fetch gas price corpus from network when needed
This commit is contained in:
Robert Habermeier
parent
7a857a24ae
commit
3b023c82b7
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@ -427,7 +427,7 @@ dependencies = [
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"ethcore-rpc 1.6.0",
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"ethcore-util 1.6.0",
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"fetch 0.1.0",
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"futures 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
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"futures 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
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"hyper 0.10.0-a.0 (git+https://github.com/ethcore/hyper)",
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"jsonrpc-core 6.0.0 (git+https://github.com/ethcore/jsonrpc.git)",
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"jsonrpc-http-server 6.0.0 (git+https://github.com/ethcore/jsonrpc.git)",
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@ -536,12 +536,13 @@ dependencies = [
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"ethcore-ipc-codegen 1.6.0",
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"ethcore-network 1.6.0",
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"ethcore-util 1.6.0",
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"futures 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
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"futures 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
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"itertools 0.5.9 (registry+https://github.com/rust-lang/crates.io-index)",
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"log 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
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"rand 0.3.14 (registry+https://github.com/rust-lang/crates.io-index)",
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"rlp 0.1.0",
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"smallvec 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
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"stats 0.1.0",
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"time 0.1.35 (registry+https://github.com/rust-lang/crates.io-index)",
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]
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@ -601,7 +602,7 @@ dependencies = [
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"ethstore 0.1.0",
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"ethsync 1.6.0",
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"fetch 0.1.0",
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"futures 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
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"futures 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
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"jsonrpc-core 6.0.0 (git+https://github.com/ethcore/jsonrpc.git)",
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"jsonrpc-http-server 6.0.0 (git+https://github.com/ethcore/jsonrpc.git)",
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"jsonrpc-ipc-server 6.0.0 (git+https://github.com/ethcore/jsonrpc.git)",
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@ -650,7 +651,7 @@ dependencies = [
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"ethcore-ipc-codegen 1.6.0",
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"ethcore-ipc-nano 1.6.0",
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"ethcore-util 1.6.0",
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"futures 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
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"futures 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
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"jsonrpc-core 6.0.0 (git+https://github.com/ethcore/jsonrpc.git)",
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"jsonrpc-macros 6.0.0 (git+https://github.com/ethcore/jsonrpc.git)",
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"jsonrpc-tcp-server 6.0.0 (git+https://github.com/ethcore/jsonrpc.git)",
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@ -813,7 +814,7 @@ dependencies = [
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name = "fetch"
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version = "0.1.0"
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dependencies = [
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"futures 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
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"futures 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
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"futures-cpupool 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
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"log 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
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"mime 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
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@ -832,7 +833,7 @@ dependencies = [
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[[package]]
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name = "futures"
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version = "0.1.6"
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version = "0.1.10"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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dependencies = [
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"log 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
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@ -844,7 +845,7 @@ version = "0.1.2"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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dependencies = [
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"crossbeam 0.2.10 (registry+https://github.com/rust-lang/crates.io-index)",
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"futures 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
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"futures 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
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"num_cpus 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
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]
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@ -1045,7 +1046,7 @@ name = "jsonrpc-core"
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version = "6.0.0"
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source = "git+https://github.com/ethcore/jsonrpc.git#86d7a89c85f324b5f6671315d9b71010ca995300"
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dependencies = [
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"futures 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
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"futures 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
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"log 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
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"serde 0.9.6 (registry+https://github.com/rust-lang/crates.io-index)",
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"serde_derive 0.9.6 (registry+https://github.com/rust-lang/crates.io-index)",
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@ -1565,7 +1566,7 @@ dependencies = [
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"ethabi 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
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"ethcore-util 1.6.0",
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"fetch 0.1.0",
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"futures 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
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"futures 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
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"log 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
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"mime 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
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"mime_guess 1.6.1 (registry+https://github.com/rust-lang/crates.io-index)",
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@ -1578,7 +1579,7 @@ dependencies = [
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name = "parity-reactor"
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version = "0.1.0"
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dependencies = [
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"futures 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
