Maxximiliann
Parsing nested JSON
(Please Note: Elixir Experience Level: Beginner)
From mix.exs-
defp deps do
[
{:httpoison, "~> 1.6"},
{:poison, "~> 4.0"}
]
end
In IEX -
iex(2)> res = HTTPoison.get! ("https://api.wavesplatform.com/v0/pairs")
%HTTPoison.Response{
body: "{\"__type\":\"list\",\"data\":[{\"__type\":\"pair\",\"data\":{\"firstPrice\":0.22605,\"lastPrice\":0.183,\"low\":0.182,\"high\":0.22605,\"weightedAveragePrice\":0.199292871612085,\"volume\":732311.857444342,\"quoteVolume\":145944.532985663,\"volumeWaves\":145944.532985663,\"txsCount\":2974},\"amountAsset\":\"4LHHvYGNKJUg5hj65aGD5vgScvCBmLpdRFtjokvCjSL8\",\"priceAsset\":\"WAVES\"},{\"__type\":\"pair\",\"data\":{\"firstPrice\":0.00010967,\"lastPrice\":0.00011121,\"low\":0.0001078,\"high\":0.000113,\"weightedAveragePrice\":0.000111679201769491,\"volume\":138114.26699538,\"quoteVolume\":15.4244910910224,\"volumeWaves\":138114.26699538,\"txsCount\":2192},\"amountAsset\":\"WAVES\",\"priceAsset\":\"8LQW8f7P5d5PZM7GtZEBgaqRPGSzS3DfPuiXrURJ4AJS\"},{\"__type\":\"pair\",\"data\":{\"firstPrice\":8360,\"lastPrice\":8630.71,\"low\":8183,\"high\":8666,\"weightedAveragePrice\":8322.46563502579,\"volume\":8.95597220000001,\"quoteVolume\":74535.7708627464,\"volumeWaves\":78239.1291224059,\"txsCount\":267},\"amountAsset\":\"8LQW8f7P5d5PZM7GtZEBgaqRPGSzS3DfPuiXrURJ4AJS\",\"priceAsset\":\"Ft8X1v1LTa1ABafufpaCWyVj8KkaxUWE6xBhW6sNFJck\"},{\"__type\":\"pair\",\"data\":{\"firstPrice\":196.16698506,\"lastPrice\":197.61817326,\"low\":191.9827021,\"high\":198.35016891,\"weightedAveragePrice\":194.200358923929,\"volume\":306.50228458,\"quoteVolume\":59522.8536764403,\"volumeWaves\":59522.8536764403,\"txsCount\":1083},\"amountAsset\":\"474jTeYx2r2Va35794tCScAXWJG9hU2HcgxzMowaZUnu\",\"priceAsset\":\"WAVES\"},{\"__type\":\"pair\",\"data\":{\"firstPrice\":0.00001699,\"lastPrice\":0.00002001,\"low\":0.000012,\"high\":0.000037,\"weightedAveragePrice\":0.0000182454824214892,\"volume\":2569761604.661,\"quoteVolume\":46886.54018526,\"volumeWaves\":46886.54018526,\"txsCount\":60},\"amountAsset\":\"7x5Efh41w4k2Q2ikxHQtAa9uR91qnmGQMVkqcb2SPfde\",\"priceAsset\":\"WAVES\"},{\"__type\":\"pair\",\"data\":{\"firstPrice\":0.02134005,\"lastPrice\":0.02198548,\"low\":0.02134005,\"high\":0.0220278,\"weightedAveragePrice\":0.0217290690497021,\"volume\":185.14934025,\"quoteVolume\":4.02312279879904,\"volumeWaves\":36023.9215096012,\"txsCount\":549},\"amountAsset\":\"474jTeYx2r2Va35794tCScAXWJG9hU2HcgxzMowaZUnu\",\"priceAsset\":\"8LQW8f7P5d5PZM7GtZEBgaqRPGSzS3DfPuiXrURJ4AJS\"},{\"__type\":\"pair\",\"data\":{\"firstPrice\":0.99,\"lastPrice\":0.99999999,\"low\":0.99,\"high\":1,\"weightedAveragePrice\":0.998652039818104,\"volume\":52032.18850477,\"quoteVolume\":51962.0511864887,\"volumeWaves\":31260.1893633205,\"txsCount\":30},\"amountAsset\":\"725Yv9oceWsB4GsYwyy4A52kEwyVrL5avubkeChSnL46\",\"priceAsset\":\"5dJj4Hn9t2Ve3tRpNGirUHy4yBK6qdJRAJYV21yPPuGz\"},{\"__type\":\"pair\",\"data\":{\"firstPrice\":0.91,\"lastPrice\":0.96,\"low\":0.91,\"high\":0.97,\"weightedAveragePrice\":0.952666162044499,\"volume\":20147.36196732,\"quoteVolume\":19193.7100007281,\"volumeWaves\":20147.36196732,\"txsCount\":272},\"amountAsset\":\"WAVES\",\"priceAsset\":\"Ft8X1v1LTa1ABafufpaCWyVj8KkaxUWE6xBhW6sNFJck\"},{\"__type\":\"pair\",\"data\":{\"firstPrice\":1.00999999,\"lastPrice\":0.11999999,\"low\":0.11999999,\"high\":1.11,\"weightedAveragePrice\":1.03881808932202,\"volume\":15639.51718921,\"quoteVolume\":16246.613364414,\"volumeWaves\":16246.613364414,\"txsCount\":34},\"amountAsset\":\"3k6vM987VAEVKJdD1J9eaXB2qi48Q7iYTEct7g9DMmtv\",\"priceAsset\":\"WAVES\"},{\"__type\":\"pair\",\"data\":{\"firstPrice\":1500,\"lastPrice\":1500,\"low\":1500,\"high\":1501,\"weightedAveragePrice\":1500.01449275362,\"volume\":69,\"quoteVolume\":103501,\"volumeWaves\":14951.0923323936,\"txsCount\":69},\"amountAsset\":\"DHgwrRvVyqJsepd32YbBqUeDH4GJ1N984X8QoekjgH8J\",\"priceAsset\":\"7zoGYmqorrybHZRtrykZeshHtia176fzTuwdQq6bAjw2\"},{\"__type\":\"pair\",\"data\":{\"firstPrice\":0.00002419,\"lastPrice\":0.00002046,\"low\":0.00002002,\"high\":0.00002464,\"weightedAveragePrice\":0.0000225360286772358,\"volume\":70983.3606095201,\"quoteVolume\":1.59968305030272,\"volumeWaves\":14323.9119277062,\"txsCount\":3268},\"amountAsset\":\"4LHHvYGNKJUg5hj65aGD5vgScvCBmLpdRFtjokvCjSL8\",\"priceAsset\":\"8LQW8f7P5d5PZM7GtZEBgaqRPGSzS3DfPuiXrURJ4AJS\"},{\"__type\":\"pair\",\"data\":{\"firstPrice\":0.14638502,\"lastPrice\":0.14500003,\"low\":0.1395,\"high\":0.14967,\"weightedAveragePrice\":0.144453602693632,\"volume\":89246.9499999998,\"quoteVolume\":12892.0434569184,\"volumeWaves\":12892.0434569184,\"txsCount\":2795},\"amountAsset\":\"DHgwrRvVyqJsepd32YbBqUeDH4GJ1N984X8QoekjgH8J\",\"priceAsset\":\"WAVES\"},{\"__type\":\"pair\"," <> ...,
headers: [
{"Date", "Mon, 07 Oct 2019 20:06:35 GMT"},
{"Content-Type", "application/json; charset=utf-8"},
{"Transfer-Encoding", "chunked"},
{"Connection", "keep-alive"},
{"Set-Cookie",
"__cfduid=d9231e750fe82d310888154f4f764b65f1570478794; expires=Tue, 06-Oct-20 20:06:34 GMT; path=/; domain=.wavesplatform.com; HttpOnly"},
{"Vary", "Accept-Encoding"},
{"X-Request-Id", "cb1c8ff5-5c32-4248-b05b-c5c718b66bf4"},
{"Vary", "Origin"},
{"X-Cache-Status", "EXPIRED"},
{"Access-Control-Allow-Origin", "*"},
{"Access-Control-Allow-Credentials", "true"},
{"Access-Control-Allow-Methods", "PUT, GET, POST, OPTIONS"},
{"Access-Control-Allow-Headers",
"DNT,X-CustomHeader,Keep-Alive,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type,Authorization"},
{"Strict-Transport-Security", "max-age=15724800; includeSubDomains"},
{"CF-Cache-Status", "DYNAMIC"},
{"Expect-CT",
"max-age=604800, report-uri=\"https://report-uri.cloudflare.com/cdn-cgi/beacon/expect-ct\""},
{"Server", "cloudflare"},
{"CF-RAY", "52227f12cf6dc7bd-DEN"}
],
request: %HTTPoison.Request{
body: "",
headers: [],
method: :get,
options: [],
params: %{},
url: "https://api.wavesplatform.com/v0/pairs"
},
request_url: "https://api.wavesplatform.com/v0/pairs",
status_code: 200
}
iex(3)> res.body
"{\"__type\":\"list\",\"data\":[{\"__type\":\"pair\",\"data\":{\"firstPrice\":0.22605,\"lastPrice\":0.183,\"low\":0.182,\"high\":0.22605,\"weightedAveragePrice\":0.199292871612085,\"volume\":732311.857444342,\"quoteVolume\":145944.532985663,\"volumeWaves\":145944.532985663,\"txsCount\":2974},\"amountAsset\":\"4LHHvYGNKJUg5hj65aGD5vgScvCBmLpdRFtjokvCjSL8\",\"priceAsset\":\"WAVES\"},{\"__type\":\"pair\",\"data\":{\"firstPrice\":0.00010967,\"lastPrice\":0.00011121,\"low\":0.0001078,\"high\":0.000113,\"weightedAveragePrice\":0.000111679201769491,\"volume\":138114.26699538,\"quoteVolume\":15.4244910910224,\"volumeWaves\":138114.26699538,\"txsCount\":2192},\"amountAsset\":\"WAVES\",\"priceAsset\":\"8LQW8f7P5d5PZM7GtZEBgaqRPGSzS3DfPuiXrURJ4AJS\"},{\"__type\":\"pair\",\"data\":{\"firstPrice\":8360,\"lastPrice\":8630.71,\"low\":8183,\"high\":8666,\"weightedAveragePrice\":8322.46563502579,\"volume\":8.95597220000001,\"quoteVolume\":74535.7708627464,\"volumeWaves\":78239.1291224059,\"txsCount\":267},\"amountAsset\":\"8LQW8f7P5d5PZM7GtZEBgaqRPGSzS3DfPuiXrURJ4AJS\",\"priceAsset\":\"Ft8X1v1LTa1ABafufpaCWyVj8KkaxUWE6xBhW6sNFJck\"},{\"__type\":\"pair\",\"data\":{\"firstPrice\":196.16698506,\"lastPrice\":197.61817326,\"low\":191.9827021,\"high\":198.35016891,\"weightedAveragePrice\":194.200358923929,\"volume\":306.50228458,\"quoteVolume\":59522.8536764403,\"volumeWaves\":59522.8536764403,\"txsCount\":1083},\"amountAsset\":\"474jTeYx2r2Va35794tCScAXWJG9hU2HcgxzMowaZUnu\",\"priceAsset\":\"WAVES\"},{\"__type\":\"pair\",\"data\":{\"firstPrice\":0.00001699,\"lastPrice\":0.00002001,\"low\":0.000012,\"high\":0.000037,\"weightedAveragePrice\":0.0000182454824214892,\"volume\":2569761604.661,\"quoteVolume\":46886.54018526,\"volumeWaves\":46886.54018526,\"txsCount\":60},\"amountAsset\":\"7x5Efh41w4k2Q2ikxHQtAa9uR91qnmGQMVkqcb2SPfde\",\"priceAsset\":\"WAVES\"},{\"__type\":\"pair\",\"data\":{\"firstPrice\":0.02134005,\"lastPrice\":0.02198548,\"low\":0.02134005,\"high\":0.0220278,\"weightedAveragePrice\":0.0217290690497021,\"volume\":185.14934025,\"quoteVolume\":4.02312279879904,\"volumeWaves\":36023.9215096012,\"txsCount\":549},\"amountAsset\":\"474jTeYx2r2Va35794tCScAXWJG9hU2HcgxzMowaZUnu\",\"priceAsset\":\"8LQW8f7P5d5PZM7GtZEBgaqRPGSzS3DfPuiXrURJ4AJS\"},{\"__type\":\"pair\",\"data\":{\"firstPrice\":0.99,\"lastPrice\":0.99999999,\"low\":0.99,\"high\":1,\"weightedAveragePrice\":0.998652039818104,\"volume\":52032.18850477,\"quoteVolume\":51962.0511864887,\"volumeWaves\":31260.1893633205,\"txsCount\":30},\"amountAsset\":\"725Yv9oceWsB4GsYwyy4A52kEwyVrL5avubkeChSnL46\",\"priceAsset\":\"5dJj4Hn9t2Ve3tRpNGirUHy4yBK6qdJRAJYV21yPPuGz\"},{\"__type\":\"pair\",\"data\":{\"firstPrice\":0.91,\"lastPrice\":0.96,\"low\":0.91,\"high\":0.97,\"weightedAveragePrice\":0.952666162044499,\"volume\":20147.36196732,\"quoteVolume\":19193.7100007281,\"volumeWaves\":20147.36196732,\"txsCount\":272},\"amountAsset\":\"WAVES\",\"priceAsset\":\"Ft8X1v1LTa1ABafufpaCWyVj8KkaxUWE6xBhW6sNFJck\"},{\"__type\":\"pair\",\"data\":{\"firstPrice\":1.00999999,\"lastPrice\":0.11999999,\"low\":0.11999999,\"high\":1.11,\"weightedAveragePrice\":1.03881808932202,\"volume\":15639.51718921,\"quoteVolume\":16246.613364414,\"volumeWaves\":16246.613364414,\"txsCount\":34},\"amountAsset\":\"3k6vM987VAEVKJdD1J9eaXB2qi48Q7iYTEct7g9DMmtv\",\"priceAsset\":\"WAVES\"},{\"__type\":\"pair\",\"data\":{\"firstPrice\":1500,\"lastPrice\":1500,\"low\":1500,\"high\":1501,\"weightedAveragePrice\":1500.01449275362,\"volume\":69,\"quoteVolume\":103501,\"volumeWaves\":14951.0923323936,\"txsCount\":69},\"amountAsset\":\"DHgwrRvVyqJsepd32YbBqUeDH4GJ1N984X8QoekjgH8J\",\"priceAsset\":\"7zoGYmqorrybHZRtrykZeshHtia176fzTuwdQq6bAjw2\"},{\"__type\":\"pair\",\"data\":{\"firstPrice\":0.00002419,\"lastPrice\":0.00002046,\"low\":0.00002002,\"high\":0.00002464,\"weightedAveragePrice\":0.0000225360286772358,\"volume\":70983.3606095201,\"quoteVolume\":1.59968305030272,\"volumeWaves\":14323.9119277062,\"txsCount\":3268},\"amountAsset\":\"4LHHvYGNKJUg5hj65aGD5vgScvCBmLpdRFtjokvCjSL8\",\"priceAsset\":\"8LQW8f7P5d5PZM7GtZEBgaqRPGSzS3DfPuiXrURJ4AJS\"},{\"__type\":\"pair\",\"data\":{\"firstPrice\":0.14638502,\"lastPrice\":0.14500003,\"low\":0.1395,\"high\":0.14967,\"weightedAveragePrice\":0.144453602693632,\"volume\":89246.9499999998,\"quoteVolume\":12892.0434569184,\"volumeWaves\":12892.0434569184,\"txsCount\":2795},\"amountAsset\":\"DHgwrRvVyqJsepd32YbBqUeDH4GJ1N984X8QoekjgH8J\",\"priceAsset\":\"WAVES\"},{\"__type\":\"pair\"," <> ...
