[TESTNET BUG] reward_slot_holders endpoint isn't always showing the correct address

[BowTiedDevOps]

Describe the bug

Since the Bitcoin chain behind Testnet is regtest, some of the addresses on the reward_slot_holders page are not in the correct format (i.e. they are testnet addresses instead of regtest ones, even if the node processes them as regtest addresses).

Steps To Reproduce

For example, at block 54053, the 2 rewarded addresses according to the bitcoin chain were:

• mgZ5KJFnXmSvdrPNR7eQGz2RUKeqBanpAM
• bcrt1qxnzlc57krja4jzq6vq3fylll0rydxr2xst4erg

However, the reward_slot_holders endpoint shows one of the addresses as a testnet one (tb1qxnzlc57krja4jzq6vq3fylll0rydxr2xjzv55p):

Going to the individual reward_slot_holders for each address:

• mgZ5KJFnXmSvdrPNR7eQGz2RUKeqBanpAM - is being shown right
• tb1qxnzlc57krja4jzq6vq3fylll0rydxr2xjzv55p - the address does not exist on the bitcoin chain, however the reward slots received by bcrt1qxnzlc57krja4jzq6vq3fylll0rydxr2xst4erg appear here
• bcrt1qxnzlc57krja4jzq6vq3fylll0rydxr2xst4erg - no reward slots shown, even though they were received

This example is relevant because tb1qxnzlc57krja4jzq6vq3fylll0rydxr2xjzv55p and bcrt1qxnzlc57krja4jzq6vq3fylll0rydxr2xst4erg contain the same version and hashbytes, but the first is on testnet while the last one is on regtest.

Expected behavior

The reward slot holders endpoint should show the slots received by tb1qxnzlc57krja4jzq6vq3fylll0rydxr2xjzv55p under the bcrt1qxnzlc57krja4jzq6vq3fylll0rydxr2xst4erg address instead.

Environment

Hosted API (https://api.testnet.hiro.so) and hosted bitcoin explorer (https://mempool.bitcoin.regtest.hiro.so)

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Minor, Non-launch blocking bugs

Minor bugs

• Bugs in non-critical software (CLI, UI, etc) that doesn’t impact critical functionality