About transaction_hash and BlockIndex of ICPledger?

Developers Language Support
1

How to get valid transaction_hash?
Because after using ICPledger.transfer, the return value is only BlockIndex, without transaction_hash, and at the same time, query_blocks cannot be used to query without transaction_hash.
Because it is found in ICP Explorer https://dashboard.internetcomputer.org/transactions, only transaction_hash can be viewed.

In this way, the transaction can only be browsed by obtaining the transaction_hash in advance. How to obtain the transaction_hash?
Or is it possible to view transactions by BlockIndex?
Thanks!

1 Like
2

Looking forward to the replies from the big guys

3

query_blocks method of ICP ledger canister takes block Index and length as argument not tx_hash.

4

I know, but guiding users to view transactions in ICP Explorer requires knowing the transaction_ hash

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5

Looking forward to expert answers

6

Well not necessarily. You can get it by blockIndex.

Tx details using blockIndex and hashes can be pulled from rosetta api as well. Check these implementation here : https://github.com/dfinityexplorer/dfinityexplorer-dashboard/blob/main/web/src/rosetta/RosettaApi.js
https://github.com/dfinityexplorer/dfinityexplorer-dashboard/blob/630107275f270a22d5ff6bdf0f090a74d0ccaafe/web/src/rosetta/RosettaApi.js#L241

Also I am not an expert or a big guy, so hoping it will help :slight_smile:

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7

The blcokchain explorer accepts the BlockIndex but only int he URL, not as a search query.

So to get what you want, simply construct the URL like this:

https://dashboard.internetcomputer.org/transaction/`BlockIndex`

For example: https://dashboard.internetcomputer.org/transaction/10500226

2 Likes
8

I’ve been asking myself the same question. The truth is that you don’t need the transaction Hash anymore.

However if you do decide to calculate it, this might help :

The SHA256 of this serialised CBOR:
https://cbor.nemo157.com/#type=hex&value=a300a102a4007840653933343436313363393631356138336366313537343864393236356337376237363234343136363637386434613066643564663133313836633634623963340178406238376636303164353038633266653139363764316561636562346538313230356537376532396463343665623936646632303238383831656434633966386302a1001a549411b003a100192710011a654b4fd802a1001b17959aa2607b5b8f

maps to the hash of this transaction : https://dashboard.internetcomputer.org/transaction/e609323577ef35afca168a5b45504549889f4086dba5ef4fae8d9dfb2e9666e0

the process is described here : Ledger canister | Internet Computer