982 7911 10741 26821 6171 11382 14802 12731 27088 25703 13431 27161 20523 13908 11433 11645 3716 14352 23075 29893 29871 28323 22598 3492 13447 14265 13535 23776 10077 20205 25291 30653 18787 10385 10229 26728 28246 8086 10010 1294 28963 13905 13083 9276 30386 25876 16357 25697 1803 18925 16934 17057 28747 20807 10613 18343 21559 5151 15762 3094 21614 18262 25549 25508 11219 30429 2251 2554 2955 23771 25369 18006 7072 21389 15803 6521 3889 22004 18349 11262 5401 11783 20171 23258 8162 10056 10726 19273 11462 5274 3325 16119 5622 20560 25481 22107 4315 13365 17840 11971 22202 22395 22752 26014 25743 26753 18476 11625 1215 29938 23796 9567 17304 3219 4748 8904 14361 11473 21499

Beacon Block Root:

0x432ddd1335026f1e3d92356af39a8043bff6cc0dd550fea45fdfd18b509eeacd

Source:

Epoch 5063 (0x27efe9b0c9532096ceec5e9b348c1ed45f769fe51c0afd967addf406ce009ac7)

Target:

Epoch 5064 (0xacdafe6e3dd13b1f2e341f98de048ee3470cf23b753defefa97c7c09f42cf5a1)

Signature:

0xa2e3f2402894fb704ffe23827ee112b0c9a8162d77a90ba38682508d2ce2008bd485ac90bebfe171c8bf0b765cf991d60ca436a718198e09c12a4d22c76b2ec4917d0bcf9bc57a8cf4f5cadc8f1350ee621c3a31e96989607bb53f8ccbf2147d

Attestation 6

Slot:

162065

Committee Index:

Aggregation Bits:

10111111 11111111 11111110 01111111 11111110 11111111 11111111 1111111
10111101 10111011 11111110 11111111 11111101 11111111 11111111 1111101
11111110 1

Validators:

20727 20308 13559 22533 29613 11353 1113 23187 1332 25723 7850 27751 26979 2978 2749 2346 3146 28907 13024 29500 1295 9040 5828 13272 10825 20132 21695 14625 12981 10321 12782 11088 2881 18853 27715 3482 19078 22853 4864 13501 16702 25772 25895 3407 13441 12314 7385 27470 22697 29078 2887 21744 18425 11013 14378 2217 4479 2988 27607 15529 28074 29736 29269 6135 8014 5926 23461 23221 20322 5265 17099 18348 12429 13144 30191 11784 28253 1436 16404 3449 1745 14028 2393 4155 3767 2660 6587 7914 15493 23727 27546 9547 17374 30582 15431 13983 12585 11965 18057 28516 2255 16398 13597 10399 3344 4227 2840 9654 12696 30166 16304 26441 23649 10979 9967 29131 28960 15002 15015 14268 5726 12679 1370 25599 30669

Beacon Block Root:

0x432ddd1335026f1e3d92356af39a8043bff6cc0dd550fea45fdfd18b509eeacd

Source:

Epoch 5063 (0x27efe9b0c9532096ceec5e9b348c1ed45f769fe51c0afd967addf406ce009ac7)

Target:

Epoch 5064 (0xacdafe6e3dd13b1f2e341f98de048ee3470cf23b753defefa97c7c09f42cf5a1)

Signature:

0xa95fa110a8a09f021fac1b8548f7d061d2ace05017299e0d1916d28c1ccc2d60f0a09ecd565101d42bab6638521a190e08339a58f93b7b9d565dc0990865e533b07bfa50ac48798f530fd29fab57d9fc519fb73af8b91898aed016cfa86f9825

Attestation 7

Slot:

162065

Committee Index:

Aggregation Bits:

01000000 11000010 01010100 00000010 10000000 00100001 10100000 0
00100100 00010010 10000100 01100010 00100000 00100001 10000000 0
01010001 0

Validators:

Beacon Block Root:

0x432ddd1335026f1e3d92356af39a8043bff6cc0dd550fea45fdfd18b509eeacd

Source:

Epoch 5063 (0x27efe9b0c9532096ceec5e9b348c1ed45f769fe51c0afd967addf406ce009ac7)

Target:

Epoch 5064 (0xacdafe6e3dd13b1f2e341f98de048ee3470cf23b753defefa97c7c09f42cf5a1)

Signature:

0x8198c02ca2a99b11edb0359f58b017d2b849e1dcebba3bcab48788de50871fed9f2a80b3e844d976cdac357d3c5da67b18d106d7d260734e0cd0123730ce7f39911a0f411273b9cf357d6c82c5207bc1898ab3aac58d41354db71b7eaba6dd50

Attestation 8

Slot:

162065

Committee Index:

Aggregation Bits:

01010011 00000000 00000000 00011101 00000110 00000000 00000000 010001
00011100 00000100 01000000 00010000 00000000 00000000 10000101 000001
00000001 0

Validators:

Beacon Block Root:

0x432ddd1335026f1e3d92356af39a8043bff6cc0dd550fea45fdfd18b509eeacd

Source:

Epoch 5063 (0x27efe9b0c9532096ceec5e9b348c1ed45f769fe51c0afd967addf406ce009ac7)

Target:

Epoch 5064 (0xacdafe6e3dd13b1f2e341f98de048ee3470cf23b753defefa97c7c09f42cf5a1)

Signature:

0xa27ee66c3ca55a9e71fbfd1c799520e018b3486d4af35f84c397618220ebb38077f8c41561f93b58902c2b5d994f04180cb5c856621b0924dea4b98ba7eeab04d44c7d7a2acdd9d61f1d0c8b4c4ce86a69dc2f73e90c401d859545c25d2bc370

