Fetch blocks
Overview
The block endpoint allows you to fetch blocks at a certain block height. It is the implementation of the /block endpoint of the Rosetta API standard.
Prerequisites
Your Rosetta instance is up and running under the address
0.0.0.0:8082.Make sure to use the correct
NetworkIdentifier. For this example the following arbitraryBlockIdentifieris used:
"block_identifier": {
"index": 1357691,
"hash": "0415ed9ea78fed787e125179c99a7d0e599ee6e4cb0d610eed2c791e6e3f5e19"
}
The BlockIdentifer required here is a PartialBlockIdentifier, which means you can either provide the index, the hash or both. For example, you can select a transaction of interest in the ckBTC dashboard and use the index displayed there to fetch the corresponding block from Rosetta. The following example only provides the index, but you are free to use the full BlockIdentifier or only the hash.
If you are connecting to a different ICRC-1 ledger other than the ckBTC ledger, you cannot use the index and hash from the ckBTC ledger.
Example
The request will resemble the following:
curl --location '0.0.0.0:8082/block' --header 'Content-Type: application/json' --data '{
"network_identifier": {
"blockchain": "Internet Computer",
"network": "mxzaz-hqaaa-aaaar-qaada-cai"
},
"block_identifier": {
"index": 1357691
}
}'
The response will give you the transaction within the block, in this case it is a transfer between accounts. While the operation field shows you the basic information about the operation, the metadata of the transaction reveals information specific to ICRC-1 transactions such as the memo, the fee_collector_block_index and created_at_time. The operation name and metadata varies between operation types. It is recommended to try and fetch a block of interest and see how the metadata and operation is formed to acquire an understanding of how the ICRC Rosetta implementation parses the block information for various operation types.
{
"block": {
"block_identifier": {
"index": 1357691,
"hash": "0415ed9ea78fed787e125179c99a7d0e599ee6e4cb0d610eed2c791e6e3f5e19"
},
"parent_block_identifier": {
"index": 1357690,
"hash": "733a2ca495090d99c5e87898d16cc3903a351da436d57e795e01fcaeb37d3ddb"
},
"timestamp": 1712825491835,
"transactions": [
{
"transaction_identifier": {
"hash": "700481a99b9a10cf4c4d037141ae5f1472fefe1f5be6b43d02577e398da4bdfe"
},
"operations": [
{
"operation_identifier": {
"index": 3
},
"related_operations": [
{
"index": 4
},
{
"index": 5
}
],
"type": "TRANSFER",
"status": "COMPLETED",
"account": {
"address": "lrf2i-zba54-pygwt-tbi75-zvlz4-7gfhh-ylcrq-2zh73-6brgn-45jy5-cae",
"sub_account": {
"address": "0000000000000000000000000000000000000000000000000000000000000000"
}
},
"amount": {
"value": "230407",
"currency": {
"symbol": "ckBTC",
"decimals": 8
}
}
},
{
"operation_identifier": {
"index": 4
},
"related_operations": [
{
"index": 3
},
{
"index": 5
}
],
"type": "TRANSFER",
"status": "COMPLETED",
"account": {
"address": "xmiu5-jqaaa-aaaag-qbz7q-cai",
"sub_account": {
"address": "0000000000000000000000000000000000000000000000000000000000000000"
}
},
"amount": {
"value": "-230407",
"currency": {
"symbol": "ckBTC",
"decimals": 8
}
}
},
{
"operation_identifier": {
"index": 5
},
"related_operations": [
{
"index": 3
},
{
"index": 4
}
],
"type": "FEE",
"status": "COMPLETED",
"account": {
"address": "xmiu5-jqaaa-aaaag-qbz7q-cai",
"sub_account": {
"address": "0000000000000000000000000000000000000000000000000000000000000000"
}
},
"amount": {
"value": "-10",
"currency": {
"symbol": "ckBTC",
"decimals": 8
}
},
"metadata": {
"fee_set_by": "User"
}
}
],
"metadata": {
"memo": [
0,
0,
0,
0,
0,
0,
249,
198
]
}
}
],
"metadata": {
"block_created_at_nano_seconds": 1712825491835944099,
"fee_collector_block_index": 39493
}
}
}