iex(4)> body = Poison.decode! res.body, keys: :atoms
%{
__type: "list",
data: [
%{
__type: "pair",
amountAsset: "4LHHvYGNKJUg5hj65aGD5vgScvCBmLpdRFtjokvCjSL8",
data: %{
firstPrice: 0.22605,
high: 0.22605,
lastPrice: 0.183,
low: 0.182,
quoteVolume: 145944.532985663,
txsCount: 2974,
volume: 732311.857444342,
volumeWaves: 145944.532985663,
weightedAveragePrice: 0.199292871612085
},
priceAsset: "WAVES"
},
%{
__type: "pair",
amountAsset: "WAVES",
data: %{
firstPrice: 1.0967e-4,
high: 1.13e-4,
lastPrice: 1.1121e-4,
low: 1.078e-4,
quoteVolume: 15.4244910910224,
txsCount: 2192,
volume: 138114.26699538,
volumeWaves: 138114.26699538,
weightedAveragePrice: 1.11679201769491e-4
},
priceAsset: "8LQW8f7P5d5PZM7GtZEBgaqRPGSzS3DfPuiXrURJ4AJS"
},
%{
__type: "pair",
amountAsset: "8LQW8f7P5d5PZM7GtZEBgaqRPGSzS3DfPuiXrURJ4AJS",
data: %{
firstPrice: 8360,
high: 8666,
lastPrice: 8630.71,
low: 8183,
quoteVolume: 74535.7708627464,
txsCount: 267,
volume: 8.95597220000001,
volumeWaves: 78239.1291224059,
weightedAveragePrice: 8322.46563502579
},
priceAsset: "Ft8X1v1LTa1ABafufpaCWyVj8KkaxUWE6xBhW6sNFJck"
},
%{
__type: "pair",
amountAsset: "474jTeYx2r2Va35794tCScAXWJG9hU2HcgxzMowaZUnu",
data: %{
firstPrice: 196.16698506,
high: 198.35016891,
lastPrice: 197.61817326,
low: 191.9827021,
quoteVolume: 59522.8536764403,
txsCount: 1083,
volume: 306.50228458,
volumeWaves: 59522.8536764403,
weightedAveragePrice: 194.200358923929
},
priceAsset: "WAVES"
},
%{
__type: "pair",
amountAsset: "7x5Efh41w4k2Q2ikxHQtAa9uR91qnmGQMVkqcb2SPfde",
data: %{
firstPrice: 1.699e-5,
high: 3.7e-5,
lastPrice: 2.001e-5,
low: 1.2e-5,
quoteVolume: 46886.54018526,
txsCount: 60,
volume: 2569761604.661,
volumeWaves: 46886.54018526,
weightedAveragePrice: 1.82454824214892e-5
},
priceAsset: "WAVES"
},
%{
__type: "pair",
amountAsset: "474jTeYx2r2Va35794tCScAXWJG9hU2HcgxzMowaZUnu",
data: %{
firstPrice: 0.02134005,
high: 0.0220278,
lastPrice: 0.02198548,
low: 0.02134005,
quoteVolume: 4.02312279879904,
txsCount: 549,
volume: 185.14934025,
volumeWaves: 36023.9215096012,
weightedAveragePrice: 0.0217290690497021
},
priceAsset: "8LQW8f7P5d5PZM7GtZEBgaqRPGSzS3DfPuiXrURJ4AJS"
},
%{
__type: "pair",
amountAsset: "725Yv9oceWsB4GsYwyy4A52kEwyVrL5avubkeChSnL46",
data: %{
firstPrice: 0.99,
high: 1,
lastPrice: 0.99999999,
low: 0.99,
quoteVolume: 51962.0511864887,
txsCount: 30,
volume: 52032.18850477,
volumeWaves: 31260.1893633205,
weightedAveragePrice: 0.998652039818104
},
priceAsset: "5dJj4Hn9t2Ve3tRpNGirUHy4yBK6qdJRAJYV21yPPuGz"
},
%{
__type: "pair",
amountAsset: "WAVES",
data: %{
firstPrice: 0.91,
high: 0.97,
lastPrice: 0.96,
low: 0.91,
quoteVolume: 19193.7100007281,
txsCount: 272,
volume: 20147.36196732,
volumeWaves: 20147.36196732,
weightedAveragePrice: 0.952666162044499
},
priceAsset: "Ft8X1v1LTa1ABafufpaCWyVj8KkaxUWE6xBhW6sNFJck"
},
%{
__type: "pair",
amountAsset: "3k6vM987VAEVKJdD1J9eaXB2qi48Q7iYTEct7g9DMmtv",
data: %{
firstPrice: 1.00999999,
high: 1.11,
lastPrice: 0.11999999,
low: 0.11999999,
quoteVolume: 16246.613364414,
txsCount: 34,
volume: 15639.51718921,
volumeWaves: 16246.613364414,
weightedAveragePrice: 1.03881808932202
},
priceAsset: "WAVES"
},
%{
__type: "pair",
amountAsset: "DHgwrRvVyqJsepd32YbBqUeDH4GJ1N984X8QoekjgH8J",
data: %{
firstPrice: 1500,
high: 1501,
lastPrice: 1500,
low: 1500,
quoteVolume: 103501,
txsCount: 69,
volume: 69,