Attestation 9

Slot:

162065

Committee Index:

Aggregation Bits:

10110000 10000000 00000000 00101010 00000000 00010000 10000000 001
00000000 10110000 00000000 00100000 01100000 11000000 10000000 0
11100000 0

Validators:

Beacon Block Root:

0x432ddd1335026f1e3d92356af39a8043bff6cc0dd550fea45fdfd18b509eeacd

Source:

Epoch 5063 (0x27efe9b0c9532096ceec5e9b348c1ed45f769fe51c0afd967addf406ce009ac7)

Target:

Epoch 5064 (0xacdafe6e3dd13b1f2e341f98de048ee3470cf23b753defefa97c7c09f42cf5a1)

Signature:

0xa7d4c02880e54a8c47426a0f1df7b2b79857fc54ecb57c6260ae9f86d54980825b328784eecf1a03ec0c22b5a7bfcc8d11c5a73c4ea1e4df30133c053c7119d91d3312ba1ae1813b2fe12c5a3bd023c70530fe0b0015df2674d16daf31b2add1

Attestation 10

Slot:

162065

Committee Index:

Aggregation Bits:

00010001 00000000 10000101 10001000 00011011 01000000 00000100 0
00100000 00000000 00010000 00000000 01100000 00001000 10000000 0
00000100 0

Validators:

Beacon Block Root:

0x432ddd1335026f1e3d92356af39a8043bff6cc0dd550fea45fdfd18b509eeacd

Source:

Epoch 5063 (0x27efe9b0c9532096ceec5e9b348c1ed45f769fe51c0afd967addf406ce009ac7)

Target:

Epoch 5064 (0xacdafe6e3dd13b1f2e341f98de048ee3470cf23b753defefa97c7c09f42cf5a1)

Signature:

0xac5d7e8a3c0f78b667240f3d172e4f1ed4cebad5f68d8f558c4faae5adbc5f4252befa02859edf7194e2a573b26a0c1a19fd172ae0d78741e472259de07681b2483b139f230d9751c1d007b4b06643aba6ecd6ead7ed30e63e29957cf2107f6d

Attestation 11

Slot:

162065

Committee Index:

Aggregation Bits:

00010000 00000000 00000000 00110011 00010000 00000000 10000001 1
00000001 00010000 00000000 00010000 01000011 00000001 01000000 0
00000000 0

Validators:

28034 28222 23540 14484 23288 13551 28694 23358 13466 28407 15251 28072 23872 23480 15681 27957 23670 14439 15086

Beacon Block Root:

0x432ddd1335026f1e3d92356af39a8043bff6cc0dd550fea45fdfd18b509eeacd

Source:

Epoch 5063 (0x27efe9b0c9532096ceec5e9b348c1ed45f769fe51c0afd967addf406ce009ac7)

Target:

Epoch 5064 (0xacdafe6e3dd13b1f2e341f98de048ee3470cf23b753defefa97c7c09f42cf5a1)

Signature:

0xb58efe24518d9b81a341bb436744eb04cfa45a0f384a8a5eafefed30dc31a885fb60b0ef1941b19e197e419ca68083e5185646f4f9d468c7daa1544f5e66cf92d240a09f2d24ce25cf35ebb43260eb559d80388196190ba683004e7957801e33

Attestation 12

Slot:

162065

Committee Index:

Aggregation Bits:

00000000 01001100 00000000 10000001 00011000 00000000 01100000 0
00000000 00000000 10000010 00000000 00000000 00000100 01101000 0
01110000 0

Validators:

13564 14344 13360 13493 28273 27893 14339 24016 14349 23928 14411 15273 13399 23562 13246 23225 28234 23162 14916

Beacon Block Root:

0x432ddd1335026f1e3d92356af39a8043bff6cc0dd550fea45fdfd18b509eeacd

Source:

Epoch 5063 (0x27efe9b0c9532096ceec5e9b348c1ed45f769fe51c0afd967addf406ce009ac7)

Target:

Epoch 5064 (0xacdafe6e3dd13b1f2e341f98de048ee3470cf23b753defefa97c7c09f42cf5a1)

Signature:

0x8b0d3f8898f22faf38c80000d89ec3f5bbffe06aca99a676b962035479c9c51dd37488e939fc02c6aa85ef48217eacb915af7a3870eb4d5640dea0ca1bbb30bbd2f10bcbaaf1dcc47e242528738893f64307e5a0ddc7b08d92c33441c9f00020

Attestation 13

Slot:

162065

Committee Index:

Aggregation Bits:

00000000 00000000 10000000 00000000 00101000 00010000 00000000 0
01100100 00000000 00000000 00010000 00000000 00000000 10000000 0
10000000 0

Validators:

20514 14559 14634 13549 20333 13408 13411 14227 13552 20101 20380 13460

Beacon Block Root:

0x432ddd1335026f1e3d92356af39a8043bff6cc0dd550fea45fdfd18b509eeacd

Source:

Epoch 5063 (0x27efe9b0c9532096ceec5e9b348c1ed45f769fe51c0afd967addf406ce009ac7)

Target:

Epoch 5064 (0xacdafe6e3dd13b1f2e341f98de048ee3470cf23b753defefa97c7c09f42cf5a1)

Signature:

0x866e04cb83290a08bad4a3bf22dedaab0fc5868fbb220df2a74f97fb520af96284f14a35f3e1990432b96f9f423a7f9b10328ddfceaa86c59a209c67167a3395e973b30b04eabe59bea14f0093a2b539bc0fe99db1438e71d7c312617c534c8a