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#V2
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help
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l eth_getter artifacts/ether_price_getter.wasm
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l curl_adapter artifacts/curl_adapter.wasm
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interface
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call ether_price_getter ["042baa7d-2e2a-4664-b767-5bdc7988c572", "GBP"]
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call ether_price_getter ether_price_getter ["042baa7d-2e2a-4664-b767-5bdc7988c572", "GBP"]
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call ether_price_getter ether_price_getter ["42fc4b0e-59cf-4182-8f22-d4095cf0a738", "GBP"]
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call ether_price_getter ether_price_getter ["42fc4b0e-59cf-4182-8f22-d4095cf0a738", "USD"]
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call ether_price_getter ether_price_getter ["42fc4b0e-59cf-4182-8f22-d4095cf0a738", "GBP"]
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call ether_price_getter ether_price_getter ["42fc4b0e-59cf-4182-8f22-d4095cf0a738", "USD"]
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call ether_price_getter ether_price_getter ["42fc4b0e-59cf-4182-8f22-d4095cf0a738", "GBP"]
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call ether_price_getter ether_price_getter ["42fc4b0e-59cf-4182-8f22-d4095cf0a738", "EUR"]
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interface
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call ether_price_getter ether_price_getter ["42fc4b0e-59cf-4182-8f22-d4095cf0a738", "EUR"]
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inte
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interface
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call ether_price_getter ether_price_getter ["42fc4b0e-59cf-4182-8f22-d4095cf0a738", "GBP"]
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interface
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# Ether Price Quotation Service
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## Overview
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This module utilizes curl and the Coinbase API to allow the query of the latest Ether (ETH) price relative to some 120 currencies. The service requires a valid Coinmarketcap API key, which is freely available with [registration](). The query function wraps this API call: https://coinmarketcap.com/api/documentation/v1/#operation/getV2CryptocurrencyQuotesLatest:
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```bash
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ether_price_getter(api_key: String, currency_symbol: String)
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```
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which expects the Coinmarketcap API key and the three letter currency symbol, e.g.:
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```
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call ether_price_getter ether_price_getter ["32fd4c0f-59cf-4182-8f22-d4083df0a738", "EUR"]
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```
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Please note that you need to supply a valid Coinmarketcap API key and that the free account limits the
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number of conversions to one. The result from the Fluence service call is the raw json string, e.g.:
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```
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result: String("{\"status\":{\"timestamp\":\"2021-02-22T20:47:59.960Z\",\"error_code\":0,\"error_message\":null,\"elapsed\":225,\"credit_count\":1,\"notice\":null},\"data\":{\"ETH\":{\"id\":1027,\"name\":\"Ethereum\",\"symbol\":\"ETH\",\"slug\":\"ethereum\",\"num_market_pairs\":5986,\"date_added\":\"2015-08-07T00:00:00.000Z\",\"tags\":[\"mineable\",\"pow\",\"smart-contracts\",\"coinbase-ventures-portfolio\",\"three-arrows-capital-portfolio\",\"polychain-capital-portfolio\"],\"max_supply\":null,\"circulating_supply\":114779907.124,\"total_supply\":114779907.124,\"is_active\":1,\"platform\":null,\"cmc_rank\":2,\"is_fiat\":0,\"last_updated\":\"2021-02-22T20:46:06.000Z\",\"quote\":{\"EUR\":{\"price\":1464.4187545109621,\"volume_24h\":34069036322.326084,\"percent_change_1h\":3.41360427,\"percent_change_24h\":-10.32669439,\"percent_change_7d\":-3.70439114,\"percent_change_30d\":41.39754247,\"market_cap\":168085848633.412,\"last_updated\":\"2021-02-22T20:47:05.000Z\"}}}}}")
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```
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## Where to Find The Service
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The service is discoverable at [Fluence](https://dash.fluence.dev/) and ready for use.