volumeWaves: 14951.0923323936,
weightedAveragePrice: 1500.01449275362
},
priceAsset: "7zoGYmqorrybHZRtrykZeshHtia176fzTuwdQq6bAjw2"
},
%{
__type: "pair",
amountAsset: "4LHHvYGNKJUg5hj65aGD5vgScvCBmLpdRFtjokvCjSL8",
data: %{
firstPrice: 2.419e-5,
high: 2.464e-5,
lastPrice: 2.046e-5,
low: 2.002e-5,
quoteVolume: 1.59968305030272,
txsCount: 3268,
volume: 70983.3606095201,
volumeWaves: 14323.9119277062,
weightedAveragePrice: 2.25360286772358e-5
},
priceAsset: "8LQW8f7P5d5PZM7GtZEBgaqRPGSzS3DfPuiXrURJ4AJS"
},
%{
__type: "pair",
amountAsset: "DHgwrRvVyqJsepd32YbBqUeDH4GJ1N984X8QoekjgH8J",
data: %{
firstPrice: 0.14638502,
high: 0.14967,
lastPrice: 0.14500003,
low: 0.1395,
quoteVolume: 12892.0434569184,
txsCount: 2795,
volume: 89246.9499999998,
volumeWaves: 12892.0434569184,
weightedAveragePrice: 0.144453602693632
},
priceAsset: "WAVES"
},
%{
__type: "pair",
amountAsset: "3QvxP6YFBKpWJSMAfYtL8Niv8KmmKsnpb9uQwQpg8QN2",
data: %{
firstPrice: 0.14161615,
high: 0.18650499,
lastPrice: 0.13733208,
low: 0.10000005,
quoteVolume: 9284.31574452678,
txsCount: 5674,
volume: 71306.6199999999,
volumeWaves: 9284.31574452678,
weightedAveragePrice: 0.13020271812809
},
priceAsset: "WAVES"
},
%{
__type: "pair",
amountAsset: "WAVES",
data: %{
firstPrice: 0.86,
high: 0.89,
lastPrice: 0.89,
low: 0.86,
quoteVolume: 6152.0900002064,
txsCount: 74,
volume: 6965.50440782,
volumeWaves: 6965.50440782,
weightedAveragePrice: 0.883222468899682
},
priceAsset: "Gtb1WRznfchDnTh37ezoDTJ4wcoKaRsKqKjJjy7nm2zU"
},
%{
__type: "pair",
amountAsset: "5WvPKSJXzVE2orvbkJ8wsQmmQKqTv9sGBPksV4adViw3",
data: %{
firstPrice: 0.00695209,
high: 0.00701179,
lastPrice: 0.00692253,
low: 0.0069058,
quoteVolume: 0.744231823127807,
txsCount: 91,
volume: 106.91282378,
volumeWaves: 6664.01452854153,
weightedAveragePrice: 0.00696110903084227
},
priceAsset: "8LQW8f7P5d5PZM7GtZEBgaqRPGSzS3DfPuiXrURJ4AJS"
},
%{
__type: "pair",
amountAsset: "7uncmN7dZfV3fYVvNdYTngrrbamPYMgwpDnYG1bGy6nA",
data: %{
firstPrice: 6.5e-7,
high: 1.45e-6,
lastPrice: 4.5e-7,
low: 4.0e-7,
quoteVolume: 6443.91190275,
txsCount: 65,
volume: 10168871041,
volumeWaves: 6443.91190275,
weightedAveragePrice: 6.3369000125665e-7
},
priceAsset: "WAVES"
},
%{
__type: "pair",
amountAsset: "8LQW8f7P5d5PZM7GtZEBgaqRPGSzS3DfPuiXrURJ4AJS",
data: %{
firstPrice: 7598.19,
high: 7990.56,
lastPrice: 7970,
low: 7350.47,
quoteVolume: 3931.341608943,
txsCount: 50,
volume: 0.52597517,
volumeWaves: 4451.13405441402,
weightedAveragePrice: 7474.38630789929
},
priceAsset: "Gtb1WRznfchDnTh37ezoDTJ4wcoKaRsKqKjJjy7nm2zU"
},
%{
__type: "pair",
amountAsset: "HZk1mbfuJpmxU1Fs4AX5MWLVYtctsNcg6e2C6VKqK8zk",
data: %{
firstPrice: 62.79331273,
high: 64,
lastPrice: 63.29769846,
low: 61.50326477,
quoteVolume: 3998.40475546229,
txsCount: 173,
volume: 63.91732683,
volumeWaves: 3998.40475546229,
weightedAveragePrice: 62.5558820082822
},
priceAsset: "WAVES"
},
%{
__type: "pair",
amountAsset: "EYz8Zvs62D4d7F5ZgXHCWuzuFaZg63FYnfVQrTWQoLSK",
data: %{
firstPrice: 0.576495,
high: 0.5825,
lastPrice: 0.57099225,
low: 0.5707614,
quoteVolume: 3174.90322621713,
txsCount: 524,
volume: 5506.2269,
volumeWaves: 3174.90322621713,
weightedAveragePrice: 0.576602323855765
},
priceAsset: "WAVES"
},
%{
__type: "pair",
amountAsset: "B3uGHFRpSUuGEDWjqB9LWWxafQj8VTvpMucEyoxzws5H",
data: %{
firstPrice: 0.00868693,
high: 0.00884691,
