Abstract BitcoinEsploraApiProvider

[matthewjablack]

Description

This PR abstract elements of BitcoinEsploraApiProvider, so that it can be better used alongside BitcoinRpcProvider

One example of this is getUnspentTransactions

Here is a typical response from BitcoinRpcProvider

[ { txid: '36ae54d1aec4027f6d37b1f78ea4d1eed56d3a6894b29e9ecd52ba5337e58986',
    vout: 0,
    address: 'bcrt1qn6qvwfuypdglmsz0zvssperewad7j9e3f3mn86zvysl9e3ddjrts3mgctu',
    label: '',
    scriptPubKey: '00209e80c727840b51fdc04f132100e479775be917314c7733e84c243e5cc5ad90d7',
    amount: 0.00196033,
    confirmations: 3,
    spendable: false,
    solvable: false,
    safe: true,
    satoshis: 196033 } ]

New EsploraApiProvider response

{ txid: '8ac344f5d0b464b19cbbe91b2fb588b52e949d06e41fed3eef46d393c22f9e3b',
    vout: 0,
    status:
     { confirmed: true,
       block_height: 1577116,
       block_hash: '000000000000004c211ce88c7006bc676d8cb515abf075f8cbd64237a327d318',
       block_time: 1567802898 },
    value: 5152772,
    address: 'mtkU1Fdn1FKYSHDXbm4NJji13UbVUmhz8d',
    satoshis: 5152772,
    amount: 0.05152772,
    confirmations: 1101 } ]

Example

Submission Checklist 📝

• Add confirmations to BitcoinEsploraApiProvider for getUnspentTransactions

[monokh]

Nice one