How to interpret the output of the assets endpoint

Question

I'm looking to list all unique assets on the network, per this endpoint/sdk.

I understand there are interesting public aggregations of this information, such as:

• https://stellarasset.com/
• https://stellar.expert/explorer/public/asset/

When I check this endpoint, I see:

>>> pprint(horizon.assets())
{'_embedded': {'records': [{'_links': {'toml': {'href': ''}},
                            'amount': '4000000000.0000000',
                            'asset_code': '0000',
                            'asset_issuer': 'GABPCGEMJIYUJDZX776447T6GG7SDXUTWU7WKHUQZ2JJLRHASAQ5MRLR',
                            'asset_type': 'credit_alphanum4',
                            'flags': {'auth_immutable': False,
                                      'auth_required': False,
                                      'auth_revocable': False},
                            'num_accounts': 53,
                            'paging_token': '0000_GABPCGEMJIYUJDZX776447T6GG7SDXUTWU7WKHUQZ2JJLRHASAQ5MRLR_credit_alphanum4'},
                           {'_links': {'toml': {'href': ''}},
                            'amount': '0.0000000',
                            'asset_code': '0',
                            'asset_issuer': 'GCXNL5HM2S72K5HPSKYC7I4EF2GLAPPH2PUOP5S2G32YCAFDOV36I2M7',
                            'asset_type': 'credit_alphanum4',
                            'flags': {'auth_immutable': False,
                                      'auth_required': False,
                                      'auth_revocable': False},
                            'num_accounts': 0,
                            'paging_token': '0_GCXNL5HM2S72K5HPSKYC7I4EF2GLAPPH2PUOP5S2G32YCAFDOV36I2M7_credit_alphanum4'},
                           {'_links': {'toml': {'href': ''}},
                            'amount': '10000.0000000',
                            'asset_code': '10',
                            'asset_issuer': 'GANERK6YVYX5GUQBF4BN7PNFC6VX2Q54VFU53DK3UOC4O7CHXZEFZM47',
                            'asset_type': 'credit_alphanum4',
                            'flags': {'auth_immutable': False,
                                      'auth_required': False,
                                      'auth_revocable': False},
                            'num_accounts': 1,
                            'paging_token': '10_GANERK6YVYX5GUQBF4BN7PNFC6VX2Q54VFU53DK3UOC4O7CHXZEFZM47_credit_alphanum4'},
                           {'_links': {'toml': {'href': ''}},
                            'amount': '10000.0000000',
                            'asset_code': '10',
                            'asset_issuer': 'GBNSVOPN4XNQYEHL4GGPZF2EWL3NQZC6UTLFLXQSDB7XASTYS7RMGMZR',
                            'asset_type': 'credit_alphanum4',
                            'flags': {'auth_immutable': False,
                                      'auth_required': False,
                                      'auth_revocable': False},
                            'num_accounts': 1,
                            'paging_token': '10_GBNSVOPN4XNQYEHL4GGPZF2EWL3NQZC6UTLFLXQSDB7XASTYS7RMGMZR_credit_alphanum4'},
                           {'_links': {'toml': {'href': ''}},
                            'amount': '10000.0000000',
                            'asset_code': '10',
                            'asset_issuer': 'GCHBU6XOES7VT77HGBYCMXEK7ODK5HPLA36G3AMPKNBJ3PXIYHPG6WQX',
                            'asset_type': 'credit_alphanum4',
                            'flags': {'auth_immutable': False,
                                      'auth_required': False,
                                      'auth_revocable': False},
                            'num_accounts': 1,
                            'paging_token': '10_GCHBU6XOES7VT77HGBYCMXEK7ODK5HPLA36G3AMPKNBJ3PXIYHPG6WQX_credit_alphanum4'},
                           {'_links': {'toml': {'href': ''}},
                            'amount': '10000.0000000',
                            'asset_code': '10',
                            'asset_issuer': 'GCKJ3ANESYKGT4PWUXUIHRYWXLVP4EDLCVWFXX5VPMGNR3IGV6UHL6BM',
                            'asset_type': 'credit_alphanum4',
                            'flags': {'auth_immutable': False,
                                      'auth_required': False,
                                      'auth_revocable': False},