lastPrice: 0.00869817,
low: 0.00866753,
quoteVolume: 0.34547501345214,
txsCount: 95,
volume: 39.60940106,
volumeWaves: 3093.45883547065,
weightedAveragePrice: 0.00872204588321892
},
priceAsset: "8LQW8f7P5d5PZM7GtZEBgaqRPGSzS3DfPuiXrURJ4AJS"
},
%{
__type: "pair",
amountAsset: "GSFvcF6ycBfXwPJLLKMExRsHWnvVdZQFHtGiYu4A2kZP",
data: %{
firstPrice: 16,
high: 17,
lastPrice: 17,
low: 16,
quoteVolume: 24800,
txsCount: 2,
volume: 1500,
volumeWaves: 2864.4,
weightedAveragePrice: 16.5333333333333
},
priceAsset: "5f1txDysSx2fVDjgXMdNpuprpdgXKjoHPtebL3SrMGzE"
},
%{
__type: "pair",
amountAsset: "GSFvcF6ycBfXwPJLLKMExRsHWnvVdZQFHtGiYu4A2kZP",
data: %{
firstPrice: 9.3,
high: 9.4,
lastPrice: 9.4,
low: 9.3,
quoteVolume: 22577.5,
txsCount: 2,
volume: 2425,
volumeWaves: 2607.70125,
weightedAveragePrice: 9.31030927835052
},
priceAsset: "FP2rjWYBQfqBpdLCDBaZvCtzikMozEyDbxsKyaWA76oB"
},
%{
__type: "pair",
amountAsset: "474jTeYx2r2Va35794tCScAXWJG9hU2HcgxzMowaZUnu",
data: %{
firstPrice: 180,
high: 189,
lastPrice: 189,
low: 180,
quoteVolume: 2449.820040127,
txsCount: 44,
volume: 13.15984533,
volumeWaves: 2571.54094239003,
weightedAveragePrice: 186.158725934433
},
priceAsset: "Ft8X1v1LTa1ABafufpaCWyVj8KkaxUWE6xBhW6sNFJck"
},
%{
__type: "pair",
amountAsset: "EYz8Zvs62D4d7F5ZgXHCWuzuFaZg63FYnfVQrTWQoLSK",
data: %{
firstPrice: 6.299e-5,
high: 6.56e-5,
lastPrice: 6.439e-5,
low: 6.264e-5,
quoteVolume: 0.263133663575,
txsCount: 132,
volume: 4088.603,
volumeWaves: 2356.15637832115,
weightedAveragePrice: 6.43578414375277e-5
},
priceAsset: "8LQW8f7P5d5PZM7GtZEBgaqRPGSzS3DfPuiXrURJ4AJS"
},
%{
__type: "pair",
amountAsset: "HZk1mbfuJpmxU1Fs4AX5MWLVYtctsNcg6e2C6VKqK8zk",
data: %{
firstPrice: 0.00684655,
high: 0.00709932,
lastPrice: 0.00709932,
low: 0.00684655,
quoteVolume: 0.200204842927297,
txsCount: 81,
volume: 28.7176871,
volumeWaves: 1792.67795395356,
weightedAveragePrice: 0.00697148214722687
},
priceAsset: "8LQW8f7P5d5PZM7GtZEBgaqRPGSzS3DfPuiXrURJ4AJS"
},
%{
__type: "pair",
amountAsset: "BrjUWjndUanm5VsJkbUip8VRYy6LWJePtxya3FNv4TQa",
data: %{
firstPrice: 0.00450193,
high: 0.00462602,
lastPrice: 0.00459854,
low: 0.00449978,
quoteVolume: 0.162220171380536,
txsCount: 59,
volume: 35.38505513,
volumeWaves: 1452.55489661686,
weightedAveragePrice: 0.00458442613087815
},
priceAsset: "8LQW8f7P5d5PZM7GtZEBgaqRPGSzS3DfPuiXrURJ4AJS"
},
%{
__type: "pair",
amountAsset: "zMFqXuoyrn5w17PFurTqxB7GsS71fp9dfk6XFwxbPCy",
data: %{
firstPrice: 0.0246938,
high: 0.0289,
lastPrice: 0.02863482,
low: 0.0246938,
quoteVolume: 0.114129001132226,
txsCount: 79,
volume: 3.9819744,
volumeWaves: 1021.93603933337,
weightedAveragePrice: 0.028661410061357
},
priceAsset: "8LQW8f7P5d5PZM7GtZEBgaqRPGSzS3DfPuiXrURJ4AJS"
},
%{
__type: "pair",
amountAsset: "5b3UGNZXX5srkHUQWnEWEiaVtnNWmg5aLo5uZMdjWupH",
data: %{
firstPrice: 63.505,
high: 63.505,
lastPrice: 63.505,
low: 63.505,
quoteVolume: 930.52504855505,
txsCount: 20,
volume: 14.65278401,
volumeWaves: 930.52504855505,
weightedAveragePrice: 63.505
},
priceAsset: "WAVES"
},
%{
__type: "pair",
amountAsset: "4uK8i4ThRGbehENwa6MxyLtxAjAo1Rj9fduborGExarC",
data: %{
firstPrice: 0.01,
high: 0.0123999,
lastPrice: 0.00995306,
low: 0.00983301,
quoteVolume: 772.4827540199,
txsCount: 158,
volume: 76900.97,
volumeWaves: 772.4827540199,
weightedAveragePrice: 0.0100451626815618
},
priceAsset: "WAVES"
},
%{
