Provider

Metal (chainkit-internal)

id: metal

In-process address generation + validation + fee math. Pure-Go, no network calls.

Capabilities

What this provider does inside chainkit.

Fee math
Estimate the fee for a transaction of a given size at a target priority.
Address gen
Derive a new receive address from a key or descriptor.
Address check
Validate an address string is well-formed for the active network.
Assemble
Build an unsigned transaction from inputs, outputs, and metadata.
Sign
Sign a transaction with a private key.
Size
Predict the on-wire byte size of a transaction before broadcast.

Operational

Running it in production.

Auth: none
Chains: btc/mainnetbtc/testnet3btc/testnet4
Free tier: n/a — runs locally
Paid tier: —
Rate limit: no rate limit

In the SDK

Wire Metal (chainkit-internal) via the chainkit builder.

The builder accepts every provider you want in rotation. chainkit handles failover, retries, and scoring across them — pick capability coverage, not a single vendor.

main.go

import (
 "github.com/exapsy/chainkit"
 "github.com/exapsy/chainkit/bitcoin/providers"
)

p := providers.NewMetal(/* opts — see godoc */)

client, _ := chainkit.NewMixedProvidersBuilder().
 WithProvider(p).
 Build(ctx)

Snippet illustrative; refer to the godoc for the exact constructor signature.

Last 24 hours

Live performance.

Pulled from the same scoreboard as /scoreboard, narrowed to Metal (chainkit-internal). Polled every minute.

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