                            'num_accounts': 1,
                            'paging_token': '10_GCKJ3ANESYKGT4PWUXUIHRYWXLVP4EDLCVWFXX5VPMGNR3IGV6UHL6BM_credit_alphanum4'},
                           {'_links': {'toml': {'href': ''}},
                            'amount': '10000.0000000',
                            'asset_code': '10',
                            'asset_issuer': 'GCNTBVWJNBF7AJRQ7B5KDFK57RV5634FRZDCH26L6SMWTQNTCBNFWK5H',
                            'asset_type': 'credit_alphanum4',
                            'flags': {'auth_immutable': False,
                                      'auth_required': False,
                                      'auth_revocable': False},
                            'num_accounts': 1,
                            'paging_token': '10_GCNTBVWJNBF7AJRQ7B5KDFK57RV5634FRZDCH26L6SMWTQNTCBNFWK5H_credit_alphanum4'},
                           {'_links': {'toml': {'href': ''}},
                            'amount': '10000.0000000',
                            'asset_code': '10',
                            'asset_issuer': 'GDORDESN2MTZBZJSHY4AMOMP4VGKZDETRWYTH6S6Q33EK23W5BKU4H2T',
                            'asset_type': 'credit_alphanum4',
                            'flags': {'auth_immutable': False,
                                      'auth_required': False,
                                      'auth_revocable': False},
                            'num_accounts': 1,
                            'paging_token': '10_GDORDESN2MTZBZJSHY4AMOMP4VGKZDETRWYTH6S6Q33EK23W5BKU4H2T_credit_alphanum4'},
                           {'_links': {'toml': {'href': ''}},
                            'amount': '9200001.0000000',
                            'asset_code': '120784',
                            'asset_issuer': 'GCUEE3Q3WWQWD7L43KZCE5X3EFONBQDHA7EL6AUTXKFRCRNSEWGP52MQ',
                            'asset_type': 'credit_alphanum12',
                            'flags': {'auth_immutable': False,
                                      'auth_required': False,
                                      'auth_revocable': False},
                            'num_accounts': 95,
                            'paging_token': '120784_GCUEE3Q3WWQWD7L43KZCE5X3EFONBQDHA7EL6AUTXKFRCRNSEWGP52MQ_credit_alphanum12'},
                           {'_links': {'toml': {'href': ''}},
                            'amount': '9400000.0000000',
                            'asset_code': '121102',
                            'asset_issuer': 'GCUEE3Q3WWQWD7L43KZCE5X3EFONBQDHA7EL6AUTXKFRCRNSEWGP52MQ',
                            'asset_type': 'credit_alphanum12',
                            'flags': {'auth_immutable': False,
                                      'auth_required': False,
                                      'auth_revocable': False},
                            'num_accounts': 95,
                            'paging_token': '121102_GCUEE3Q3WWQWD7L43KZCE5X3EFONBQDHA7EL6AUTXKFRCRNSEWGP52MQ_credit_alphanum12'}]},
 '_links': {'next': {'href': 'https://horizon-testnet.stellar.org/assets?cursor=121102_GCUEE3Q3WWQWD7L43KZCE5X3EFONBQDHA7EL6AUTXKFRCRNSEWGP52MQ_credit_alphanum12&limit=10&order=asc'},
            'prev': {'href': 'https://horizon-testnet.stellar.org/assets?cursor=0000_GABPCGEMJIYUJDZX776447T6GG7SDXUTWU7WKHUQZ2JJLRHASAQ5MRLR_credit_alphanum4&limit=10&order=desc'},
            'self': {'href': 'https://horizon-testnet.stellar.org/assets?cursor=&limit=10&order=asc'}}}
>>> 

(On the testnet)

How should I interpret this? From information here, it looks like I can expect asset type and asset code, but it's unclear what is unique, or how best to interpret this information for basic data analysis, like understanding how much of what assets are available.

Answer 1

Assets are uniquely identified by their asset_code and asset_issuer.

Taking the first record as an example, there is no such thing as the 0000 asset. But there is an asset which is "0000" issued by GABPCGEMJIYUJDZX776447T6GG7SDXUTWU7WKHUQZ2JJLRHASAQ5MRLR

(I've never thought to ask or test if asset_type also forms part of the identifier, but I expect it doesn't. EDIT: From brief testing, asset_type does not form part of the identifier, because it's implicit in the length of the asset_code).

amount is the cumulative amount in circulation. num_accounts is the number of accounts trusting the asset.