Blumbus Testnet Transaction Hash (Txhash) Details

This is Testnet block explorer of Blumbus Testnet

Transaction Details

Overview State

Transaction Hash: 2B38FE4E9C2D9896BBD064BB2449B2115162CF277CB72314967C193A27CB0686

Status:

Success

Block:

5631828 68,982 Blocks Confirmations

Time:

4 days ago (2025-01-11 14:26:07 UTC)

Action:

Value:

0 DYM (0 USD)

You are viewing a Testnet transaction

DYM price:

0 USD / DYM

Gas limit & Usage by Txn:

736,695 | 459,027 (62.31%)

Fee:

0.0147339 DYM (0 USD)

Fee paid by:

0x989721a433ebd4f6e49dc1687a3316f28b6ba053 0x989721a433ebd4f6e49dc1687a3316f28b6ba053

Memo:

rly(v0.3.4-v2.5.2-relayer-canon-7-rc)

Index

Value

Type

0.0

IBC Update Client ibc.core.client.v1.MsgUpdateClient

👉 Explain here

{"@type": "/ibc.core.client.v1.MsgUpdateClient", "signer": "dym1nztjrfpna020deyac9585vck729khgznek4pvc", "client_id": "07-tendermint-102", "client_message": {"@type": "/ibc.lightclients.tendermint.v1.Header", "signed_header": {"commit": {"round": 0, "height": "54769", "block_id": {"hash": "xCy53VFS61rX9FMFqKDThbYRHWKWk+UxK6aYU5z6ZnA=", "part_set_header": {"hash": "xCy53VFS61rX9FMFqKDThbYRHWKWk+UxK6aYU5z6ZnA=", "total": 1}}, "signatures": [{"signature": "0RH4B+MXEOCGvVo8qyxKepc+l97oDXPsnmVlbwT1YgZ/pgcKrcNJTe3MrqFXpBS4nBw1VcNskOFj91l7RxZ1CA==", "timestamp": "2025-01-11T14:26:09.064619584Z", "block_id_flag": "BLOCK_ID_FLAG_COMMIT", "validator_address": "xl/CEWwkhP/r105V8i1sk/9mauQ="}]}, "header": {"time": "2025-01-11T14:26:09.064590029Z", "height": "54769", "version": {"app": "0", "block": "11"}, "app_hash": "hpmxZyHCymEBjRpeBkXlAxIsr/tDA8Jy54qyEZ2iCWs=", "chain_id": "odysphere_654689-1", "data_hash": "M3Bemq/Cig0fjWEs1HZzr8zVP/A+Uwb/9liSrrdOX5Q=", "evidence_hash": "Tlm/JzcrEwS8CxN9G+nVZq1YsVS2prV3ivf0FLHUuEw=", "last_block_id": {"hash": "/yF4LBVzZemEpmdYQskc80pF9en6Gf1fmlN5jezPCBE=", "part_set_header": {"hash": "/yF4LBVzZemEpmdYQskc80pF9en6Gf1fmlN5jezPCBE=", "total": 1}}, "consensus_hash": "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA=", "validators_hash": "T0B3v7NyM4SUK8QZ+H/2sJdgJk4UHXDWlcQ4kNZ43us=", "last_commit_hash": "8DozxKlFfPihV9K+XhOI/9QdZdqGbtlfTt4Uo2QUemc=", "proposer_address": "xl/CEWwkhP/r105V8i1sk/9mauQ=", "last_results_hash": "QrsOTBTABMZn8jcdZdTZpRs24wJCLE6+hntQ30RaHOk=", "next_validators_hash": "T0B3v7NyM4SUK8QZ+H/2sJdgJk4UHXDWlcQ4kNZ43us="}}, "validator_set": {"proposer": {"address": "xl/CEWwkhP/r105V8i1sk/9mauQ=", "pub_key": {"ed25519": "qUYw6uZ6dnMPunSb/y4/QiiXOtpkEYvBfKtsn7Pv03o="}, "voting_power": "1", "proposer_priority": "0"}, "validators": [{"address": "xl/CEWwkhP/r105V8i1sk/9mauQ=", "pub_key": {"ed25519": "qUYw6uZ6dnMPunSb/y4/QiiXOtpkEYvBfKtsn7Pv03o="}, "voting_power": "1", "proposer_priority": "0"}], "total_voting_power": "0"}, "trusted_height": {"revision_height": "54767", "revision_number": "1"}, "trusted_validators": {"proposer": {"address": "xl/CEWwkhP/r105V8i1sk/9mauQ=", "pub_key": {"ed25519": "qUYw6uZ6dnMPunSb/y4/QiiXOtpkEYvBfKtsn7Pv03o="}, "voting_power": "1", "proposer_priority": "0"}, "validators": [{"address": "xl/CEWwkhP/r105V8i1sk/9mauQ=", "pub_key": {"ed25519": "qUYw6uZ6dnMPunSb/y4/QiiXOtpkEYvBfKtsn7Pv03o="}, "voting_power": "1", "proposer_priority": "0"}], "total_voting_power": "0"}}}

