Boro_Coin_1

Franklin

We have a government seized Boro Wallet with 51.42 bc before any transactions occurred. Sadly, the suspect refuses to give us the private key. Can you retrieve the key?

Boro Coin uses standard secp256k1 ECDSA. A transaction hash is generated by taking the SHA-256 of the string format: "sender:recipient:amount" (Colons included!) The JSON will give you all the transactions ever made with the wallet.

Note: This challenge does not contain a flag. You will need to submit the private key (lowercase hex, no prefix) as the flag. Example: boroCTF{7f2a4b...}