__type: "pair",
amountAsset: "B3uGHFRpSUuGEDWjqB9LWWxafQj8VTvpMucEyoxzws5H",
data: %{
firstPrice: 79.43395902,
high: 79.91894041,
lastPrice: 78.06775212,
low: 77.68111011,
quoteVolume: 757.46507706448,
txsCount: 75,
volume: 9.63988277,
volumeWaves: 757.46507706448,
weightedAveragePrice: 78.5761710113079
},
priceAsset: "WAVES"
},
%{
__type: "pair",
amountAsset: "5dJj4Hn9t2Ve3tRpNGirUHy4yBK6qdJRAJYV21yPPuGz",
data: %{
firstPrice: 9.199e-5,
high: 9.2e-5,
lastPrice: 6.509e-5,
low: 5.807e-5,
quoteVolume: 0.0826308301517678,
txsCount: 492,
volume: 1249.20731894,
volumeWaves: 739.894526845925,
weightedAveragePrice: 6.61466106537731e-5
},
priceAsset: "8LQW8f7P5d5PZM7GtZEBgaqRPGSzS3DfPuiXrURJ4AJS"
},
%{
__type: "pair",
amountAsset: "zMFqXuoyrn5w17PFurTqxB7GsS71fp9dfk6XFwxbPCy",
data: %{
firstPrice: 252.12162161,
high: 260.06813169,
lastPrice: 256.62477782,
low: 250.81545975,
quoteVolume: 683.076959826616,
txsCount: 70,
volume: 2.66364912,
volumeWaves: 683.076959826616,
weightedAveragePrice: 256.44404688956
},
priceAsset: "WAVES"
},
%{
__type: "pair",
amountAsset: "BrjUWjndUanm5VsJkbUip8VRYy6LWJePtxya3FNv4TQa",
data: %{
firstPrice: 41.14304029,
high: 41.4438984,
lastPrice: 41.23528168,
low: 40.45042107,
quoteVolume: 625.035763618644,
txsCount: 58,
volume: 15.21948921,
volumeWaves: 625.035763618644,
weightedAveragePrice: 41.068117004082
},
priceAsset: "WAVES"
},
%{
__type: "pair",
amountAsset: "5WvPKSJXzVE2orvbkJ8wsQmmQKqTv9sGBPksV4adViw3",
data: %{
firstPrice: 63.35455619,
high: 63.35455619,
lastPrice: 62.13727713,
low: 61.03366403,
quoteVolume: 538.271381363297,
txsCount: 61,
volume: 8.62395678,
volumeWaves: 538.271381363297,
weightedAveragePrice: 62.4158254841459
},
priceAsset: "WAVES"
},
%{
__type: "pair",
amountAsset: "9jJq1tKm5J1bP4V4BBED1KnaYRmGUmTRndXVR9NkE3vY",
data: %{
firstPrice: 1.0e-8,
high: 8.0e-8,
lastPrice: 5.0e-8,
low: 1.0e-8,
quoteVolume: 530.91733368,
txsCount: 35,
volume: 12539522439,
volumeWaves: 530.91733368,
weightedAveragePrice: 4.23395178135938e-8
},
priceAsset: "WAVES"
},
%{
__type: "pair",
amountAsset: "EbLVSrAi6vS3AkLwBinzZCvAXP2yYiFJEzj1MBVHcwZ5",
data: %{
firstPrice: 4.5e-6,
high: 4.55e-6,
lastPrice: 4.53e-6,
low: 4.3e-6,
quoteVolume: 0.0575634900004158,
txsCount: 32,
volume: 12910.00041221,
volumeWaves: 515.43608020434,
weightedAveragePrice: 4.45882944712949e-6
},
priceAsset: "8LQW8f7P5d5PZM7GtZEBgaqRPGSzS3DfPuiXrURJ4AJS"
},
%{
__type: "pair",
amountAsset: "EFmBdhoQDy2vkpkC2am33ANwxBFLGeJwAmWGvJeVmWmE",
data: %{
firstPrice: 0.01,
high: 0.01,
lastPrice: 0.01,
low: 0.01,
quoteVolume: 432.58,
txsCount: 5,
volume: 43258,
volumeWaves: 454.073018686471,
...
},
priceAsset: "Ft8X1v1LTa1ABafufpaCWyVj8KkaxUWE6xBhW6sNFJck"
},
%{
__type: "pair",
amountAsset: "51LxAtwBXapvvTFSbbh4nLyWFxH6x8ocfNvrXxbTChze",
data: %{
firstPrice: 9.7999e-4,
high: 9.8997e-4,
lastPrice: 8.1999e-4,
low: 0.0008,
quoteVolume: 445.264776097594,
txsCount: 70,
volume: 520269.648299,
...
},
priceAsset: "WAVES"
},
%{
__type: "pair",
amountAsset: "AgPZuyURTDCT5KGypZjAzKbReiHdKqLWzmUHaHvsYgEJ",
data: %{
firstPrice: 1,
high: 1,
lastPrice: 1,
low: 1,
quoteVolume: 445,
txsCount: 89,
...
},
priceAsset: "WAVES"
},
%{
__type: "pair",
amountAsset: "C9GgiMrWxJpNVR1itPhy834DePjyPtUEv3ERw9qHx7KV",
data: %{
firstPrice: 0.0052,
high: 0.0075,
lastPrice: 0.0075,
low: 0.0052,
quoteVolume: 366.733936640136,
...