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"futures 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
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"tokio-core 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
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]
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@ -1589,7 +1590,7 @@ dependencies = [
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"ethcore-rpc 1.6.0",
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"ethcore-signer 1.6.0",
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"ethcore-util 1.6.0",
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"futures 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
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"futures 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
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"jsonrpc-core 6.0.0 (git+https://github.com/ethcore/jsonrpc.git)",
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"log 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
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"rand 0.3.14 (registry+https://github.com/rust-lang/crates.io-index)",
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@ -1898,7 +1899,7 @@ dependencies = [
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"ethcore-bigint 0.1.2",
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"ethcore-rpc 1.6.0",
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"ethcore-util 1.6.0",
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"futures 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
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"futures 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
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"parity-rpc-client 1.4.0",
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"rpassword 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
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]
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@ -2249,7 +2250,7 @@ name = "tokio-core"
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version = "0.1.2"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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dependencies = [
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"futures 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
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"futures 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
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"log 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
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"mio 0.6.1 (registry+https://github.com/rust-lang/crates.io-index)",
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"scoped-tls 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
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@ -2261,7 +2262,7 @@ name = "tokio-proto"
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version = "0.1.0"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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dependencies = [
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"futures 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
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"futures 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
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"log 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
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"net2 0.2.23 (registry+https://github.com/rust-lang/crates.io-index)",
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"rand 0.3.14 (registry+https://github.com/rust-lang/crates.io-index)",
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@ -2277,7 +2278,7 @@ name = "tokio-service"
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version = "0.1.0"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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dependencies = [
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"futures 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
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"futures 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
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]
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[[package]]
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@ -2503,7 +2504,7 @@ dependencies = [
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"checksum ethabi 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)" = "5d8f6cc4c1acd005f48e1d17b06a461adac8fb6eeeb331fbf19a0e656fba91cd"
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"checksum fdlimit 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "b1ee15a7050e5580b3712877157068ea713b245b080ff302ae2ca973cfcd9baa"
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"checksum flate2 0.2.14 (registry+https://github.com/rust-lang/crates.io-index)" = "3eeb481e957304178d2e782f2da1257f1434dfecbae883bafb61ada2a9fea3bb"
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"checksum futures 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)" = "0bad0a2ac64b227fdc10c254051ae5af542cf19c9328704fd4092f7914196897"
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"checksum futures 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)" = "c1913eb7083840b1bbcbf9631b7fda55eaf35fe7ead13cca034e8946f9e2bc41"
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"checksum futures-cpupool 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)" = "bb982bb25cd8fa5da6a8eb3a460354c984ff1113da82bcb4f0b0862b5795db82"
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"checksum gcc 0.3.35 (registry+https://github.com/rust-lang/crates.io-index)" = "91ecd03771effb0c968fd6950b37e89476a578aaf1c70297d8e92b6516ec3312"
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"checksum gdi32-sys 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "0912515a8ff24ba900422ecda800b52f4016a56251922d397c576bf92c690518"
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@ -23,6 +23,7 @@ smallvec = "0.3.1"
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futures = "0.1"
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rand = "0.3"
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itertools = "0.5"
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stats = { path = "../../util/stats" }
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[features]
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default = []
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@ -24,6 +24,7 @@ use ethcore::encoded;
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use ethcore::header::BlockNumber;
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use ethcore::receipt::Receipt;
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use stats::Corpus;
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use time::{SteadyTime, Duration};
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use util::{U256, H256};
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use util::cache::MemoryLruCache;
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@ -66,7 +67,7 @@ pub struct Cache {
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bodies: MemoryLruCache<H256, encoded::Body>,
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receipts: MemoryLruCache<H256, Vec<Receipt>>,
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chain_score: MemoryLruCache<H256, U256>,
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corpus: Option<(Vec<U256>, SteadyTime)>,
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corpus: Option<(Corpus<U256>, SteadyTime)>,
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corpus_expiration: Duration,
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}
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@ -135,7 +136,7 @@ impl Cache {
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}
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/// Get gas price corpus, if recent enough.
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pub fn gas_price_corpus(&self) -> Option<Vec<U256>> {
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pub fn gas_price_corpus(&self) -> Option<Corpus<U256>> {
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let now = SteadyTime::now();
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self.corpus.as_ref().and_then(|&(ref corpus, ref tm)| {
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@ -148,7 +149,7 @@ impl Cache {
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}
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/// Set the cached gas price corpus.