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## How to Build The Service
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machine setup instructions
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In the `eth-price-getter` dir,
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```bash
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# if needed
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chmod +x .build.sh
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./build.sh
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```
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That compiles both the curl and the price getter code and places the resulting wasm code into the `artifacts` dir. For local testing run `fce-repl Config.toml` to initiate the repl:
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```bash
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mbp16~/localdev/ethdenver-hackathon/ether-price-getter(eth-price-getter|…) % fce-repl Config.toml
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Welcome to the FCE REPL (version 0.1.33)
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app service was created with service id = b0cc4d0d-fb3e-49e1-8532-54d77e03cdaa
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elapsed time 82.757883ms
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1> interface
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Loaded modules interface:
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curl_adapter:
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fn curl_request(url: String) -> String
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ether_price_getter:
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fn ether_price_getter(api_key: String, currency_symbol: String) -> String
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2> call ether_price_getter ether_price_getter ["35fd4b0e-56cf-4182-8f22-d4095cf0a738", "EUR"]
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INFO: Running "/usr/bin/curl -H X-CMC_PRO_API_KEY: 35fd4b0e-56cf-4182-8f22-d4095cf0a738 -H Accept: application/json -d symbol=ETH&convert=EUR -G https://pro-api.coinmarketcap.com/v1/cryptocurrency/quotes/latest" ...
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% Total % Received % Xferd Average Speed Time Time Time Current
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Dload Upload Total Spent Left Speed
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100 868 0 868 0 0 2755 0 --:--:-- --:--:-- --:--:-- 2755
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result: String("{\"status\":{\"timestamp\":\"2021-02-22T21:06:42.598Z\",\"error_code\":0,\"error_message\":null,\"elapsed\":18,\"credit_count\":1,\"notice\":null},\"data\":{\"ETH\":{\"id\":1027,\"name\":\"Ethereum\",\"symbol\":\"ETH\",\"slug\":\"ethereum\",\"num_market_pairs\":5986,\"date_added\":\"2015-08-07T00:00:00.000Z\",\"tags\":[\"mineable\",\"pow\",\"smart-contracts\",\"coinbase-ventures-portfolio\",\"three-arrows-capital-portfolio\",\"polychain-capital-portfolio\"],\"max_supply\":null,\"circulating_supply\":114779907.124,\"total_supply\":114779907.124,\"is_active\":1,\"platform\":null,\"cmc_rank\":2,\"is_fiat\":0,\"last_updated\":\"2021-02-22T21:05:03.000Z\",\"quote\":{\"EUR\":{\"price\":1459.5551152082585,\"volume_24h\":33903071552.817226,\"percent_change_1h\":2.64386327,\"percent_change_24h\":-10.46990835,\"percent_change_7d\":-4.37412016,\"percent_change_30d\":41.26794407,\"market_cap\":167527600565.963,\"last_updated\":\"2021-02-22T21:06:05.000Z\"}}}}}")
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elapsed time: 323.584665ms
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3>
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```
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Calling `interface` lists both the curl_adapter and ether_price_getter interfaces. Calling the `ether_price_getter` service function with the API key and conversion currency symbol, `"35fd4b0e-56cf-4182-8f22-d4095cf0a738", "EUR"`, yields the raw json string result expected.
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## How to Deploy The Service
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ToDo: fldist installatin instructions
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If you don't have a seed ready to use:
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```bash
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mbp16~/localdev/ethdenver-hackathon/ether-price-getter(eth-price-getter|…) % fldist create_keypair
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{
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id: '12D3KooWQy61BZ4P1DeJzhvsQ76uQAQc7N8tDk6NDz5BFnnhwuPP',