/ibc.core.client.v1.MsgUpdateClient

dym1nztjrfpna020deyac9585vck729khgznek4pvc

07-tendermint-102

07-tendermint

1-54769

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

ibc_client

0.0

IBC Acknowledgement (seq_no 5570) ibc.core.channel.v1.MsgAcknowledgement

👉 Explain here

Transfer	7685BB3C04C77F6DF5D92E9CE7F7A739AD44E1C3B765363D0A50E5CDF78236C5
to odysphere_654689-1
v
Acknowledgement	2B38FE4E9C2D9896BBD064BB2449B2115162CF277CB72314967C193A27CB0686

{"@type": "/ibc.core.channel.v1.MsgAcknowledgement", "packet": {"data": "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", "sequence": "5570", "source_port": "transfer", "source_channel": "channel-54", "timeout_height": {"revision_height": "1", "revision_number": "9999"}, "destination_port": "transfer", "timeout_timestamp": "1736606100000000000", "destination_channel": "channel-0"}, "signer": "dym1nztjrfpna020deyac9585vck729khgznek4pvc", "proof_acked": "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", "proof_height": {"revision_height": "54769", "revision_number": "1"}, "acknowledgement": "eyJyZXN1bHQiOiJBUT09In0="}

{"denom":"adym","amount":"5000000000000000000","sender":"dym1wvahcs5czqkfxhcljlwpkkzstngwavjxz59z7n","receiver":"ody1wvahcs5czqkfxhcljlwpkkzstngwavjxn9k9fd","memo":"{\"denom_metadata\":{\"description\":\"Native protocol token of Dymension: DYM (adym)\",\"denom_units\":[{\"denom\":\"adym\"},{\"denom\":\"DYM\",\"exponent\":18}],\"base\":\"adym\",\"display\":\"DYM\",\"name\":\"DYM\",\"symbol\":\"DYM\"}}"}

/ibc.core.channel.v1.MsgAcknowledgement

dym1nztjrfpna020deyac9585vck729khgznek4pvc

9999-1

1736606100000000000

5570

transfer

channel-54

transfer

channel-0

ORDER_UNORDERED

connection-66

ibc_channel

odysphere_654689-1

PENDING

transfer

channel-54

transfer

channel-0

5570

54769

ON_ACK

success

adym

5000000000000000000

dym1wvahcs5czqkfxhcljlwpkkzstngwavjxz59z7n

ody1wvahcs5czqkfxhcljlwpkkzstngwavjxn9k9fd

{"denom_metadata":{"description":"Native protocol token of Dymension: DYM (adym)","denom_units":[{"denom":"adym"},{"denom":"DYM","exponent":18}],"base":"adym","display":"DYM","name":"DYM","symbol":"DYM"}}

0.0

IBC Acknowledgement (seq_no 5571) ibc.core.channel.v1.MsgAcknowledgement

👉 Explain here

Transfer	7674932398542362EFA084291241B5945EEB29C9E4CA1D9E1E5D6DF01820FB9D
to odysphere_654689-1
v
Acknowledgement	2B38FE4E9C2D9896BBD064BB2449B2115162CF277CB72314967C193A27CB0686

{"@type": "/ibc.core.channel.v1.MsgAcknowledgement", "packet": {"data": "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", "sequence": "5571", "source_port": "transfer", "source_channel": "channel-54", "timeout_height": {"revision_height": "1", "revision_number": "9999"}, "destination_port": "transfer", "timeout_timestamp": "1736606100000000000", "destination_channel": "channel-0"}, "signer": "dym1nztjrfpna020deyac9585vck729khgznek4pvc", "proof_acked": "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", "proof_height": {"revision_height": "54769", "revision_number": "1"}, "acknowledgement": "eyJyZXN1bHQiOiJBUT09In0="}