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pub fn set_gas_price_corpus(&mut self, corpus: Vec<U256>) {
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pub fn set_gas_price_corpus(&mut self, corpus: Corpus<U256>) {
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self.corpus = Some((corpus, SteadyTime::now()))
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}
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}
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@ -162,8 +163,8 @@ mod tests {
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fn corpus_inaccessible() {
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let mut cache = Cache::new(Default::default(), Duration::hours(5));
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cache.set_gas_price_corpus(vec![]);
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assert_eq!(cache.gas_price_corpus(), Some(vec![]));
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cache.set_gas_price_corpus(vec![].into());
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assert_eq!(cache.gas_price_corpus(), Some(vec![].into()));
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{
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let corpus_time = &mut cache.corpus.as_mut().unwrap().1;
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@ -241,6 +241,14 @@ impl HeaderChain {
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self.block_header(BlockId::Latest).expect("Header for best block always stored; qed")
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}
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/// Get an iterator over a block and its ancestry.
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pub fn ancestry_iter(&self, start: BlockId) -> AncestryIter {
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AncestryIter {
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next: self.block_header(start),
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chain: self,
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}
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}
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/// Get the nth CHT root, if it's been computed.
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///
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/// CHT root 0 is from block `1..2048`.
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@ -295,6 +303,25 @@ impl HeapSizeOf for HeaderChain {
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}
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}
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/// Iterator over a block's ancestry.
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pub struct AncestryIter<'a> {
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next: Option<encoded::Header>,
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chain: &'a HeaderChain,
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}
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impl<'a> Iterator for AncestryIter<'a> {
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type Item = encoded::Header;
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fn next(&mut self) -> Option<encoded::Header> {
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let next = self.next.take();
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if let Some(p_hash) = next.as_ref().map(|hdr| hdr.parent_hash()) {
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self.next = self.chain.block_header(BlockId::Hash(p_hash));
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}
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next
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}
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}
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#[cfg(test)]
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mod tests {
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use super::HeaderChain;
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@ -33,7 +33,7 @@ use io::IoChannel;
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use util::{Bytes, H256, Mutex, RwLock};
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use self::header_chain::HeaderChain;
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use self::header_chain::{AncestryIter, HeaderChain};
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pub use self::service::Service;
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@ -62,6 +62,9 @@ pub trait LightChainClient: Send + Sync {
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/// Get the best block header.
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fn best_block_header(&self) -> encoded::Header;
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/// Get an iterator over a block and its ancestry.
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fn ancestry_iter<'a>(&'a self, start: BlockId) -> Box<Iterator<Item=encoded::Header> + 'a>;
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/// Get the signing network ID.
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fn signing_network_id(&self) -> Option<u64>;
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@ -167,6 +170,11 @@ impl Client {
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self.chain.best_header()
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}
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/// Get an iterator over a block and its ancestry.
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pub fn ancestry_iter(&self, start: BlockId) -> AncestryIter {
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self.chain.ancestry_iter(start)
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}
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/// Get the signing network id.
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pub fn signing_network_id(&self) -> Option<u64> {
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self.engine.signing_network_id(&self.latest_env_info())
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@ -269,6 +277,10 @@ impl LightChainClient for Client {
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Client::best_block_header(self)
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}
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fn ancestry_iter<'a>(&'a self, start: BlockId) -> Box<Iterator<Item=encoded::Header> + 'a> {
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Box::new(Client::ancestry_iter(self, start))
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}
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fn signing_network_id(&self) -> Option<u64> {
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Client::signing_network_id(self)
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}
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@ -72,6 +72,7 @@ extern crate time;
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extern crate futures;
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extern crate rand;
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extern crate itertools;
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extern crate stats;
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#[cfg(feature = "ipc")]
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extern crate ethcore_ipc as ipc;
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@ -20,17 +20,18 @@ use std::fmt::Debug;
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use std::ops::Deref;
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use std::sync::{Arc, Weak};
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use futures::{future, Future, BoxFuture};
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use futures::{future, stream, Future, Stream, BoxFuture};
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use light::cache::Cache as LightDataCache;
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use light::client::LightChainClient;
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use light::on_demand::{request, OnDemand};
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use light::TransactionQueue as LightTransactionQueue;
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use rlp::{self, Stream};
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use rlp::{self, Stream as StreamRlp};
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use util::{Address, H520, H256, U256, Uint, Bytes, Mutex, RwLock};
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use util::sha3::Hashable;
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use ethkey::Signature;
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use ethsync::LightSync;
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use ethcore::ids::BlockId;
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use ethcore::miner::MinerService;
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use ethcore::client::MiningBlockChainClient;
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use ethcore::transaction::{Action, SignedTransaction, PendingTransaction, Transaction};
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@ -192,20 +193,75 @@ impl Dispatcher for LightDispatcher {
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fn fill_optional_fields(&self, request: TransactionRequest, default_sender: Address)
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-> BoxFuture<FilledTransactionRequest, Error>
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{
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let request = request;
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let gas_limit = self.client.best_block_header().gas_limit();
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const GAS_PRICE_SAMPLE_SIZE: usize = 100;
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const DEFAULT_GAS_PRICE: U256 = U256([0, 0, 0, 21_000_000]);
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future::ok(FilledTransactionRequest {
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from: request.from.unwrap_or(default_sender),
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used_default_from: request.from.is_none(),
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to: request.to,
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nonce: request.nonce,
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gas_price: request.gas_price.unwrap_or_else(|| 21_000_000.into()), // TODO: fetch corpus from network.
