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Typed chain state queries over rpc. (#4079)

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* Create typed client helpers for querying chain state storage items declared by
'decl_storage!'.

* Update substrate-rpc-custom functions to use async await syntax.

* The implementation of substrate-rpc-custom was a bit verbose and repetitive.
This commit makes the implementation simpler by intruducing a struct which
represents query for a typed value in storage. The new struct is called
StorageQuery. A StorageQuery wraps a raw StorageKey but is not directy
constructable. To construct a StorageQuery, the user must supply an
implementation of a srml_support::storage::generator trait such as
StorageValue or StorageMap.

A type implementing one of the generator traits can be aquired by:
A) marking a storage item as pub within a call to decl_storage (recommended)
or B) implementing one of the generator types manually.

While option B may sometimes me necessary, it's not recommended because
separate manual implementaions may lose sync with the original definition.

* drop unused dependency

* fmt

* Remove unnecessary pub from Authorities field in test-runtime storage
declaration.

This field was added to support a test in an earlier commit. The
test no longer relies on test-runtime so the change can be reverted.

* Move it to srml as support extension.

* Fix long lines.

* Fix.
This commit is contained in:
Tomasz Drwięga
2019-11-11 02:01:15 +01:00
committed by Bastian Köcher
parent bb0736cdba
commit 57ab3aeb82
5 changed files with 216 additions and 6 deletions
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substrate/Cargo.lock
Generated
+31
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@@ -1354,6 +1354,7 @@ name = "futures-util"
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source = "registry+https://github.com/rust-lang/crates.io-index"
dependencies = [
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"futures-core 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
"futures-io 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -1682,6 +1683,18 @@ dependencies = [
"webpki-roots 0.17.0 (registry+https://github.com/rust-lang/crates.io-index)",
]
[[package]]
name = "hyper-tls"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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"tokio-io 0.1.12 (registry+https://github.com/rust-lang/crates.io-index)",
]
[[package]]
name = "idna"
version = "0.1.5"
@@ -1803,6 +1816,7 @@ dependencies = [
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"jsonrpc-pubsub 14.0.3 (registry+https://github.com/rust-lang/crates.io-index)",
"log 0.4.8 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -4895,6 +4909,22 @@ dependencies = [
"syn 1.0.7 (registry+https://github.com/rust-lang/crates.io-index)",
]
[[package]]
name = "srml-support-rpc"
version = "2.0.0"
dependencies = [
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"srml-support 2.0.0",
"srml-system 2.0.0",
"substrate-primitives-storage 2.0.0",
"substrate-rpc-api 2.0.0",
"tokio 0.1.22 (registry+https://github.com/rust-lang/crates.io-index)",
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[[package]]
name = "srml-support-test"
version = "2.0.0"
@@ -7612,6 +7642,7 @@ dependencies = [
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"checksum hyper 0.12.35 (registry+https://github.com/rust-lang/crates.io-index)" = "9dbe6ed1438e1f8ad955a4701e9a944938e9519f6888d12d8558b645e247d5f6"
"checksum hyper-rustls 0.17.1 (registry+https://github.com/rust-lang/crates.io-index)" = "719d85c7df4a7f309a77d145340a063ea929dcb2e025bae46a80345cffec2952"
"checksum hyper-tls 0.3.2 (registry+https://github.com/rust-lang/crates.io-index)" = "3a800d6aa50af4b5850b2b0f659625ce9504df908e9733b635720483be26174f"
"checksum idna 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)" = "38f09e0f0b1fb55fdee1f17470ad800da77af5186a1a76c026b679358b7e844e"
"checksum idna 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "02e2673c30ee86b5b96a9cb52ad15718aa1f966f5ab9ad54a8b95d5ca33120a9"
"checksum impl-codec 0.4.1 (registry+https://github.com/rust-lang/crates.io-index)" = "3fa0086251524c50fd53b32e7b05eb6d79e2f97221eaf0c53c0ca9c3096f21d3"