The decred package contains everything needed to create
Decred applications in Python.
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Pure-Python secp256k1 elliptic curve.
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Serializable and de-serializable python versions of important types from the
dcrd/wirepackage:MsgTx,BlockHeader,OutPoint, etc. -
BIP-0044 keys. Account creation and management. PGP mnemonic seeds.
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Network parameters for mainnet, testnet3, and simnet.
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Clients for the dcrdata block explorer API (websockets, pubsub, HTTP).
DcrdataClient is a dcrdata API client written in Python 3.
The constructor takes a single argument, which is the path to a dcrdata server,
including protocol, e.g. https://explorer.dcrdata.org/. The available
endpoints are gathered from the server when the client is created.
from decred.dcr.dcrdata import DcrdataClient
import json
client = DcrdataClient("https://explorer.dcrdata.org")
bestBlock = client.block.best()
print(json.dumps(bestBlock, indent=4, sort_keys=True))
Because the available dcrdata endpoints can change with new versions, the interface is generated by pulling a list of endpoints from the API itself. The acquired list does not include some endpoints, particularly the Insight API endpoints.
You can print an endpoint guide to the console with client.endpointGuide(),
or a Python list of URLs is returned from client.endpointList().
Depending on the version of dcrdata they are running, different servers might have different sets of endpoints.
In the examples directory there are scripts for creating and
using wallets, and for using dcrdata and matplotlib to plot Decred network data.
Here are some more examples:
def dumpResponse(obj):
print(json.dumps(obj, indent=4, sort_keys=True))
blockhash = "00000000000000000fe92d4a057bd4425c5f58fa9b4d5b34b6f2b596ff01b3c9"
txid = "355a6752539486503031d1a0bb62a3c53f83a4cad0765979510742b72b064f75"
# /block/hash/{blockhash} - Get data for a block with it's hash.
dumpResponse( client.block.hash(blockhash) )
# /block/hash/{blockhash}/verbose - Same thing, but more info.
dumpResponse( client.block.hash.verbose(blockhash) )
# /block/range/{idx0}/{idx}/{step}/size - Get the size of every 10th block from
# 299900 to 300000.
idx0 = 299900
idx = 300000
step = 10
dumpResponse( client.block.range.size(idx0, idx, step) )
# /tx/{txid}/in/{txinoutindex} - Get a single input to a transaction
txinoutindex = 0
dumpResponse( tx.__getattr__("in")(txid, txinoutindex) )
# arguments can also be passed as keyword argument, in which case the
# order doesn't matter, but don't mix positional and keyword.
thatOneBlock = "00000000000000000fe92d4a057bd4425c5f58fa9b4d5b34b6f2b596ff01b3c9"
dumpResponse( client.block.hash(blockhash=thatOneBlock) )
The dcrdata module includes websocket functionality as well. Subscribe to a block feed or updates for addresses.