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gas: request.gas.unwrap_or_else(|| gas_limit / 3.into()),
|
||||
value: request.value.unwrap_or_else(|| 0.into()),
|
||||
data: request.data.unwrap_or_else(Vec::new),
|
||||
condition: request.condition,
|
||||
}).boxed()
|
||||
let gas_limit = self.client.best_block_header().gas_limit();
|
||||
let request_gas_price = request.gas_price.clone();
|
||||
|
||||
let with_gas_price = move |gas_price| {
|
||||
let request = request;
|
||||
FilledTransactionRequest {
|
||||
from: request.from.unwrap_or(default_sender),
|
||||
used_default_from: request.from.is_none(),
|
||||
to: request.to,
|
||||
nonce: request.nonce,
|
||||
gas_price: gas_price,
|
||||
gas: request.gas.unwrap_or_else(|| gas_limit / 3.into()),
|
||||
value: request.value.unwrap_or_else(|| 0.into()),
|
||||
data: request.data.unwrap_or_else(Vec::new),
|
||||
condition: request.condition,
|
||||
}
|
||||
};
|
||||
|
||||
// fast path for gas price supplied or cached corpus.
|
||||
let known_price = request_gas_price.or_else(||
|
||||
self.cache.lock().gas_price_corpus().and_then(|corp| corp.median().cloned())
|
||||
);
|
||||
|
||||
match known_price {
|
||||
Some(gas_price) => future::ok(with_gas_price(gas_price)).boxed(),
|
||||
None => {
|
||||
let cache = self.cache.clone();
|
||||
let gas_price_res = self.sync.with_context(|ctx| {
|
||||
|
||||
// get some recent headers with gas used,
|
||||
// and request each of the blocks from the network.
|
||||
let block_futures = self.client.ancestry_iter(BlockId::Latest)
|
||||
.filter(|hdr| hdr.gas_used() != U256::default())
|
||||
.take(GAS_PRICE_SAMPLE_SIZE)
|
||||
.map(request::Body::new)
|
||||
.map(|req| self.on_demand.block(ctx, req));
|
||||
|
||||
// as the blocks come in, collect gas prices into a vector
|
||||
stream::futures_unordered(block_futures)
|
||||
.fold(Vec::new(), |mut v, block| {
|
||||
for t in block.transaction_views().iter() {
|
||||
v.push(t.gas_price())
|
||||
}
|
||||
|
||||
future::ok(v)
|
||||
})
|
||||
.map(move |v| {
|
||||
// produce a corpus from the vector, cache it, and return
|
||||
// the median as the intended gas price.
|
||||
let corpus: ::stats::Corpus<_> = v.into();
|
||||
cache.lock().set_gas_price_corpus(corpus.clone());
|
||||
|
||||
|
||||
corpus.median().cloned().unwrap_or(DEFAULT_GAS_PRICE)
|
||||
})
|
||||
.map_err(|_| errors::no_light_peers())
|
||||
});
|
||||
|
||||
// attempt to fetch the median, but fall back to a hardcoded
|
||||
// value in case of weak corpus or disconnected network.
|
||||
match gas_price_res {
|
||||
Some(res) => res.map(with_gas_price).boxed(),
|
||||
None => future::ok(with_gas_price(DEFAULT_GAS_PRICE)).boxed()
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
fn sign(&self, accounts: Arc<AccountProvider>, filled: FilledTransactionRequest, password: SignWith)
|
||||
|
|
|
|||
Loading…
Reference in New Issue