Blumbus Testnet Transaction Hash (Txhash) Details

This is Testnet block explorer of Blumbus Testnet

Transaction Details

Overview State

Transaction Hash: 12840F1947910C859C678D2C9D459E9746C674F896908791CACA0ED7395A20DB

Status:

Success

Block:

5628753 38,162 Blocks Confirmations

Time:

2 days ago (2025-01-11 09:43:17 UTC)

Action:

Value:

0 DYM (0 USD)

You are viewing a Testnet transaction

DYM price:

0 USD / DYM

Gas limit & Usage by Txn:

737,719 | 459,710 (62.32%)

Fee:

0.01475438 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": "48371", "block_id": {"hash": "PKYQrnWf7ndfb7LyhbJbJl9l2LJQkeXvspwQSk4q4fI=", "part_set_header": {"hash": "PKYQrnWf7ndfb7LyhbJbJl9l2LJQkeXvspwQSk4q4fI=", "total": 1}}, "signatures": [{"signature": "f17tyUI24APJFznauVLAdg71zsylf9/9j686g52HKivQ/ghT4k/Z+zY0UFBkUe6oOCSMBp6bhjUtStz//zSaDQ==", "timestamp": "2025-01-11T09:43:17.464258988Z", "block_id_flag": "BLOCK_ID_FLAG_COMMIT", "validator_address": "xl/CEWwkhP/r105V8i1sk/9mauQ="}]}, "header": {"time": "2025-01-11T09:43:17.464219084Z", "height": "48371", "version": {"app": "0", "block": "11"}, "app_hash": "F65Tadwxs+guR10Dm4Ch+yJx2dlUju2LrH2ire02QBg=", "chain_id": "odysphere_654689-1", "data_hash": "mnFImjL/+ntcJo4KOMIoDzRpTkt4SprWjEELilynTmQ=", "evidence_hash": "Tlm/JzcrEwS8CxN9G+nVZq1YsVS2prV3ivf0FLHUuEw=", "last_block_id": {"hash": "tkt79lgiYM6HyspfwyMMAO5NNRDz8jFuAxRPDejuF8w=", "part_set_header": {"hash": "tkt79lgiYM6HyspfwyMMAO5NNRDz8jFuAxRPDejuF8w=", "total": 1}}, "consensus_hash": "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA=", "validators_hash": "T0B3v7NyM4SUK8QZ+H/2sJdgJk4UHXDWlcQ4kNZ43us=", "last_commit_hash": "sEKGKI3cmqhPtgLUCWSyLlk8GOBjXL8q39WPayOIU5g=", "proposer_address": "xl/CEWwkhP/r105V8i1sk/9mauQ=", "last_results_hash": "5dPH4H3zP9WbVqYAmSo2CmbYPO5/g5SHPQN71Jr3Z9A=", "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": "48366", "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

1-48371

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

ibc_client

0.0

IBC Acknowledgement (seq_no 4568) ibc.core.channel.v1.MsgAcknowledgement

👉 Explain here

Transfer	50F4B65B92E97FC43A83F9DBBAD9EA2687136CB281C9F3A7EED0078A046C107D
to odysphere_654689-1
v
Acknowledgement	12840F1947910C859C678D2C9D459E9746C674F896908791CACA0ED7395A20DB

{"@type": "/ibc.core.channel.v1.MsgAcknowledgement", "packet": {"data": "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", "sequence": "4568", "source_port": "transfer", "source_channel": "channel-54", "timeout_height": {"revision_height": "1", "revision_number": "9999"}, "destination_port": "transfer", "timeout_timestamp": "1736589100000000000", "destination_channel": "channel-0"}, "signer": "dym1nztjrfpna020deyac9585vck729khgznek4pvc", "proof_acked": "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", "proof_height": {"revision_height": "48371", "revision_number": "1"}, "acknowledgement": "eyJyZXN1bHQiOiJBUT09In0="}

{"denom":"adym","amount":"9000000000000000000","sender":"dym1gyw5fc4wj6myr5zwgrchaezvz4yp3lgmnn4fq2","receiver":"ody1gyw5fc4wj6myr5zwgrchaezvz4yp3lgmzzxwh5","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

1736589100000000000

4568

transfer

channel-54

transfer

channel-0

ORDER_UNORDERED

connection-66

ibc_channel

odysphere_654689-1

PENDING

transfer

channel-54

transfer

channel-0

4568

48371

ON_ACK

success

adym

9000000000000000000

dym1gyw5fc4wj6myr5zwgrchaezvz4yp3lgmnn4fq2

ody1gyw5fc4wj6myr5zwgrchaezvz4yp3lgmzzxwh5

{"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 4567) ibc.core.channel.v1.MsgAcknowledgement

👉 Explain here

Transfer	70E4A9B766284FBA69F0450EC6C4A58EF5E4AB155DF5A350B090F4FECE03E2DB
to odysphere_654689-1
v
Acknowledgement	12840F1947910C859C678D2C9D459E9746C674F896908791CACA0ED7395A20DB

{"@type": "/ibc.core.channel.v1.MsgAcknowledgement", "packet": {"data": "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", "sequence": "4567", "source_port": "transfer", "source_channel": "channel-54", "timeout_height": {"revision_height": "1", "revision_number": "9999"}, "destination_port": "transfer", "timeout_timestamp": "1736589100000000000", "destination_channel": "channel-0"}, "signer": "dym1nztjrfpna020deyac9585vck729khgznek4pvc", "proof_acked": "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", "proof_height": {"revision_height": "48371", "revision_number": "1"}, "acknowledgement": "eyJyZXN1bHQiOiJBUT09In0="}

{"denom":"adym","amount":"1500000000000000000","sender":"dym14tk83d7u6c7gxa2jssk6d288ykua7msenls90d","receiver":"ody14tk83d7u6c7gxa2jssk6d288ykua7msezwrzcn","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

1736589100000000000

4567

transfer

channel-54

transfer

channel-0

ORDER_UNORDERED

connection-66

ibc_channel

odysphere_654689-1

PENDING

transfer

channel-54

transfer

channel-0

4567

48371

ON_ACK

success

adym

1500000000000000000

dym14tk83d7u6c7gxa2jssk6d288ykua7msenls90d

ody14tk83d7u6c7gxa2jssk6d288ykua7msezwrzcn

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
0x4ba86208c1382cff7b38e239a20deeef5b5711b3 0x4ba86208c1382cff7b38e239a20deeef5b5711b3	DYM	0	10.0
0x603871c2ddd41c26ee77495e2e31e6de7f9957e0 0x603871c2ddd41c26ee77495e2e31e6de7f9957e0	DYM	0	0
0x93354845030274cd4bf1686abd60ab28ec52e1a7 0x93354845030274cd4bf1686abd60ab28ec52e1a7	DYM	78,769,637.167187791466451532	78,769,650.834036230040895109
0x989721a433ebd4f6e49dc1687a3316f28b6ba053 0x989721a433ebd4f6e49dc1687a3316f28b6ba053	DYM	950.6562135	950.64145912
0xb0fec94f370824b5f4eb80f212d75caf125b9297 0xb0fec94f370824b5f4eb80f212d75caf125b9297	DYM	943,250.0	943,240.0
0xdc6f17bbec824fff8f86587966b2047db6ab7367 0xdc6f17bbec824fff8f86587966b2047db6ab7367	DYM	0	0
0xf1829676db577682e944fc3493d451b67ff3e29f 0xf1829676db577682e944fc3493d451b67ff3e29f	DYM	0.0107706	0.01475438

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