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privKey: 'CAESYI9nA79xXH9yYeuU4UDPiaa7C84U0OKnihdSkSdbMOIV4RtA5l9dooR41cO8lCz3okYpEboK6maL7yk1ABgCvrLhG0DmX12ihHjVw7yULPeiRikRugrqZovvKTUAGAK+sg==',
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pubKey: 'CAESIOEbQOZfXaKEeNXDvJQs96JGKRG6Cupmi+8pNQAYAr6y',
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seed: 'AenQdfKCRrh1sajNFkKKV1iojgVnLWyatdaqwzEMopje'
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}
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```
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which yields the keypair and seed and allows us to create a new service:
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```bash
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fldist new_service --env testnet -n "Ether Price Getter" -s AenQdfKCRrh1sajNFkKKV1iojgVnLWyatdaqwzEMopje --ms artifacts/curl_adapter.wasm:curl_cfg.json artifacts/ether_price_getter.wasm:ether_price_getter_cfg.json
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client seed: AenQdfKCRrh1sajNFkKKV1iojgVnLWyatdaqwzEMopje
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client peerId: 12D3KooWQy61BZ4P1DeJzhvsQ76uQAQc7N8tDk6NDz5BFnnhwuPP
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node peerId: 12D3KooWBUJifCTgaxAUrcM9JysqCcS4CS8tiYH5hExbdWCAoNwb
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uploading blueprint Ether Price Getter to node 12D3KooWBUJifCTgaxAUrcM9JysqCcS4CS8tiYH5hExbdWCAoNwb via client 12D3KooWQy61BZ4P1DeJzhvsQ76uQAQc7N8tDk6NDz5BFnnhwuPP
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creating service c77f4b0f-b9e2-47ca-8358-7add50bab280
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```
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```
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mbp16~/localdev/ethdenver-hackathon/ether-price-getter(eth-price-getter|✚1…) % fldist new_service --env testnet -n "Ether Price Getter" -s AenQdfKCRrh1sajNFkKKV1iojgVnLWyatdaqwzEMopje --ms artifacts/curl_adapter.wasm:curl_cfg.json artifacts/ether_price_getter.wasm:ether_price_getter_cfg.json --ttl 120000
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client seed: AenQdfKCRrh1sajNFkKKV1iojgVnLWyatdaqwzEMopje
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client peerId: 12D3KooWQy61BZ4P1DeJzhvsQ76uQAQc7N8tDk6NDz5BFnnhwuPP
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node peerId: 12D3KooWBUJifCTgaxAUrcM9JysqCcS4CS8tiYH5hExbdWCAoNwb
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uploading blueprint Ether Price Getter to node 12D3KooWBUJifCTgaxAUrcM9JysqCcS4CS8tiYH5hExbdWCAoNwb via client 12D3KooWQy61BZ4P1DeJzhvsQ76uQAQc7N8tDk6NDz5BFnnhwuPP
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creating service a7959f53-a70b-4183-83e0-649f4f91160c
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service id: 9840c6be-11c8-47e2-98e0-88d758b5a456
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service created successfully
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```
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## Timeout Error:
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```
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fldist new_service --env testnet -n "Ether Price Getter" -s AenQdfKCRrh1sajNFkKKV1iojgVnLWyatdaqwzEMopje --ms artifacts/curl_adapter.wasm:curl_cfg.json artifacts/ether_price_getter.wasm:ether_price_getter_cfg.json
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client seed: AenQdfKCRrh1sajNFkKKV1iojgVnLWyatdaqwzEMopje
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client peerId: 12D3KooWQy61BZ4P1DeJzhvsQ76uQAQc7N8tDk6NDz5BFnnhwuPP
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node peerId: 12D3KooWBUJifCTgaxAUrcM9JysqCcS4CS8tiYH5hExbdWCAoNwb
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uploading blueprint Ether Price Getter to node 12D3KooWBUJifCTgaxAUrcM9JysqCcS4CS8tiYH5hExbdWCAoNwb via client 12D3KooWQy61BZ4P1DeJzhvsQ76uQAQc7N8tDk6NDz5BFnnhwuPP
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creating service c77f4b0f-b9e2-47ca-8358-7add50bab280
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Particle expired. Now: 1614029919574, ttl: 60000, ts: 1614029859570
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Particle expired. Now: 1614029922669, ttl: 60000, ts: 1614029862668
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Particle expired. Now: 1614029925656, ttl: 60000, ts: 1614029865653
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Particle expired. Now: 1614029926178, ttl: 60000, ts: 1614029866176
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Something went wrong!