client.emitter = dumpResponse
client.subscribeAddresses(["Dcur2mcGjmENx4DhNqDctW5wJCVyT3Qeqkx"])
input("press return to close")
address.amountflow(address, chartgrouping) -> /address/{address}/amountflow/{chartgrouping}
address.count(address, N) -> /address/{address}/count/{N}
address.count.raw(address, N) -> /address/{address}/count/{N}/raw
address.count.skip(address, N, M) -> /address/{address}/count/{N}/skip/{M}
address.count.skip.raw(address, N, M) -> /address/{address}/count/{N}/skip/{M}/raw
address.raw(address) -> /address/{address}/raw
address.totals(address) -> /address/{address}/totals
address.types(address, chartgrouping) -> /address/{address}/types/{chartgrouping}
block.best() -> /block/best
block.best.hash() -> /block/best/hash
block.best.header() -> /block/best/header
block.best.header.raw() -> /block/best/header/raw
block.best.height() -> /block/best/height
block.best.pos() -> /block/best/pos
block.best.raw() -> /block/best/raw
block.best.size() -> /block/best/size
block.best.subsidy() -> /block/best/subsidy
block.best.tx() -> /block/best/tx
block.best.tx.count() -> /block/best/tx/count
block.best.verbose() -> /block/best/verbose
block.hash(blockhash) -> /block/hash/{blockhash}
block.hash.header(blockhash) -> /block/hash/{blockhash}/header
block.hash.header.raw(blockhash -> /block/hash/{blockhash}/header/raw
block.hash.height(blockhash) -> /block/hash/{blockhash}/height
block.hash.pos(blockhash) -> /block/hash/{blockhash}/pos
block.hash.raw(blockhash) -> /block/hash/{blockhash}/raw
block.hash.size(blockhash) -> /block/hash/{blockhash}/size
block.hash.subsidy(blockhash) -> /block/hash/{blockhash}/subsidy
block.hash.tx(blockhash) -> /block/hash/{blockhash}/tx
block.hash.tx.count(blockhash) -> /block/hash/{blockhash}/tx/count
block.hash.verbose(blockhash) -> /block/hash/{blockhash}/verbose
block.range(idx0, idx) -> /block/range/{idx0}/{idx}
block.range.size(idx0, idx) -> /block/range/{idx0}/{idx}/size
block.range(idx0, idx, step) -> /block/range/{idx0}/{idx}/{step}
block.range.size(idx0, idx, step) -> /block/range/{idx0}/{idx}/{step}/size
block.hash(idx) -> /block/{idx}/hash
block.header(idx) -> /block/{idx}/header
block.header.raw(idx) -> /block/{idx}/header/raw
block.pos(idx) -> /block/{idx}/pos
block.raw(idx) -> /block/{idx}/raw
block.size(idx) -> /block/{idx}/size
block.subsidy(idx) -> /block/{idx}/subsidy
block.tx(idx) -> /block/{idx}/tx
block.tx.count(idx) -> /block/{idx}/tx/count
block.verbose(idx) -> /block/{idx}/verbose
chart.market(token) -> /chart/market/{token}
chart.market.candlestick(token, bin) -> /chart/market/{token}/candlestick/{bin}
chart.market.depth(token) -> /chart/market/{token}/depth
exchanges.codes() -> /exchanges/codes
mempool.sstx() -> /mempool/sstx
mempool.sstx.details() -> /mempool/sstx/details
mempool.sstx.details(N) -> /mempool/sstx/details/{N}
mempool.sstx.fees() -> /mempool/sstx/fees
mempool.sstx.fees(N) -> /mempool/sstx/fees/{N}
stake.diff() -> /stake/diff
stake.diff.b(idx) -> /stake/diff/b/{idx}
stake.diff.current() -> /stake/diff/current
stake.diff.estimates() -> /stake/diff/estimates
stake.diff.r(idx0, idx) -> /stake/diff/r/{idx0}/{idx}
stake.pool() -> /stake/pool
stake.pool.b(idx) -> /stake/pool/b/{idx}
stake.pool.b.full(idxorhash) -> /stake/pool/b/{idxorhash}/full
stake.pool.full() -> /stake/pool/full
stake.pool.r(idx0, idx) -> /stake/pool/r/{idx0}/{idx}
stake.powerless() -> /stake/powerless
stake.vote() -> /stake/vote
stake.vote.info() -> /stake/vote/info
status.happy() -> /status/happy
ticketpool.bydate(tp) -> /ticketpool/bydate/{tp}
ticketpool.charts() -> /ticketpool/charts
tx.decoded(txid) -> /tx/decoded/{txid}
tx.hex(txid) -> /tx/hex/{txid}
tx.__getattr__("in")(txid) -> /tx/{txid}/in
tx.__getattr__("in")(txid, txinoutindex) -> /tx/{txid}/in/{txinoutindex}
tx.out(txid) -> /tx/{txid}/out
tx.out(txid, txinoutindex) -> /tx/{txid}/out/{txinoutindex}
tx.tinfo(txid) -> /tx/{txid}/tinfo
tx.trimmed(txid) -> /tx/{txid}/trimmed
tx.vinfo(txid) -> /tx/{txid}/vinfo
txs.trimmed() -> /txs/trimmed