},
priceAsset: "WAVES"
},
%{
__type: "pair",
amountAsset: "Gtb1WRznfchDnTh37ezoDTJ4wcoKaRsKqKjJjy7nm2zU",
data: %{firstPrice: 1.06, high: 1.1, lastPrice: 1.07, low: 1.06, ...},
priceAsset: "Ft8X1v1LTa1ABafufpaCWyVj8KkaxUWE6xBhW6sNFJck"
},
%{
__type: "pair",
amountAsset: "DbngchPv6y1an7TQHQPEQ3uMj5ms5Qd46QVTgbgZ6ht3",
data: %{firstPrice: 5.0e-8, high: 7.0e-8, lastPrice: 7.0e-8, ...},
priceAsset: "WAVES"
},
%{
__type: "pair",
amountAsset: "291eANuyaSj9NiZTkMTXhktUudhFuYvR714BfqrshAWa",
data: %{firstPrice: 0.93110333, high: 0.9511155, ...},
priceAsset: "WAVES"
},
%{
__type: "pair",
amountAsset: "62LyMjcr2DtiyF5yVXFhoQ2q414VPPJXjsNYp72SuDCH",
data: %{firstPrice: 0.01033244, ...},
priceAsset: "8LQW8f7P5d5PZM7GtZEBgaqRPGSzS3DfPuiXrURJ4AJS"
},
%{
__type: "pair",
amountAsset: "2AvD9e9XxWaX1R7haCXKEWVEs6wkHpzWP4BCygRg9Q1E",
data: %{...},
...
},
%{__type: "pair", amountAsset: "WAVES", ...},
%{__type: "pair", ...},
%{...},
...
]
}
How would I go about extracting amountAsset, priceAsset, volumeWaves, lastPrice for all pairs where volumeWaves >= 500 as quickly as possible?
Thanks in advance for all your input! 
Marked As Solved
pdgonzalez872
Hi @Maxximiliann! Since you said your were starting out, I decided to show you a couple of things about Elixir! Hopefully this helps you in your journey.
I created a repo here: https://github.com/pdgonzalez872/maxximiliann that has an acceptance_test file. There, I show a couple of things about your problem, how to use some tools to your advantage (tests, pry) and ultimately help you with your question. For completeness, I added the content of the file below. Please read the code and hopefully this helps you in your journey.
PD
defmodule AcceptanceTest do
use ExUnit.Case
test "should work" do
# Since you mentioned you are starting out, here are a couple of things you
# may not know. If you do, disregard them.
# You can use `require IEx; IEx.pry` to start a debugging session within a test.
# You can then run the tests like so: `iex -S mix test`
# more about Pry here: https://medium.com/@diamondgfx/debugging-phoenix-with-iex-pry-5417256e1d11
# Uncomment line 20 below to allow pry to run in this test and when the
# debugger asks you if you want to "Allow" Pry, press "Y" to jump in the
# session. It is an IEx session, but through tests. Helpful to debug things
# that you need to go back to later. If you need more than 60 seconds in
# your debugging session (very common), pass the `trace` flag to the mix
# command like so: `iex -S mix test --trace` to make the test have a
# timeout of `infinity`.
# require IEx; IEx.pry
# I'm going to use the code you posted to keep things the same. Apples to
# apples. :)
res = HTTPoison.get!("https://api.wavesplatform.com/v0/pairs")
body = Poison.decode!(res.body, keys: :atoms)
# `body` is a `map` with the following keys:
# We prove this by having the assertion below pass. If the keys were not
# the same, this test would fail.
assert Map.keys(body) == [:__type, :data]
# we can see that `body.data` is a `list`:
assert is_list(body.data) == true
# you can also write the same thing above like this:
assert is_list(body.data)
# This is what the first element in your collection looks like:
first_element = Enum.at(body.data, 0)
# Using IO.inspect() is a great way to look at the shape your data has:
msg = "This will print out to the terminal when you run the test, this is what first_element looks like"
IO.inspect(first_element, label: msg)
# These are the keys you have in `first_element`
assert Map.keys(first_element) == [:__type, :amountAsset, :data, :priceAsset]
# You mentioned you wanted `volumeWaves` for each element. You can see that
# you don't have that key in that first map.
# This is what you have inside `data`:
assert Map.keys(first_element.data) == [:firstPrice, :high, :lastPrice, :low, :quoteVolume, :txsCount, :volume,
:volumeWaves, :weightedAveragePrice]
# There is a little hiccup with your data, you are getting floats back from
# your api call, which is fine, but I suggest using a library when
# dealing with float values. A great one is this one:
# https://github.com/ericmj/decimal
# Here is proof you have a float:
assert is_float(first_element.data.firstPrice)
# To answer your original question: When dealing with collections
# (enumerables), look at the functions in `Enum`:
# https://github.com/elixir-lang/elixir/blob/master/lib/elixir/lib/enum.ex
# Here is `map/2`. The number by the function name is the number of
# arguments it takes (called arity). `Map` iterates through the enumerable
# you pass and keeps the result of a function you pass in as a second
# argument:
all_volume_waves_prices = Enum.map(body.data, fn element -> element.data.volumeWaves end)
IO.inspect(all_volume_waves_prices)
# To answer your question, we can also filter enumerables: `Enum.filter/2`
# will return the element that returns `true` in the function you pass in
# as a second argument:
volume_waves_greater_than_500 = Enum.filter(body.data, fn element -> element.data.volumeWaves > 500.0 end)
IO.inspect(volume_waves_greater_than_500)
# Hope this helps. Thanks for asking the question and I hope you keep using Elixir.
end
end
On a side note, here is a guide to markdown: Basic Syntax | Markdown Guide. It’s nice to be able to format things in these forums, helps you get your point across faster.
9
Also Liked
kokolegorille
BTW there is a missing attribute in your code. To make it work You need to add a missing data, like this. (data is an internal struct of pair)
iex> body.data |> Enum.filter(fn pair -> pair.data.volumeWaves >= 500 end)
3
Maxximiliann
kokolegorille
We all started as beginner
But You are true, Elixir errors are often self explanatory…
except dialyzer messages
1
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