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Error: callback for _callback/createService timed out after 60000
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at Timeout._onTimeout (/Users/bebo/.nvm/versions/node/v12.16.3/lib/node_modules/@fluencelabs/fldist/node_modules/@fluencelabs/fluence/dist/api.js:169:28)
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at listOnTimeout (internal/timers.js:549:17)
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at processTimers (internal/timers.js:492:7)
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```
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and:
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```
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mbp16~/localdev/ethdenver-hackathon/ether-price-getter(eth-price-getter|✚1…) % fldist new_service --env testnet -n "Ether Price Getter" -s AenQdfKCRrh1sajNFkKKV1iojgVnLWyatdaqwzEMopje --ms artifacts/curl_adapter.wasm:curl_cfg.json artifacts/ether_price_getter.wasm:ether_price_getter_cfg.json --ttl 90000
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client seed: AenQdfKCRrh1sajNFkKKV1iojgVnLWyatdaqwzEMopje
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client peerId: 12D3KooWQy61BZ4P1DeJzhvsQ76uQAQc7N8tDk6NDz5BFnnhwuPP
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node peerId: 12D3KooWBUJifCTgaxAUrcM9JysqCcS4CS8tiYH5hExbdWCAoNwb
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uploading blueprint Ether Price Getter to node 12D3KooWBUJifCTgaxAUrcM9JysqCcS4CS8tiYH5hExbdWCAoNwb via client 12D3KooWQy61BZ4P1DeJzhvsQ76uQAQc7N8tDk6NDz5BFnnhwuPP
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creating service 95abbf2b-cf4f-4560-b3a5-2717b340ead8
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Particle expired. Now: 1614030097045, ttl: 90000, ts: 1614030007040
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Particle expired. Now: 1614030100739, ttl: 90000, ts: 1614030010735
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Particle expired. Now: 1614030104327, ttl: 90000, ts: 1614030014325
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Particle expired. Now: 1614030104850, ttl: 90000, ts: 1614030014846
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Something went wrong!
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Error: callback for _callback/createService timed out after 90000
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at Timeout._onTimeout (/Users/bebo/.nvm/versions/node/v12.16.3/lib/node_modules/@fluencelabs/fldist/node_modules/@fluencelabs/fluence/dist/api.js:169:28)
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at listOnTimeout (internal/timers.js:549:17)
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at processTimers (internal/timers.js:492:7)
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mbp16~/localdev/ethdenver-hackathon/ether-price-getter(eth-price-getter|✚1…) %
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```
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```
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mbp16~/localdev/ethdenver-hackathon/ether-price-getter(eth-price-getter|✚1…) % fldist new_service --env testnet -n "Ether Price Getter" -s AenQdfKCRrh1sajNFkKKV1iojgVnLWyatdaqwzEMopje --ms artifacts/curl_adapter.wasm:curl_cfg.json artifacts/ether_price_getter.wasm:ether_price_getter_cfg.json --ttl 180000
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client seed: AenQdfKCRrh1sajNFkKKV1iojgVnLWyatdaqwzEMopje
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client peerId: 12D3KooWQy61BZ4P1DeJzhvsQ76uQAQc7N8tDk6NDz5BFnnhwuPP
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node peerId: 12D3KooWBUJifCTgaxAUrcM9JysqCcS4CS8tiYH5hExbdWCAoNwb
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uploading blueprint Ether Price Getter to node 12D3KooWBUJifCTgaxAUrcM9JysqCcS4CS8tiYH5hExbdWCAoNwb via client 12D3KooWQy61BZ4P1DeJzhvsQ76uQAQc7N8tDk6NDz5BFnnhwuPP
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creating service 5f7497e8-1140-44e4-ad93-87d52e7cb359
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Particle expired. Now: 1614030312210, ttl: 180000, ts: 1614030132205
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Particle expired. Now: 1614030315338, ttl: 180000, ts: 1614030135336
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Particle expired. Now: 1614030318206, ttl: 180000, ts: 1614030138203
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Particle expired. Now: 1614030318738, ttl: 180000, ts: 1614030138732
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Something went wrong!
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Error: callback for _callback/createService timed out after 180000
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at Timeout._onTimeout (/Users/bebo/.nvm/versions/node/v12.16.3/lib/node_modules/@fluencelabs/fldist/node_modules/@fluencelabs/fluence/dist/api.js:169:28)
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at listOnTimeout (internal/timers.js:549:17)
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at processTimers (internal/timers.js:492:7)
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mbp16~/localdev/ethdenver-hackathon/ether-price-getter(eth-price-getter|✚1…) %
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```
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(xor
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(seq
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(call relay (service "ether_price_getter") ["42fc4b0e-59cf-4182-8f22-d4095cf0a738" "EUR"] result)
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(call %init_peer_id% (returnService "run") [result])
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)
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(seq
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(call relay ("op" "identity") [])
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(call %init_peer_id% (returnService "run") ["XOR FAILED" %last_error%])
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)
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)
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