{"denom":"adym","amount":"10000000000000000000","sender":"dym1apnhvm4h8vh86g0x9d0j3fvwqmspexry8t9c83","receiver":"ody1apnhvm4h8vh86g0x9d0j3fvwqmspexryk6kls0","memo":"{\"denom_metadata\":{\"description\":\"Native protocol token of Dymension: DYM (adym)\",\"denom_units\":[{\"denom\":\"adym\"},{\"denom\":\"DYM\",\"exponent\":18}],\"base\":\"adym\",\"display\":\"DYM\",\"name\":\"DYM\",\"symbol\":\"DYM\"}}"}

/ibc.core.channel.v1.MsgAcknowledgement

dym1nztjrfpna020deyac9585vck729khgznek4pvc

9999-1

1736606100000000000

5571

transfer

channel-54

transfer

channel-0

ORDER_UNORDERED

connection-66

ibc_channel

odysphere_654689-1

PENDING

transfer

channel-54

transfer

channel-0

5571

54769

ON_ACK

success

adym

10000000000000000000

dym1apnhvm4h8vh86g0x9d0j3fvwqmspexry8t9c83

ody1apnhvm4h8vh86g0x9d0j3fvwqmspexryk6kls0

Advanced

Summary of state change recorded in the end of block

(therefore may contains addresses other than appeared within this transaction)

Address	Denom	Before	After
0x6041f237d822706ea4f6d52c10972c9004950304 0x6041f237d822706ea4f6d52c10972c9004950304	DYM	10.0	9.99542228
0x93354845030274cd4bf1686abd60ab28ec52e1a7 0x93354845030274cd4bf1686abd60ab28ec52e1a7	DYM	78,811,656.744685975799960224	78,811,670.411870182637150239
0x989721a433ebd4f6e49dc1687a3316f28b6ba053 0x989721a433ebd4f6e49dc1687a3316f28b6ba053	DYM	940.06686492	940.05213102
0xdc6f17bbec824fff8f86587966b2047db6ab7367 0xdc6f17bbec824fff8f86587966b2047db6ab7367	DYM	0	0
0xf1829676db577682e944fc3493d451b67ff3e29f 0xf1829676db577682e944fc3493d451b67ff3e29f	DYM	0.0105747	0.01931162

message > action

message > sender

update_client > client_id

update_client > client_type

update_client > consensus_height

update_client > consensus_heights

update_client > header

message > module

message > action

message > sender

acknowledge_packet > packet_timeout_height

acknowledge_packet > packet_timeout_timestamp

acknowledge_packet > packet_sequence

acknowledge_packet > packet_src_port

acknowledge_packet > packet_src_channel

acknowledge_packet > packet_dst_port

acknowledge_packet > packet_dst_channel

acknowledge_packet > packet_channel_ordering

acknowledge_packet > packet_connection

acknowledge_packet > connection_id

message > module

delayedack > rollapp_id

delayedack > status

delayedack > source_port

delayedack > source_channel

delayedack > destination_port

delayedack > destination_channel

delayedack > packet_sequence

delayedack > proof_height

delayedack > type

delayedack > acknowledgement

delayedack > packet_data_denom

delayedack > packet_data_amount

delayedack > packet_data_sender

delayedack > packet_data_receiver

delayedack > packet_data_memo

message > action

message > sender

acknowledge_packet > packet_timeout_height

acknowledge_packet > packet_timeout_timestamp

acknowledge_packet > packet_sequence

acknowledge_packet > packet_src_port

acknowledge_packet > packet_src_channel

acknowledge_packet > packet_dst_port

acknowledge_packet > packet_dst_channel

acknowledge_packet > packet_channel_ordering

acknowledge_packet > packet_connection

acknowledge_packet > connection_id

message > module

delayedack > rollapp_id

delayedack > status

delayedack > source_port

delayedack > source_channel

delayedack > destination_port

delayedack > destination_channel

delayedack > packet_sequence

delayedack > proof_height

delayedack > type

delayedack > acknowledgement

delayedack > packet_data_denom

delayedack > packet_data_amount

delayedack > packet_data_sender

delayedack > packet_data_receiver

delayedack > packet_data_memo